From 4e93769dc954255c4b576fa3341b2b07ac8df590 Mon Sep 17 00:00:00 2001
From: Carla Severe <csevere@mozilla.com>
Date: Thu, 23 Jul 2026 17:24:32 -0700
Subject: [PATCH 1/6] created toggle for customizing col: simple vs power view

---
 src/common/constants.ts                       |   4 +-
 src/common/store.ts                           |   2 +
 src/common/testVersions/index.ts              |  15 +-
 src/common/testVersions/mannWhitney.tsx       | 512 ++++++++++--------
 src/common/testVersions/studentT.tsx          |  17 +-
 .../CompareResults/AdvancedColumnsToggle.tsx  |  38 ++
 .../CompareResults/ResultsControls.tsx        |  39 +-
 .../CompareResults/ResultsTable.tsx           |  18 +-
 src/components/CompareResults/RevisionRow.tsx |   6 +-
 .../SubtestsResults/SubtestsResultsMain.tsx   |   4 +
 .../SubtestsResults/SubtestsResultsTable.tsx  |  11 +-
 .../SubtestsResults/SubtestsRevisionRow.tsx   |   6 +-
 src/components/CompareResults/TableHeader.tsx |   6 +
 src/reducers/ColumnPrefsSlice.ts              |  21 +
 src/utils/rowTemplateColumns.ts               |   4 +-
 15 files changed, 451 insertions(+), 252 deletions(-)
 create mode 100644 src/components/CompareResults/AdvancedColumnsToggle.tsx
 create mode 100644 src/reducers/ColumnPrefsSlice.ts

diff --git a/src/common/constants.ts b/src/common/constants.ts
index cdafa0247..8137c73c2 100644
--- a/src/common/constants.ts
+++ b/src/common/constants.ts
@@ -338,4 +338,6 @@ export const tooltipConfidence =
 export const tooltipDelta =
   'The percentage difference between the Base and New values';
 export const tooltipMedianDiff =
-  'Median Diff %: The percentage change in median from Base to New: ((New − Base) / Base) × 100.';
+  'Shows how much the middle result changed from Base to New. We line up all the runs from smallest to biggest and pick the middle one for each side, then show the change as a percent. A postive sign means New is higher; a negative sign means New is lower.';
+export const tooltipDifferenceSize =
+  'Shows how big the difference between Base and New is, in plain words: negligible (barely any), small, medium, or large. It comes from how much the Base and New results overlap — the less they overlap, the bigger the difference.';
diff --git a/src/common/store.ts b/src/common/store.ts
index 0e46ee60d..dc1a9ed09 100644
--- a/src/common/store.ts
+++ b/src/common/store.ts
@@ -1,5 +1,6 @@
 import { configureStore } from '@reduxjs/toolkit';
 
+import columnPrefs from '../reducers/ColumnPrefsSlice';
 import comparison from '../reducers/ComparisonSlice';
 import selectedRevisions from '../reducers/SelectedRevisionsSlice';
 import theme from '../reducers/ThemeSlice';
@@ -10,6 +11,7 @@ export const createStore = () =>
       theme,
       selectedRevisions,
       comparison,
+      columnPrefs,
     },
   });
 
diff --git a/src/common/testVersions/index.ts b/src/common/testVersions/index.ts
index bf0e1ecb3..7e6962ce8 100644
--- a/src/common/testVersions/index.ts
+++ b/src/common/testVersions/index.ts
@@ -6,15 +6,23 @@ import { CombinedResultsItemType } from '../../types/state';
 import { TableConfig, TestVersion } from '../../types/types';
 
 export interface TestVersionStrategy {
-  getColumns(isSubtestTable: boolean): TableConfig;
+  // showAdvancedColumns toggles the power-user columns (CD, CLES, Sig).
+  getColumns(
+    isSubtestTable: boolean,
+    showAdvancedColumns: boolean,
+  ): TableConfig;
   getAvgValues(result: CombinedResultsItemType): {
     baseAvg: number | null;
     newAvg: number | null;
   };
-  renderColumns(result: CombinedResultsItemType): ReactNode;
+  renderColumns(
+    result: CombinedResultsItemType,
+    showAdvancedColumns: boolean,
+  ): ReactNode;
   renderSubtestColumns(
     result: CombinedResultsItemType,
     expanded: boolean,
+    showAdvancedColumns: boolean,
   ): ReactNode;
   renderExpandedLeft(result: CombinedResultsItemType): ReactNode;
   getComparisonResult(result: CombinedResultsItemType): string;
@@ -54,6 +62,7 @@ export function getStrategy(testVersion: TestVersion): TestVersionStrategy {
 export function getColumnsForVersion(
   testVersion: TestVersion,
   isSubtestTable: boolean,
+  showAdvancedColumns: boolean,
 ): TableConfig {
-  return registry[testVersion].getColumns(isSubtestTable);
+  return registry[testVersion].getColumns(isSubtestTable, showAdvancedColumns);
 }
diff --git a/src/common/testVersions/mannWhitney.tsx b/src/common/testVersions/mannWhitney.tsx
index 742855fd4..ae964acbc 100644
--- a/src/common/testVersions/mannWhitney.tsx
+++ b/src/common/testVersions/mannWhitney.tsx
@@ -26,6 +26,7 @@ import { shapiroWilkTest } from '../../utils/shapiroWilk';
 import { defaultSortFunction } from '../../utils/sortFunctions';
 import {
   tooltipBaseMean,
+  tooltipDifferenceSize,
   tooltipMedianDiff,
   tooltipNewMean,
   tooltipSignificance,
@@ -79,26 +80,155 @@ const SW_NORMALITY_THRESHOLD = 0.2;
 
 type NormalityResult = 'both' | 'one' | 'neither';
 
+// Shapiro-Wilk is run twice (base + new) per call and cell renderers invoke
+// this for every row on every render. Cache by the (stable) result object so
+// the test runs once per result rather than once per render.
+//
+// A WeakMap is a lookup table whose keys are objects (here, the result object).
+// "Weak" means it does not keep those objects alive: once a result is no longer
+// used anywhere else (e.g. the user loads new data), it gets garbage-collected
+// and its cache entry disappears on its own — so this cache never leaks memory
+// and needs no manual cleanup.
+// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WeakMap
+const normalityCache = new WeakMap<MannWhitneyResultsItem, NormalityResult>();
+
 export function checkDistributionNormality(
   result: MannWhitneyResultsItem,
 ): NormalityResult {
+  const cached = normalityCache.get(result);
+  if (cached !== undefined) return cached;
+
   const baseResult = shapiroWilkTest(result.base_runs);
   const newResult = shapiroWilkTest(result.new_runs);
   const baseNormal =
     baseResult !== null && baseResult.pvalue > SW_NORMALITY_THRESHOLD;
   const newNormal =
     newResult !== null && newResult.pvalue > SW_NORMALITY_THRESHOLD;
-  if (baseNormal && newNormal) return 'both';
-  if (baseNormal || newNormal) return 'one';
-  return 'neither';
+  const value: NormalityResult =
+    baseNormal && newNormal
+      ? 'both'
+      : baseNormal || newNormal
+        ? 'one'
+        : 'neither';
+
+  normalityCache.set(result, value);
+  return value;
 }
 
 export function isDistributionNormal(result: MannWhitneyResultsItem): boolean {
   return checkDistributionNormality(result) !== 'neither';
 }
 
+function medianOf(values: number[]): number | null {
+  if (!values.length) return null;
+  const sorted = [...values].sort((a, b) => a - b);
+  const mid = Math.floor(sorted.length / 2);
+  return sorted.length % 2 === 0
+    ? (sorted[mid - 1] + sorted[mid]) / 2
+    : sorted[mid];
+}
+
+// Δ median as a signed percentage of the base median, computed from the raw
+// runs. This is the same basis as the expanded panel's "Δ median" blurb
+// (bootstrapMedianDiffCI's point estimate is median(new) - median(base) over
+// the same runs), so the column and the panel always agree.
+//
+// Cached by the (stable) result object (see the WeakMap note on normalityCache
+// above): this is called per row on every render and, in the Δ Median % sort
+// comparator, on every comparison — recomputing the median (which sorts both
+// run arrays) each time would be wasteful.
+const medianDiffPctCache = new WeakMap<MannWhitneyResultsItem, number | null>();
+
+export function medianDiffPct(result: MannWhitneyResultsItem): number | null {
+  const cached = medianDiffPctCache.get(result);
+  if (cached !== undefined) return cached;
+
+  const baseMedian = medianOf(result.base_runs ?? []);
+  const newMedian = medianOf(result.new_runs ?? []);
+  const value =
+    baseMedian === null || newMedian === null || baseMedian === 0
+      ? null
+      : ((newMedian - baseMedian) / baseMedian) * 100;
+
+  medianDiffPctCache.set(result, value);
+  return value;
+}
+
+export function formatMedianDiffPct(pct: number): string {
+  return `${pct >= 0 ? '+' : ''}${pct.toFixed(2)}%`;
+}
+
+// Plain-language "Difference Size" cell — the Cliff's Delta interpretation
+// (negligible/small/medium/large). Shared by the main and subtests rows so
+// they render identically.
+function renderDifferenceSizeCell(interpretation: string) {
+  return (
+    <div className='difference-size cell' role='cell'>
+      {interpretation ? capitalize(interpretation) : '-'}
+    </div>
+  );
+}
+
+function renderStatusCell(
+  directionOfChange: MannWhitneyResultsItem['direction_of_change'],
+) {
+  const isImprovement = directionOfChange === 'improvement';
+  const isRegression = directionOfChange === 'regression';
+  return (
+    <div className='status cell' role='cell'>
+      <Box
+        sx={{
+          bgcolor: isImprovement
+            ? 'status.improvement'
+            : isRegression
+              ? 'status.regression'
+              : 'none',
+        }}
+        className={`status-hint ${determineStatusHintClass(
+          isImprovement,
+          isRegression,
+        )}`}
+      >
+        {isImprovement ? <ThumbUpIcon color='success' /> : null}
+        {isRegression ? <ThumbDownIcon color='error' /> : null}
+        {capitalize(directionOfChange ?? '')}
+      </Box>
+    </div>
+  );
+}
+
+// Δ Median % cell, shared by the main and subtests rows. Shows the run-based
+// median difference; a warning icon flags non-normal distributions, and "-"
+// when the value can't be computed.
+function renderMedianDiffCell(result: MannWhitneyResultsItem) {
+  const pct = medianDiffPct(result);
+  const normality = checkDistributionNormality(result);
+  return (
+    <div className='median-diff cell' role='cell'>
+      {pct === null ? (
+        '-'
+      ) : (
+        <span
+          style={{ display: 'inline-flex', alignItems: 'center', gap: '4px' }}
+        >
+          {formatMedianDiffPct(pct)}
+          {normality !== 'both' && (
+            <WarningIcon
+              titleAccess="Distribution shapes aren't normal."
+              sx={{ fontSize: '0.9rem', opacity: 0.5, ml: '4px' }}
+            />
+          )}
+        </span>
+      )}
+    </div>
+  );
+}
+
 export const mannWhitneyStrategy = {
-  getColumns(isSubtestTable: boolean): TableConfig {
+  getColumns(
+    isSubtestTable: boolean,
+    showAdvancedColumns: boolean,
+  ): TableConfig {
     const platformConfig = isSubtestTable
       ? {
           name: 'Subtests',
@@ -133,20 +263,19 @@ export const mannWhitneyStrategy = {
       { key: 'comparisonSign', gridWidth: '0.25fr' },
       { name: 'New', key: 'new', gridWidth: '1fr', tooltip: tooltipNewMean },
       {
-        name: 'MD (%)',
+        name: 'Δ Median %',
         key: 'median-diff',
-        gridWidth: '1fr',
+        gridWidth: showAdvancedColumns ? '1.5fr' : '1fr',
         sortFunction(
           resultA: MannWhitneyResultsItem,
           resultB: MannWhitneyResultsItem,
         ) {
-          // Compute a normalized median diff percentage where positive
-          // means "improved" regardless of whether lower or higher is better.
+          // Normalize so positive means "improved" regardless of whether lower
+          // or higher is better. Uses the same run-based Δ median % the cell
+          // displays, so sort order matches the shown values.
           const normalizedDiffPct = (r: MannWhitneyResultsItem) => {
-            const base = r.base_standard_stats?.median ?? 0;
-            const newVal = r.new_standard_stats?.median ?? 0;
-            const rawPct = base !== 0 ? ((newVal - base) / base) * 100 : 0;
-            return r.lower_is_better ? -rawPct : rawPct;
+            const pct = medianDiffPct(r) ?? 0;
+            return r.lower_is_better ? -pct : pct;
           };
 
           return normalizedDiffPct(resultB) - normalizedDiffPct(resultA);
@@ -178,66 +307,100 @@ export const mannWhitneyStrategy = {
         },
         tooltip: tooltipStatusMannWhitney,
       },
-      {
-        name: 'CD',
-        key: 'delta',
-        gridWidth: '1fr',
-        sortFunction(
-          resultA: MannWhitneyResultsItem,
-          resultB: MannWhitneyResultsItem,
-        ) {
-          return (
-            Math.abs(resultA.cliffs_delta) - Math.abs(resultB.cliffs_delta)
-          );
-        },
-        tooltip: tooltipCliffsDelta,
-      },
-      {
-        name: 'CLES (%)',
-        key: 'effects',
-        gridWidth: '1.25fr',
-        sortFunction(
-          resultA: MannWhitneyResultsItem,
-          resultB: MannWhitneyResultsItem,
-        ) {
-          return (
-            Math.abs((resultA.cles?.cles ?? 0.5) - 0.5) -
-            Math.abs((resultB.cles?.cles ?? 0.5) - 0.5)
-          );
-        },
-        tooltip: tooltipEffectSize,
-      },
-      {
-        name: 'Sig',
-        key: 'significance',
-        filter: true,
-        gridWidth: '1.25fr',
-        tooltip: tooltipSignificance,
-        possibleValues: [
-          {
-            label: 'Significant',
-            key: 'significant',
-            icon: <KeyboardDoubleArrowUpIcon fontSize='small' />,
-          },
-          {
-            label: 'Not Significant',
-            key: 'not significant',
-            icon: <div>-</div>,
-          },
-        ],
-        matchesFunction(result: MannWhitneyResultsItem, valueKey: string) {
-          return result.mann_whitney_test?.interpretation === valueKey;
-        },
-        sortFunction(
-          resultA: MannWhitneyResultsItem,
-          resultB: MannWhitneyResultsItem,
-        ) {
-          return (
-            Math.abs(resultA.mann_whitney_test?.pvalue ?? 0) -
-            Math.abs(resultB.mann_whitney_test?.pvalue ?? 0)
-          );
-        },
-      },
+      // Plain-language size of the difference (the Cliff's Delta
+      // interpretation: negligible/small/medium/large). Simplified view only.
+      // Sorted by the magnitude of Cliff's Delta, which is what the buckets
+      // derive from, so the order matches the labels.
+      ...(!showAdvancedColumns
+        ? [
+            {
+              name: 'Difference Size',
+              key: 'difference-size',
+              gridWidth: '1fr',
+              sortFunction(
+                resultA: MannWhitneyResultsItem,
+                resultB: MannWhitneyResultsItem,
+              ) {
+                return (
+                  Math.abs(resultA.cliffs_delta) -
+                  Math.abs(resultB.cliffs_delta)
+                );
+              },
+              tooltip: tooltipDifferenceSize,
+            },
+          ]
+        : []),
+      // Advanced (power-user) columns — hidden in the simplified view. Kept in
+      // sync with the matching cells in renderColumns/renderSubtestColumns,
+      // which gate on the same showAdvancedColumns flag.
+      ...(showAdvancedColumns
+        ? [
+            {
+              name: 'CD',
+              key: 'delta',
+              gridWidth: '1fr',
+              sortFunction(
+                resultA: MannWhitneyResultsItem,
+                resultB: MannWhitneyResultsItem,
+              ) {
+                return (
+                  Math.abs(resultA.cliffs_delta) -
+                  Math.abs(resultB.cliffs_delta)
+                );
+              },
+              tooltip: tooltipCliffsDelta,
+            },
+            {
+              name: 'CLES %',
+              key: 'effects',
+              gridWidth: '1.25fr',
+              sortFunction(
+                resultA: MannWhitneyResultsItem,
+                resultB: MannWhitneyResultsItem,
+              ) {
+                return (
+                  Math.abs((resultA.cles?.cles ?? 0.5) - 0.5) -
+                  Math.abs((resultB.cles?.cles ?? 0.5) - 0.5)
+                );
+              },
+              tooltip: tooltipEffectSize,
+            },
+            {
+              name: 'Sig',
+              key: 'significance',
+              filter: true,
+              gridWidth: '1.25fr',
+              tooltip: tooltipSignificance,
+              possibleValues: [
+                {
+                  label: 'Significant',
+                  key: 'significant',
+                  icon: <KeyboardDoubleArrowUpIcon fontSize='small' />,
+                },
+                {
+                  label: 'Not Significant',
+                  key: 'not significant',
+                  icon: <div>-</div>,
+                },
+              ],
+              matchesFunction(
+                result: MannWhitneyResultsItem,
+                valueKey: string,
+              ) {
+                return result.mann_whitney_test?.interpretation === valueKey;
+              },
+              sortFunction(
+                resultA: MannWhitneyResultsItem,
+                resultB: MannWhitneyResultsItem,
+              ) {
+                return (
+                  Math.abs(resultA.mann_whitney_test?.pvalue ?? 0) -
+                  Math.abs(resultB.mann_whitney_test?.pvalue ?? 0)
+                );
+              },
+            },
+          ]
+        : []),
 
       {
         name: 'Total Trials',
@@ -258,10 +421,15 @@ export const mannWhitneyStrategy = {
     };
   },
 
-  renderSubtestColumns(result: CombinedResultsItemType, expanded: boolean) {
+  renderSubtestColumns(
+    result: CombinedResultsItemType,
+    expanded: boolean,
+    showAdvancedColumns: boolean,
+  ) {
     const {
       test,
       cliffs_delta,
+      cliffs_interpretation,
       mann_whitney_test,
       cles,
       direction_of_change,
@@ -295,75 +463,29 @@ export const mannWhitneyStrategy = {
             <span className={FontSize.xSmall}>({newApp})</span>
           )}
         </div>
-        <div className='median-diff cell' role='cell'>
-          {(() => {
-            const mwResult = result as MannWhitneyResultsItem;
-            const normality = checkDistributionNormality(mwResult);
-            if (normality === 'neither') return '-';
-            const baseMedian = mwResult.base_standard_stats?.median ?? 0;
-            const newMedian = mwResult.new_standard_stats?.median ?? 0;
-            const pct =
-              baseMedian !== 0
-                ? ((newMedian - baseMedian) / baseMedian) * 100
-                : 0;
-            return (
-              <span
-                style={{
-                  display: 'inline-flex',
-                  alignItems: 'center',
-                  gap: '4px',
-                }}
-              >
-                {`${formatNumber(pct)} %`}
-                {normality === 'one' && (
-                  <WarningIcon
-                    titleAccess="Distribution shapes aren't normal."
-                    sx={{ fontSize: '0.9rem', opacity: 0.5, ml: '4px' }}
-                  />
-                )}
-              </span>
-            );
-          })()}
-        </div>
-        <div className='status cell' role='cell'>
-          <Box
-            sx={{
-              bgcolor:
-                direction_of_change === 'improvement'
-                  ? 'status.improvement'
-                  : direction_of_change === 'regression'
-                    ? 'status.regression'
-                    : 'none',
-            }}
-            className={`status-hint ${determineStatusHintClass(
-              direction_of_change === 'improvement',
-              direction_of_change === 'regression',
-            )}`}
-          >
-            {direction_of_change === 'improvement' ? (
-              <ThumbUpIcon color='success' />
-            ) : null}
-            {direction_of_change === 'regression' ? (
-              <ThumbDownIcon color='error' />
-            ) : null}
-            {capitalize(direction_of_change ?? '')}
-          </Box>
-        </div>
-        <div className='delta cell' role='cell'>
-          {' '}
-          {cliffs_delta || '-'}
-        </div>
+        {renderMedianDiffCell(result as MannWhitneyResultsItem)}
+        {renderStatusCell(direction_of_change)}
+        {!showAdvancedColumns &&
+          renderDifferenceSizeCell(cliffs_interpretation)}
+        {showAdvancedColumns && (
+          <>
+            <div className='delta cell' role='cell'>
+              {' '}
+              {cliffs_delta || '-'}
+            </div>
 
-        <div className='effects cell' role='cell'>
-          {clesVal ? `${clesVal}% ` : '-'}
-        </div>
-        <div className='significance cell' role='cell'>
-          {mann_whitney_test?.interpretation === 'significant' ? (
-            <KeyboardDoubleArrowUpIcon fontSize='small' />
-          ) : (
-            '-'
-          )}
-        </div>
+            <div className='effects cell' role='cell'>
+              {clesVal ? `${clesVal}% ` : '-'}
+            </div>
+            <div className='significance cell' role='cell'>
+              {mann_whitney_test?.interpretation === 'significant' ? (
+                <KeyboardDoubleArrowUpIcon fontSize='small' />
+              ) : (
+                '-'
+              )}
+            </div>
+          </>
+        )}
       </>
     );
   },
@@ -415,21 +537,13 @@ export const mannWhitneyStrategy = {
       ? adaptUnit([ci.medianDiff, ci.ciLow, ci.ciHigh], rawUnit)
       : adaptUnit([], rawUnit);
     const ciCrossesZero = ci && ci.ciLow < 0 && ci.ciHigh > 0;
-    const baseMedian = (() => {
-      if (!baseRuns.length) return null;
-      const s = [...baseRuns].sort((a, b) => a - b);
-      const m = Math.floor(s.length / 2);
-      return s.length % 2 === 0 ? (s[m - 1] + s[m]) / 2 : s[m];
-    })();
-    const pctDiff =
-      baseMedian && ci ? ((ci.medianDiff / baseMedian) * 100).toFixed(1) : null;
+    // Same run-based Δ median % the column shows, formatted identically.
+    const pctDiff = medianDiffPct(mwResult);
     const summary = ci ? (
       <span>
         <strong>Δ median</strong> = {fmt(ci.medianDiff)} {displayUnit}
-        {pctDiff !== null
-          ? ` (${Number(pctDiff) >= 0 ? '+' : ''}${pctDiff}%)`
-          : ''}{' '}
-        95% CI [{fmt(ci.ciLow)}, {fmt(ci.ciHigh)}]
+        {pctDiff !== null ? ` (${formatMedianDiffPct(pctDiff)})` : ''} 95% CI [
+        {fmt(ci.ciLow)}, {fmt(ci.ciHigh)}]
         {ciCrossesZero
           ? ' ⚠ interval includes zero — effect direction uncertain'
           : ''}
@@ -474,84 +588,40 @@ export const mannWhitneyStrategy = {
     );
   },
 
-  renderColumns(result: CombinedResultsItemType) {
+  renderColumns(result: CombinedResultsItemType, showAdvancedColumns: boolean) {
+    const mwResult = result as MannWhitneyResultsItem;
     const {
       cliffs_delta,
+      cliffs_interpretation,
       direction_of_change,
       mann_whitney_test,
       cles,
-      base_standard_stats,
-      new_standard_stats,
-    } = result as MannWhitneyResultsItem;
+    } = mwResult;
     const clesValue = cles?.cles ? `${(cles.cles * 100).toFixed(2)} %` : '-';
-    const baseMedian = base_standard_stats?.median ?? 0;
-    const newMedian = new_standard_stats?.median ?? 0;
-    const medianDiffPct =
-      baseMedian !== 0 ? ((newMedian - baseMedian) / baseMedian) * 100 : 0;
-    const normality = checkDistributionNormality(
-      result as MannWhitneyResultsItem,
-    );
 
     return (
       <>
-        <div className='median-diff cell' role='cell'>
-          {normality === 'neither' ? (
-            '-'
-          ) : (
-            <span
-              style={{
-                display: 'inline-flex',
-                alignItems: 'center',
-                gap: '4px',
-              }}
-            >
-              {`${formatNumber(medianDiffPct)} %`}
-              {normality === 'one' && (
-                <WarningIcon
-                  titleAccess="Distribution shapes aren't normal."
-                  sx={{ fontSize: '0.9rem', opacity: 0.5, ml: '4px' }}
-                />
+        {renderMedianDiffCell(mwResult)}
+        {renderStatusCell(direction_of_change)}
+        {!showAdvancedColumns &&
+          renderDifferenceSizeCell(cliffs_interpretation)}
+        {showAdvancedColumns && (
+          <>
+            <div className='delta cell' role='cell'>
+              {cliffs_delta || '-'}
+            </div>
+            <div className='effects cell' role='cell'>
+              {clesValue}
+            </div>
+            <div className='significance cell' role='cell'>
+              {mann_whitney_test?.interpretation === 'significant' ? (
+                <KeyboardDoubleArrowUpIcon fontSize='small' />
+              ) : (
+                '-'
               )}
-            </span>
-          )}
-        </div>
-        <div className='status cell' role='cell'>
-          <Box
-            sx={{
-              bgcolor:
-                direction_of_change === 'improvement'
-                  ? 'status.improvement'
-                  : direction_of_change === 'regression'
-                    ? 'status.regression'
-                    : 'none',
-            }}
-            className={`status-hint ${determineStatusHintClass(
-              direction_of_change === 'improvement',
-              direction_of_change === 'regression',
-            )}`}
-          >
-            {direction_of_change === 'improvement' ? (
-              <ThumbUpIcon color='success' />
-            ) : null}
-            {direction_of_change === 'regression' ? (
-              <ThumbDownIcon color='error' />
-            ) : null}
-            {capitalize(direction_of_change ?? '')}
-          </Box>
-        </div>
-        <div className='delta cell' role='cell'>
-          {cliffs_delta || '-'}
-        </div>
-        <div className='effects cell' role='cell'>
-          {clesValue}
-        </div>
-        <div className='significance cell' role='cell'>
-          {mann_whitney_test?.interpretation === 'significant' ? (
-            <KeyboardDoubleArrowUpIcon fontSize='small' />
-          ) : (
-            '-'
-          )}
-        </div>
+            </div>
+          </>
+        )}
       </>
     );
   },
diff --git a/src/common/testVersions/studentT.tsx b/src/common/testVersions/studentT.tsx
index 89c138cc9..266280ee5 100644
--- a/src/common/testVersions/studentT.tsx
+++ b/src/common/testVersions/studentT.tsx
@@ -1,3 +1,4 @@
+/* eslint-disable @typescript-eslint/no-unused-vars */
 import DragHandleIcon from '@mui/icons-material/DragHandle';
 import KeyboardArrowDownIcon from '@mui/icons-material/KeyboardArrowDown';
 import KeyboardArrowUpIcon from '@mui/icons-material/KeyboardArrowUp';
@@ -41,7 +42,10 @@ const confidenceIcons: Record<'Low' | 'Medium' | 'High', React.ReactNode> = {
 };
 
 export const studentTStrategy = {
-  getColumns(isSubtestTable: boolean): TableConfig {
+  getColumns(
+    isSubtestTable: boolean,
+    _showAdvancedColumns: boolean,
+  ): TableConfig {
     const platformConfig = isSubtestTable
       ? {
           name: 'Subtests',
@@ -159,7 +163,11 @@ export const studentTStrategy = {
     };
   },
 
-  renderSubtestColumns(result: CombinedResultsItemType, expanded: boolean) {
+  renderSubtestColumns(
+    result: CombinedResultsItemType,
+    expanded: boolean,
+    _showAdvancedColumns: boolean,
+  ) {
     const {
       test,
       delta_percentage: deltaPercent,
@@ -308,7 +316,10 @@ export const studentTStrategy = {
     return null;
   },
 
-  renderColumns(result: CombinedResultsItemType) {
+  renderColumns(
+    result: CombinedResultsItemType,
+    _showAdvancedColumns: boolean,
+  ) {
     const {
       is_improvement: improvement,
       is_regression: regression,
diff --git a/src/components/CompareResults/AdvancedColumnsToggle.tsx b/src/components/CompareResults/AdvancedColumnsToggle.tsx
new file mode 100644
index 000000000..72728b856
--- /dev/null
+++ b/src/components/CompareResults/AdvancedColumnsToggle.tsx
@@ -0,0 +1,38 @@
+import Checkbox from '@mui/material/Checkbox';
+import FormControlLabel from '@mui/material/FormControlLabel';
+import Tooltip from '@mui/material/Tooltip';
+
+import { useAppDispatch, useAppSelector } from '../../hooks/app';
+import { updateShowAdvancedColumns } from '../../reducers/ColumnPrefsSlice';
+
+// Checkbox that toggles the advanced statistics columns (Cliff's Delta, CLES,
+// Significance) in the results tables. Self-contained: reads/writes the
+// columnPrefs Redux slice and mirrors the choice to localStorage so it
+// persists across reloads. Shared by the main results controls and the
+// subtests controls so the two stay in sync.
+function AdvancedColumnsToggle() {
+  const dispatch = useAppDispatch();
+  const showAdvancedColumns = useAppSelector(
+    (state) => state.columnPrefs.showAdvancedColumns,
+  );
+  const onChange = (checked: boolean) => {
+    dispatch(updateShowAdvancedColumns(checked));
+    localStorage.setItem('showAdvancedColumns', String(checked));
+  };
+  return (
+    <Tooltip title='Show the advanced statistics columns (Cliff’s Delta, CLES, Significance)'>
+      <FormControlLabel
+        control={
+          <Checkbox
+            checked={showAdvancedColumns}
+            onChange={(e) => onChange(e.target.checked)}
+            size='small'
+          />
+        }
+        label='Advanced columns'
+      />
+    </Tooltip>
+  );
+}
+
+export default AdvancedColumnsToggle;
diff --git a/src/components/CompareResults/ResultsControls.tsx b/src/components/CompareResults/ResultsControls.tsx
index 103ec22cf..0d27c29e4 100644
--- a/src/components/CompareResults/ResultsControls.tsx
+++ b/src/components/CompareResults/ResultsControls.tsx
@@ -1,3 +1,4 @@
+import Box from '@mui/material/Box';
 import Checkbox from '@mui/material/Checkbox';
 import FormControl from '@mui/material/FormControl';
 import FormControlLabel from '@mui/material/FormControlLabel';
@@ -5,6 +6,7 @@ import Grid from '@mui/material/Grid';
 import Tooltip from '@mui/material/Tooltip';
 import { style } from 'typestyle';
 
+import AdvancedColumnsToggle from './AdvancedColumnsToggle';
 import { DownloadButton } from './DownloadButton';
 import RevisionSelect from './RevisionSelect';
 import SearchInput from './SearchInput';
@@ -90,25 +92,34 @@ export default function ResultsControls({
           />
         </FormControl>
       </Grid>
-      <Grid size='grow'>
+      <Grid size='grow' sx={{ minWidth: 150 }}>
         <RevisionSelect />
       </Grid>
-      <Grid size='grow'>
+      <Grid size='grow' sx={{ minWidth: 140 }}>
         <DownloadButton resultsPromise={resultsPromise} />
       </Grid>
       <Grid size='auto'>
-        <Tooltip title='Expand all rows'>
-          <FormControlLabel
-            control={
-              <Checkbox
-                checked={expandAll}
-                onChange={(e) => onExpandAllChange(e.target.checked)}
-                size='small'
-              />
-            }
-            label='Expand all'
-          />
-        </Tooltip>
+        <Box
+          sx={{
+            display: 'flex',
+            flexDirection: 'column',
+            whiteSpace: 'nowrap',
+          }}
+        >
+          <AdvancedColumnsToggle />
+          <Tooltip title='Expand all rows'>
+            <FormControlLabel
+              control={
+                <Checkbox
+                  checked={expandAll}
+                  onChange={(e) => onExpandAllChange(e.target.checked)}
+                  size='small'
+                />
+              }
+              label='Expand all'
+            />
+          </Tooltip>
+        </Box>
       </Grid>
     </Grid>
   );
diff --git a/src/components/CompareResults/ResultsTable.tsx b/src/components/CompareResults/ResultsTable.tsx
index 3205fb5fe..8ca6a81e8 100644
--- a/src/components/CompareResults/ResultsTable.tsx
+++ b/src/components/CompareResults/ResultsTable.tsx
@@ -1,4 +1,4 @@
-import { Suspense, useState } from 'react';
+import { Suspense, useMemo, useState } from 'react';
 
 import Box from '@mui/material/Box';
 import CircularProgress from '@mui/material/CircularProgress';
@@ -10,6 +10,7 @@ import ResultsControls from './ResultsControls';
 import TableContent from './TableContent';
 import TableHeader from './TableHeader';
 import { MANN_WHITNEY_U } from '../../common/constants';
+import { useAppSelector } from '../../hooks/app';
 import useRawSearchParams from '../../hooks/useRawSearchParams';
 import useTableFilters from '../../hooks/useTableFilters';
 import useTableSort from '../../hooks/useTableSort';
@@ -35,9 +36,18 @@ export default function ResultsTable() {
   // This is our custom hook that updates the search params without a rerender.
   const [rawSearchParams, updateRawSearchParams] = useRawSearchParams();
 
-  const columnsConfig = getColumnsConfiguration(
-    false,
-    testVersion ?? MANN_WHITNEY_U,
+  const showAdvancedColumns = useAppSelector(
+    (state) => state.columnPrefs.showAdvancedColumns,
+  );
+
+  const columnsConfig = useMemo(
+    () =>
+      getColumnsConfiguration(
+        false,
+        testVersion ?? MANN_WHITNEY_U,
+        showAdvancedColumns,
+      ),
+    [testVersion, showAdvancedColumns],
   );
 
   // This is our custom hook that manages table filters
diff --git a/src/components/CompareResults/RevisionRow.tsx b/src/components/CompareResults/RevisionRow.tsx
index 5a4a18f22..569107c59 100644
--- a/src/components/CompareResults/RevisionRow.tsx
+++ b/src/components/CompareResults/RevisionRow.tsx
@@ -12,6 +12,7 @@ import { RetriggerButton } from './Retrigger/RetriggerButton';
 import RevisionRowExpandable from './RevisionRowExpandable';
 import { compareView, compareOverTimeView } from '../../common/constants';
 import { getStrategy } from '../../common/testVersions';
+import { useAppSelector } from '../../hooks/app';
 import { useSubtestRegressionCount } from '../../hooks/useSubtestRegressionCount';
 import { Strings } from '../../resources/Strings';
 import { FontSize, Spacing } from '../../styles';
@@ -246,6 +247,9 @@ function RevisionRow(props: RevisionRowProps) {
     : baseRuns.length;
   const newRunsCount = replicates ? newRunsReplicates.length : newRuns.length;
   const strategy = getStrategy(testVersion);
+  const showAdvancedColumns = useAppSelector(
+    (state) => state.columnPrefs.showAdvancedColumns,
+  );
   const { baseAvg: baseAvgValue, newAvg: newAvgValue } =
     strategy.getAvgValues(result);
   const [expanded, setExpanded] = useState(false);
@@ -312,7 +316,7 @@ function RevisionRow(props: RevisionRowProps) {
             <span className={FontSize.xSmall}>({newApp})</span>
           )}
         </div>
-        {strategy.renderColumns(result)}
+        {strategy.renderColumns(result, showAdvancedColumns)}
         <div
           className='total-runs cell'
           title={`Base runs: ${baseRunsCount}, New runs: ${newRunsCount}`}
diff --git a/src/components/CompareResults/SubtestsResults/SubtestsResultsMain.tsx b/src/components/CompareResults/SubtestsResults/SubtestsResultsMain.tsx
index 1a9c9dd5b..b918e5692 100644
--- a/src/components/CompareResults/SubtestsResults/SubtestsResultsMain.tsx
+++ b/src/components/CompareResults/SubtestsResults/SubtestsResultsMain.tsx
@@ -10,6 +10,7 @@ import { style } from 'typestyle';
 import SubtestsBreadcrumbs from './SubtestsBreadcrumbs';
 import SubtestsResultsTable from './SubtestsResultsTable';
 import SubtestsRevisionHeader from './SubtestsRevisionHeader';
+import AdvancedColumnsToggle from '.././AdvancedColumnsToggle';
 import { DownloadButton, DisabledDownloadButton } from '.././DownloadButton';
 import SearchInput from '.././SearchInput';
 import {
@@ -88,6 +89,9 @@ function SubtestsResultsHeader({
         <Grid size='auto'>
           <RetriggerButton result={loadedResults[0]} variant='text' />
         </Grid>
+        <Grid size='auto' sx={{ whiteSpace: 'nowrap' }}>
+          <AdvancedColumnsToggle />
+        </Grid>
       </Grid>
     </>
   );
diff --git a/src/components/CompareResults/SubtestsResults/SubtestsResultsTable.tsx b/src/components/CompareResults/SubtestsResults/SubtestsResultsTable.tsx
index 138c795d6..67db241ea 100644
--- a/src/components/CompareResults/SubtestsResults/SubtestsResultsTable.tsx
+++ b/src/components/CompareResults/SubtestsResults/SubtestsResultsTable.tsx
@@ -8,6 +8,7 @@ import SubtestsTableContent from './SubtestsTableContent';
 import NoResultsFound from '.././NoResultsFound';
 import TableHeader from '.././TableHeader';
 import { STUDENT_T } from '../../../common/constants';
+import { useAppSelector } from '../../../hooks/app';
 import useTableFilters, { filterResults } from '../../../hooks/useTableFilters';
 import useTableSort, { sortResults } from '../../../hooks/useTableSort';
 import type { CombinedResultsItemType } from '../../../types/state';
@@ -79,9 +80,13 @@ function SubtestsResultsTable({
   replicates,
   testVersion,
 }: ResultsTableProps) {
-  const columnsConfiguration = getColumnsConfiguration(
-    true,
-    testVersion ?? STUDENT_T,
+  const showAdvancedColumns = useAppSelector(
+    (state) => state.columnPrefs.showAdvancedColumns,
+  );
+  const columnsConfiguration = useMemo(
+    () =>
+      getColumnsConfiguration(true, testVersion ?? STUDENT_T, showAdvancedColumns),
+    [testVersion, showAdvancedColumns],
   );
   // This is our custom hook that manages table filters
   // and provides methods for clearing and toggling them.
diff --git a/src/components/CompareResults/SubtestsResults/SubtestsRevisionRow.tsx b/src/components/CompareResults/SubtestsResults/SubtestsRevisionRow.tsx
index 0529f5495..668ee17b6 100644
--- a/src/components/CompareResults/SubtestsResults/SubtestsRevisionRow.tsx
+++ b/src/components/CompareResults/SubtestsResults/SubtestsRevisionRow.tsx
@@ -9,6 +9,7 @@ import { style } from 'typestyle';
 import RevisionRowExpandable from '.././RevisionRowExpandable';
 import { MANN_WHITNEY_U } from '../../../common/constants';
 import { getStrategy } from '../../../common/testVersions';
+import { useAppSelector } from '../../../hooks/app';
 import { Strings } from '../../../resources/Strings';
 import { Spacing } from '../../../styles';
 import type { CombinedResultsItemType } from '../../../types/state';
@@ -119,6 +120,9 @@ function SubtestsRevisionRow(props: RevisionRowProps) {
   };
 
   const strategy = getStrategy(testVersion ?? MANN_WHITNEY_U);
+  const showAdvancedColumns = useAppSelector(
+    (state) => state.columnPrefs.showAdvancedColumns,
+  );
 
   return (
     <>
@@ -127,7 +131,7 @@ function SubtestsRevisionRow(props: RevisionRowProps) {
         sx={{ gridTemplateColumns, backgroundColor: 'revisionRow.background' }}
         role='row'
       >
-        {strategy.renderSubtestColumns(result, expanded)}
+        {strategy.renderSubtestColumns(result, expanded, showAdvancedColumns)}
         <div
           className='total-runs cell'
           title={`Base runs: ${baseRunsCount}, New runs: ${newRunsCount}`}
diff --git a/src/components/CompareResults/TableHeader.tsx b/src/components/CompareResults/TableHeader.tsx
index 6e6c55490..ace4cb83b 100644
--- a/src/components/CompareResults/TableHeader.tsx
+++ b/src/components/CompareResults/TableHeader.tsx
@@ -325,6 +325,12 @@ function TableHeader({
           justifySelf: 'start',
           paddingInlineStart: Spacing.xLarge, // Synchronize with the platform row
         },
+        '.difference-size-header': {
+          fontSize: '14px',
+        },
+        '.difference-size-header .MuiButtonBase-root': {
+          fontSize: '14px',
+        },
       },
     }),
 
diff --git a/src/reducers/ColumnPrefsSlice.ts b/src/reducers/ColumnPrefsSlice.ts
new file mode 100644
index 000000000..03784af5a
--- /dev/null
+++ b/src/reducers/ColumnPrefsSlice.ts
@@ -0,0 +1,21 @@
+import { createSlice, PayloadAction } from '@reduxjs/toolkit';
+
+// Power-user preference: when true the results table shows the advanced
+// columns (CD, CLES, Sig); when false it shows the simplified view. Persisted
+// to localStorage so the choice survives reloads.
+const initialState: { showAdvancedColumns: boolean } = {
+  showAdvancedColumns: localStorage.getItem('showAdvancedColumns') === 'true',
+};
+
+const columnPrefs = createSlice({
+  name: 'columnPrefs',
+  initialState,
+  reducers: {
+    updateShowAdvancedColumns(state, action: PayloadAction<boolean>) {
+      state.showAdvancedColumns = action.payload;
+    },
+  },
+});
+
+export const { updateShowAdvancedColumns } = columnPrefs.actions;
+export default columnPrefs.reducer;
diff --git a/src/utils/rowTemplateColumns.ts b/src/utils/rowTemplateColumns.ts
index 1caa4d4a1..cc29f3140 100644
--- a/src/utils/rowTemplateColumns.ts
+++ b/src/utils/rowTemplateColumns.ts
@@ -11,6 +11,8 @@ export {
 export const getColumnsConfiguration = (
   isSubtestTable: boolean,
   testVersion: TestVersion,
-): TableConfig => getColumnsForVersion(testVersion, isSubtestTable);
+  showAdvancedColumns: boolean,
+): TableConfig =>
+  getColumnsForVersion(testVersion, isSubtestTable, showAdvancedColumns);
 
 export { toGridTemplateColumns } from './gridTemplateColumns';

From c9e027f0e8e476157f435e299013dae50304d218 Mon Sep 17 00:00:00 2001
From: Carla Severe <csevere@mozilla.com>
Date: Thu, 23 Jul 2026 18:06:53 -0700
Subject: [PATCH 2/6] update tests to reflect new UI/UX

---
 .claude/settings.local.json                   |    3 +-
 src/__tests__/App.test.tsx                    |   11 +-
 .../CompareResults/ResultsTable.test.tsx      |  370 +++--
 .../CompareResults/RevisionRow.test.tsx       |   18 +-
 .../SubtestsResultsView.test.tsx              |  148 +-
 .../SubtestsRevisionRow.test.tsx              |   18 +-
 .../OverTimeResultsView.test.tsx.snap         |  282 +---
 .../__snapshots__/ResultsTable.test.tsx.snap  |  500 +++---
 .../__snapshots__/ResultsView.test.tsx.snap   |  296 ++--
 .../SubtestsResultsView.test.tsx.snap         | 1426 ++++-------------
 .../CompareOverTime.test.tsx.snap             |    8 +-
 .../CompareWithBase.test.tsx.snap             |   30 +-
 src/__tests__/utils/test-utils.tsx            |    9 +
 .../SubtestsResults/SubtestsResultsTable.tsx  |    6 +-
 14 files changed, 1115 insertions(+), 2010 deletions(-)

diff --git a/.claude/settings.local.json b/.claude/settings.local.json
index f3cdb7021..668c033d2 100644
--- a/.claude/settings.local.json
+++ b/.claude/settings.local.json
@@ -7,7 +7,8 @@
       "Bash(node:*)",
       "Bash(tail:*)",
       "Bash(git add src/components/CompareResults/SubtestsResults/SubtestsRevisionRow.tsx && git rebase --continue 2>&1)",
-      "Bash(grep:*)"
+      "Bash(grep:*)",
+      "Bash(npx jest *)"
     ]
   }
 }
diff --git a/src/__tests__/App.test.tsx b/src/__tests__/App.test.tsx
index a418178d9..1a2bc9587 100644
--- a/src/__tests__/App.test.tsx
+++ b/src/__tests__/App.test.tsx
@@ -396,11 +396,12 @@ describe('App', () => {
       // Wait for the page to load
       await screen.findByText('a11yr');
 
-      // Verify that Mann-Whitney-U specific columns are rendered
-      // (this indicates the testVersion defaulted to mann-whitney-u)
-      expect(screen.getByText('CD')).toBeInTheDocument();
-      expect(screen.getByText('Sig')).toBeInTheDocument();
-      expect(screen.getByText('CLES (%)')).toBeInTheDocument();
+      // Verify that Mann-Whitney-U specific columns are rendered in the
+      // default (simplified) view — "Difference Size" and "Δ Median %" are
+      // unique to the Mann-Whitney strategy, so their presence indicates the
+      // testVersion defaulted to mann-whitney-u.
+      expect(screen.getByText('Difference Size')).toBeInTheDocument();
+      expect(screen.getByText('Δ Median %')).toBeInTheDocument();
 
       // Verify the Stats Test Version dropdown shows Mann-Whitney-U as selected
       const testVersionDropdown = screen.getByRole('combobox', {
diff --git a/src/__tests__/CompareResults/ResultsTable.test.tsx b/src/__tests__/CompareResults/ResultsTable.test.tsx
index c663ada1d..dae55f633 100644
--- a/src/__tests__/CompareResults/ResultsTable.test.tsx
+++ b/src/__tests__/CompareResults/ResultsTable.test.tsx
@@ -14,7 +14,13 @@ import getTestData, {
   augmentCompareMannWhitneyDataWithSeveralRevisions,
   augmentCompareMannWhitneyDataWithSeveralTests,
 } from '../utils/fixtures';
-import { renderWithRouter, screen, waitFor, within } from '../utils/test-utils';
+import {
+  renderWithRouter,
+  screen,
+  waitFor,
+  within,
+  enableAdvancedColumns,
+} from '../utils/test-utils';
 
 function renderWithRoute(component: ReactElement, extraParameters?: string) {
   return renderWithRouter(component, {
@@ -48,7 +54,7 @@ function setupAndRender(
 // This handy function parses the results page and returns an array of visible
 // rows. It makes it easy to assert visible rows when filtering them in a
 // user-friendly way without using snapshots.
-function summarizeVisibleRows(testVersion?: TestVersion) {
+function summarizeVisibleRows(testVersion?: TestVersion, advanced = false) {
   const rowGroups = screen.getAllByRole('rowgroup');
   const result = [];
 
@@ -83,17 +89,33 @@ function summarizeVisibleRows(testVersion?: TestVersion) {
       for (const row of rows) {
         const rowClasses =
           testVersion === 'mann-whitney-u'
-            ? [
-                '.platform span',
-                '.median-diff',
-                '.status',
-                '.delta',
-                '.significance',
-                '.effects',
-              ]
+            ? advanced
+              ? [
+                  '.platform span',
+                  '.median-diff',
+                  '.status',
+                  '.delta',
+                  '.significance',
+                  '.effects',
+                ]
+              : [
+                  '.platform span',
+                  '.median-diff',
+                  '.status',
+                  '.difference-size',
+                ]
             : ['.platform span', '.status', '.delta', '.confidence'];
         const rowString = rowClasses
-          .map((selector) => row.querySelector(selector)?.textContent?.trim())
+          .map((selector) => {
+            const cell = row.querySelector(selector);
+            if (!cell) return undefined;
+            // Strip icon <title> text (e.g. the median-diff normality warning)
+            // so the data-focused expectations stay stable; icon presence is
+            // asserted separately.
+            const clone = cell.cloneNode(true) as HTMLElement;
+            clone.querySelectorAll('svg').forEach((svg) => svg.remove());
+            return clone.textContent?.trim();
+          })
           .join(', ');
 
         result.push('  - ' + rowString);
@@ -690,6 +712,13 @@ describe('Results Table', () => {
 });
 
 describe('Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion', () => {
+  // These tests exercise the full (advanced) table — CD, CLES, Sig columns and
+  // their sort/filter behavior. The simplified default view (which hides those
+  // and shows Difference Size) is covered separately below.
+  beforeEach(() => {
+    enableAdvancedColumns();
+  });
+
   it('Should match snapshot', async () => {
     const { testCompareMannWhitneyData } = getTestData();
 
@@ -719,12 +748,12 @@ describe('Results Table for MannWhitneyResultsItem for mann-whitney-u testVersio
 
     setupAndRender(simplerTestCompareData, 'test_version=mann-whitney-u');
     await screen.findByText('a11yr');
-    expect(summarizeVisibleRows('mann-whitney-u')).toEqual([
+    expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html opt e10s fission stylo webrender',
       '  rev: spam',
-      '  - macOS 10.15, 1.078 %, Improvement, 0.1, -, 25.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %',
       '  rev: devilrabbit',
-      '  - macOS 10.15, 1.078 %, Improvement, 0.1, -, 25.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %',
     ]);
     expect(screen.getByRole('rowgroup')).toMatchSnapshot();
   });
@@ -746,25 +775,25 @@ describe('Results Table for MannWhitneyResultsItem for mann-whitney-u testVersio
     setupAndRender(testCompareMannWhitneyData, 'test_version=mann-whitney-u');
 
     await screen.findByText('a11yr');
-    expect(summarizeVisibleRows('mann-whitney-u')).toEqual([
+    expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html spam opt e10s fission stylo webrender',
-      '  - Android, 1.078 %, Improvement, 0.1, -, 25.00 %',
-      '  - inexistant, 1.078 %, Improvement, 0.1, -, 25.00 %',
-      '  - Linux 18.04, 1.849 %, Regression, -, -, 45.00 %',
-      '  - macOS 10.15, 1.078 %, Improvement, 0.1, -, 25.00 %',
+      '  - Android, +1.08%, Improvement, 0.1, -, 25.00 %',
+      '  - inexistant, +1.08%, Improvement, 0.1, -, 25.00 %',
+      '  - Linux 18.04, +1.85%, Regression, -, -, 45.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %',
       '  - Windows 10, -, , -, , 100.00 %',
-      '  - Windows 10, -2.401 %, , -, , 50.00 %',
+      '  - Windows 10, -2.40%, , -, , 50.00 %',
     ]);
 
     expect(summarizeTableFiltersFromUrl()).toEqual({});
 
     const user = userEvent.setup({ advanceTimers: jest.advanceTimersByTime });
     await clickMenuItem(user, 'Platform', /Windows/);
-    expect(summarizeVisibleRows('mann-whitney-u')).toEqual([
+    expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html spam opt e10s fission stylo webrender',
-      '  - Android, 1.078 %, Improvement, 0.1, -, 25.00 %',
-      '  - Linux 18.04, 1.849 %, Regression, -, -, 45.00 %',
-      '  - macOS 10.15, 1.078 %, Improvement, 0.1, -, 25.00 %',
+      '  - Android, +1.08%, Improvement, 0.1, -, 25.00 %',
+      '  - Linux 18.04, +1.85%, Regression, -, -, 45.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %',
     ]);
     expect(summarizeTableFiltersFromUrl()).toEqual({
       platform: ['osx', 'linux', 'android', 'ios'],
@@ -773,78 +802,78 @@ describe('Results Table for MannWhitneyResultsItem for mann-whitney-u testVersio
     // Clicking Windows again should remove the search param and make the
     // "inexitant" platform visible again.
     await clickMenuItem(user, 'Platform', /Windows/);
-    expect(summarizeVisibleRows('mann-whitney-u')).toEqual([
+    expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html spam opt e10s fission stylo webrender',
-      '  - Android, 1.078 %, Improvement, 0.1, -, 25.00 %',
-      '  - inexistant, 1.078 %, Improvement, 0.1, -, 25.00 %',
-      '  - Linux 18.04, 1.849 %, Regression, -, -, 45.00 %',
-      '  - macOS 10.15, 1.078 %, Improvement, 0.1, -, 25.00 %',
+      '  - Android, +1.08%, Improvement, 0.1, -, 25.00 %',
+      '  - inexistant, +1.08%, Improvement, 0.1, -, 25.00 %',
+      '  - Linux 18.04, +1.85%, Regression, -, -, 45.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %',
       '  - Windows 10, -, , -, , 100.00 %',
-      '  - Windows 10, -2.401 %, , -, , 50.00 %',
+      '  - Windows 10, -2.40%, , -, , 50.00 %',
     ]);
     expect(summarizeTableFiltersFromUrl()).toEqual({});
 
     await clickMenuItem(user, 'Platform', /Windows/);
     await clickMenuItem(user, 'Platform', /Linux/);
-    expect(summarizeVisibleRows('mann-whitney-u')).toEqual([
+    expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html spam opt e10s fission stylo webrender',
-      '  - Android, 1.078 %, Improvement, 0.1, -, 25.00 %',
-      '  - macOS 10.15, 1.078 %, Improvement, 0.1, -, 25.00 %',
+      '  - Android, +1.08%, Improvement, 0.1, -, 25.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %',
     ]);
     expect(summarizeTableFiltersFromUrl()).toEqual({
       platform: ['osx', 'android', 'ios'],
     });
 
     await clickMenuItem(user, 'Platform', /Linux/);
-    expect(summarizeVisibleRows('mann-whitney-u')).toEqual([
+    expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html spam opt e10s fission stylo webrender',
-      '  - Android, 1.078 %, Improvement, 0.1, -, 25.00 %',
-      '  - Linux 18.04, 1.849 %, Regression, -, -, 45.00 %',
-      '  - macOS 10.15, 1.078 %, Improvement, 0.1, -, 25.00 %',
+      '  - Android, +1.08%, Improvement, 0.1, -, 25.00 %',
+      '  - Linux 18.04, +1.85%, Regression, -, -, 45.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %',
     ]);
     expect(summarizeTableFiltersFromUrl()).toEqual({
       platform: ['osx', 'android', 'ios', 'linux'],
     });
 
     await clickMenuItem(user, 'Platform', 'Select all values');
-    expect(summarizeVisibleRows('mann-whitney-u')).toEqual([
+    expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html spam opt e10s fission stylo webrender',
-      '  - Android, 1.078 %, Improvement, 0.1, -, 25.00 %',
-      '  - inexistant, 1.078 %, Improvement, 0.1, -, 25.00 %',
-      '  - Linux 18.04, 1.849 %, Regression, -, -, 45.00 %',
-      '  - macOS 10.15, 1.078 %, Improvement, 0.1, -, 25.00 %',
+      '  - Android, +1.08%, Improvement, 0.1, -, 25.00 %',
+      '  - inexistant, +1.08%, Improvement, 0.1, -, 25.00 %',
+      '  - Linux 18.04, +1.85%, Regression, -, -, 45.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %',
       '  - Windows 10, -, , -, , 100.00 %',
-      '  - Windows 10, -2.401 %, , -, , 50.00 %',
+      '  - Windows 10, -2.40%, , -, , 50.00 %',
     ]);
     expect(summarizeTableFiltersFromUrl()).toEqual({});
 
     await clickMenuItem(user, 'Platform', /macOS/);
-    expect(summarizeVisibleRows('mann-whitney-u')).toEqual([
+    expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html spam opt e10s fission stylo webrender',
-      '  - Android, 1.078 %, Improvement, 0.1, -, 25.00 %',
-      '  - Linux 18.04, 1.849 %, Regression, -, -, 45.00 %',
+      '  - Android, +1.08%, Improvement, 0.1, -, 25.00 %',
+      '  - Linux 18.04, +1.85%, Regression, -, -, 45.00 %',
       '  - Windows 10, -, , -, , 100.00 %',
-      '  - Windows 10, -2.401 %, , -, , 50.00 %',
+      '  - Windows 10, -2.40%, , -, , 50.00 %',
     ]);
     expect(summarizeTableFiltersFromUrl()).toEqual({
       platform: ['windows', 'linux', 'android', 'ios'],
     });
 
     await clickMenuItem(user, 'Platform', /Android/);
-    expect(summarizeVisibleRows('mann-whitney-u')).toEqual([
+    expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html spam opt e10s fission stylo webrender',
-      '  - Linux 18.04, 1.849 %, Regression, -, -, 45.00 %',
+      '  - Linux 18.04, +1.85%, Regression, -, -, 45.00 %',
       '  - Windows 10, -, , -, , 100.00 %',
-      '  - Windows 10, -2.401 %, , -, , 50.00 %',
+      '  - Windows 10, -2.40%, , -, , 50.00 %',
     ]);
     expect(summarizeTableFiltersFromUrl()).toEqual({
       platform: ['windows', 'linux', 'ios'],
     });
 
     await clickMenuItem(user, 'Platform', /Select only.*Android/);
-    expect(summarizeVisibleRows('mann-whitney-u')).toEqual([
+    expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html spam opt e10s fission stylo webrender',
-      '  - Android, 1.078 %, Improvement, 0.1, -, 25.00 %',
+      '  - Android, +1.08%, Improvement, 0.1, -, 25.00 %',
     ]);
     expect(summarizeTableFiltersFromUrl()).toEqual({
       platform: ['android'],
@@ -881,30 +910,30 @@ describe('Results Table for MannWhitneyResultsItem for mann-whitney-u testVersio
     setupAndRender(testCompareMannWhitneyData, 'test_version=mann-whitney-u');
 
     await screen.findByText('a11yr');
-    expect(summarizeVisibleRows('mann-whitney-u')).toEqual([
+    expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html spam opt e10s fission stylo webrender',
-      '  - Linux 18.04, 1.849 %, Regression, -, -, 45.00 %',
-      '  - macOS 10.15, 1.078 %, Improvement, 0.1, -, 25.00 %',
+      '  - Linux 18.04, +1.85%, Regression, -, -, 45.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %',
       '  - Windows 10, -, , -, , 100.00 %',
-      '  - Windows 10, -2.401 %, , -, , 50.00 %',
+      '  - Windows 10, -2.40%, , -, , 50.00 %',
     ]);
     expect(summarizeTableFiltersFromUrl()).toEqual({});
 
     const user = userEvent.setup({ advanceTimers: jest.advanceTimersByTime });
     await clickMenuItem(user, 'Status', /No changes/);
-    expect(summarizeVisibleRows('mann-whitney-u')).toEqual([
+    expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html spam opt e10s fission stylo webrender',
-      '  - Linux 18.04, 1.849 %, Regression, -, -, 45.00 %',
-      '  - macOS 10.15, 1.078 %, Improvement, 0.1, -, 25.00 %',
+      '  - Linux 18.04, +1.85%, Regression, -, -, 45.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %',
     ]);
     expect(summarizeTableFiltersFromUrl()).toEqual({
       status: ['improvement', 'regression'],
     });
 
     await clickMenuItem(user, 'Status', /Improvement/);
-    expect(summarizeVisibleRows('mann-whitney-u')).toEqual([
+    expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html spam opt e10s fission stylo webrender',
-      '  - Linux 18.04, 1.849 %, Regression, -, -, 45.00 %',
+      '  - Linux 18.04, +1.85%, Regression, -, -, 45.00 %',
     ]);
     expect(summarizeTableFiltersFromUrl()).toEqual({
       status: ['regression'],
@@ -912,39 +941,39 @@ describe('Results Table for MannWhitneyResultsItem for mann-whitney-u testVersio
 
     await clickMenuItem(user, 'Status', /Select all values/);
     await clickMenuItem(user, 'Status', /Regression/);
-    expect(summarizeVisibleRows('mann-whitney-u')).toEqual([
+    expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html spam opt e10s fission stylo webrender',
-      '  - macOS 10.15, 1.078 %, Improvement, 0.1, -, 25.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %',
       '  - Windows 10, -, , -, , 100.00 %',
-      '  - Windows 10, -2.401 %, , -, , 50.00 %',
+      '  - Windows 10, -2.40%, , -, , 50.00 %',
     ]);
     expect(summarizeTableFiltersFromUrl()).toEqual({
       status: ['none', 'improvement'],
     });
 
     await clickMenuItem(user, 'Status', /Regression/);
-    expect(summarizeVisibleRows('mann-whitney-u')).toEqual([
+    expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html spam opt e10s fission stylo webrender',
-      '  - Linux 18.04, 1.849 %, Regression, -, -, 45.00 %',
-      '  - macOS 10.15, 1.078 %, Improvement, 0.1, -, 25.00 %',
+      '  - Linux 18.04, +1.85%, Regression, -, -, 45.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %',
       '  - Windows 10, -, , -, , 100.00 %',
-      '  - Windows 10, -2.401 %, , -, , 50.00 %',
+      '  - Windows 10, -2.40%, , -, , 50.00 %',
     ]);
     expect(summarizeTableFiltersFromUrl()).toEqual({});
 
     await clickMenuItem(user, 'Status', /Select only.*Regression/);
-    expect(summarizeVisibleRows('mann-whitney-u')).toEqual([
+    expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html spam opt e10s fission stylo webrender',
-      '  - Linux 18.04, 1.849 %, Regression, -, -, 45.00 %',
+      '  - Linux 18.04, +1.85%, Regression, -, -, 45.00 %',
     ]);
     expect(summarizeTableFiltersFromUrl()).toEqual({
       status: ['regression'],
     });
 
     await clickMenuItem(user, 'Status', /Select only.*Improvement/);
-    expect(summarizeVisibleRows('mann-whitney-u')).toEqual([
+    expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html spam opt e10s fission stylo webrender',
-      '  - macOS 10.15, 1.078 %, Improvement, 0.1, -, 25.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %',
     ]);
     expect(summarizeTableFiltersFromUrl()).toEqual({
       status: ['improvement'],
@@ -959,9 +988,9 @@ describe('Results Table for MannWhitneyResultsItem for mann-whitney-u testVersio
     );
     await screen.findByText('dhtml.html');
 
-    expect(summarizeVisibleRows('mann-whitney-u')).toEqual([
+    expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html spam opt e10s fission stylo webrender',
-      '  - macOS 10.15, 1.078 %, Improvement, 0.1, -, 25.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %',
     ]);
     const user = userEvent.setup({ advanceTimers: jest.advanceTimersByTime });
     expect(await summarizeTableFiltersFromCheckboxes(user)).toEqual({
@@ -994,29 +1023,29 @@ describe('Results Table for MannWhitneyResultsItem for mann-whitney-u testVersio
     expect(deltaButton).toMatchSnapshot();
 
     // // Sort descending
-    expect(summarizeVisibleRows('mann-whitney-u')).toEqual([
+    expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr aria.html opt e10s fission stylo webrender',
       '  rev: spam',
-      '  - Linux 18.04, 1.849 %, Regression, 1.2, -, 44.00 %',
-      '  - macOS 10.15, 1.078 %, Improvement, 1.3, -, 24.00 %',
+      '  - Linux 18.04, +1.85%, Regression, 1.2, -, 44.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 1.3, -, 24.00 %',
       '  - Windows 10, -, , 1.2, , 99.00 %',
-      '  - Windows 10, -2.401 %, , 1.2, , 49.00 %',
+      '  - Windows 10, -2.40%, , 1.2, , 49.00 %',
       '  rev: tictactoe',
-      '  - Linux 18.04, 1.849 %, Regression, 2, -, 43.00 %',
-      '  - macOS 10.15, 1.078 %, Improvement, 2.1, -, 23.00 %',
+      '  - Linux 18.04, +1.85%, Regression, 2, -, 43.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 2.1, -, 23.00 %',
       '  - Windows 10, -, , 2, , 98.00 %',
-      '  - Windows 10, -2.401 %, , 2, , 48.00 %',
+      '  - Windows 10, -2.40%, , 2, , 48.00 %',
       'a11yr dhtml.html opt e10s fission stylo webrender',
       '  rev: spam',
-      '  - Linux 18.04, 1.849 %, Regression, -, -, 45.00 %',
-      '  - macOS 10.15, 1.078 %, Improvement, 0.1, -, 25.00 %',
+      '  - Linux 18.04, +1.85%, Regression, -, -, 45.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %',
       '  - Windows 10, -, , -, , 100.00 %',
-      '  - Windows 10, -2.401 %, , -, , 50.00 %',
+      '  - Windows 10, -2.40%, , -, , 50.00 %',
       '  rev: tictactoe',
-      '  - Linux 18.04, 1.849 %, Regression, 0.8, -, 44.00 %',
-      '  - macOS 10.15, 1.078 %, Improvement, 0.9, -, 24.00 %',
+      '  - Linux 18.04, +1.85%, Regression, 0.8, -, 44.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.9, -, 24.00 %',
       '  - Windows 10, -, , 0.8, , 99.00 %',
-      '  - Windows 10, -2.401 %, , 0.8, , 49.00 %',
+      '  - Windows 10, -2.40%, , 0.8, , 49.00 %',
     ]);
     // It should have the "descending" SVG.
     expect(deltaButton).toMatchSnapshot();
@@ -1025,28 +1054,28 @@ describe('Results Table for MannWhitneyResultsItem for mann-whitney-u testVersio
 
     // sort ascending
     await user.click(deltaButton);
-    expect(summarizeVisibleRows('mann-whitney-u')).toEqual([
+    expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr aria.html opt e10s fission stylo webrender',
       '  rev: tictactoe',
-      '  - macOS 10.15, 1.078 %, Improvement, 2.1, -, 23.00 %',
-      '  - Linux 18.04, 1.849 %, Regression, 2, -, 43.00 %',
-      '  - Windows 10, -2.401 %, , 2, , 48.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 2.1, -, 23.00 %',
+      '  - Linux 18.04, +1.85%, Regression, 2, -, 43.00 %',
+      '  - Windows 10, -2.40%, , 2, , 48.00 %',
       '  - Windows 10, -, , 2, , 98.00 %',
       '  rev: spam',
-      '  - macOS 10.15, 1.078 %, Improvement, 1.3, -, 24.00 %',
-      '  - Linux 18.04, 1.849 %, Regression, 1.2, -, 44.00 %',
-      '  - Windows 10, -2.401 %, , 1.2, , 49.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 1.3, -, 24.00 %',
+      '  - Linux 18.04, +1.85%, Regression, 1.2, -, 44.00 %',
+      '  - Windows 10, -2.40%, , 1.2, , 49.00 %',
       '  - Windows 10, -, , 1.2, , 99.00 %',
       'a11yr dhtml.html opt e10s fission stylo webrender',
       '  rev: tictactoe',
-      '  - macOS 10.15, 1.078 %, Improvement, 0.9, -, 24.00 %',
-      '  - Linux 18.04, 1.849 %, Regression, 0.8, -, 44.00 %',
-      '  - Windows 10, -2.401 %, , 0.8, , 49.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.9, -, 24.00 %',
+      '  - Linux 18.04, +1.85%, Regression, 0.8, -, 44.00 %',
+      '  - Windows 10, -2.40%, , 0.8, , 49.00 %',
       '  - Windows 10, -, , 0.8, , 99.00 %',
       '  rev: spam',
-      '  - macOS 10.15, 1.078 %, Improvement, 0.1, -, 25.00 %',
-      '  - Linux 18.04, 1.849 %, Regression, -, -, 45.00 %',
-      '  - Windows 10, -2.401 %, , -, , 50.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %',
+      '  - Linux 18.04, +1.85%, Regression, -, -, 45.00 %',
+      '  - Windows 10, -2.40%, , -, , 50.00 %',
       '  - Windows 10, -, , -, , 100.00 %',
     ]);
     // It should have the "ascending" SVG.
@@ -1059,29 +1088,29 @@ describe('Results Table for MannWhitneyResultsItem for mann-whitney-u testVersio
       name: /Sig.*sort/,
     });
     await user.click(significanceButton);
-    expect(summarizeVisibleRows('mann-whitney-u')).toEqual([
+    expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr aria.html opt e10s fission stylo webrender',
       '  rev: tictactoe',
-      '  - macOS 10.15, 1.078 %, Improvement, 2.1, -, 23.00 %',
-      '  - Linux 18.04, 1.849 %, Regression, 2, -, 43.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 2.1, -, 23.00 %',
+      '  - Linux 18.04, +1.85%, Regression, 2, -, 43.00 %',
       '  - Windows 10, -, , 2, , 98.00 %',
-      '  - Windows 10, -2.401 %, , 2, , 48.00 %',
+      '  - Windows 10, -2.40%, , 2, , 48.00 %',
       '  rev: spam',
-      '  - macOS 10.15, 1.078 %, Improvement, 1.3, -, 24.00 %',
-      '  - Linux 18.04, 1.849 %, Regression, 1.2, -, 44.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 1.3, -, 24.00 %',
+      '  - Linux 18.04, +1.85%, Regression, 1.2, -, 44.00 %',
       '  - Windows 10, -, , 1.2, , 99.00 %',
-      '  - Windows 10, -2.401 %, , 1.2, , 49.00 %',
+      '  - Windows 10, -2.40%, , 1.2, , 49.00 %',
       'a11yr dhtml.html opt e10s fission stylo webrender',
       '  rev: tictactoe',
-      '  - macOS 10.15, 1.078 %, Improvement, 0.9, -, 24.00 %',
-      '  - Linux 18.04, 1.849 %, Regression, 0.8, -, 44.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.9, -, 24.00 %',
+      '  - Linux 18.04, +1.85%, Regression, 0.8, -, 44.00 %',
       '  - Windows 10, -, , 0.8, , 99.00 %',
-      '  - Windows 10, -2.401 %, , 0.8, , 49.00 %',
+      '  - Windows 10, -2.40%, , 0.8, , 49.00 %',
       '  rev: spam',
-      '  - macOS 10.15, 1.078 %, Improvement, 0.1, -, 25.00 %',
-      '  - Linux 18.04, 1.849 %, Regression, -, -, 45.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %',
+      '  - Linux 18.04, +1.85%, Regression, -, -, 45.00 %',
       '  - Windows 10, -, , -, , 100.00 %',
-      '  - Windows 10, -2.401 %, , -, , 50.00 %',
+      '  - Windows 10, -2.40%, , -, , 50.00 %',
     ]);
     // It should have the "descending" SVG.
     expect(significanceButton).toMatchSnapshot();
@@ -1090,29 +1119,29 @@ describe('Results Table for MannWhitneyResultsItem for mann-whitney-u testVersio
 
     // Sort by Significance ascending
     await user.click(significanceButton);
-    expect(summarizeVisibleRows('mann-whitney-u')).toEqual([
+    expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html opt e10s fission stylo webrender',
       '  rev: spam',
-      '  - Windows 10, -2.401 %, , -, , 50.00 %',
+      '  - Windows 10, -2.40%, , -, , 50.00 %',
       '  - Windows 10, -, , -, , 100.00 %',
-      '  - macOS 10.15, 1.078 %, Improvement, 0.1, -, 25.00 %',
-      '  - Linux 18.04, 1.849 %, Regression, -, -, 45.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %',
+      '  - Linux 18.04, +1.85%, Regression, -, -, 45.00 %',
       '  rev: tictactoe',
-      '  - Windows 10, -2.401 %, , 0.8, , 49.00 %',
+      '  - Windows 10, -2.40%, , 0.8, , 49.00 %',
       '  - Windows 10, -, , 0.8, , 99.00 %',
-      '  - macOS 10.15, 1.078 %, Improvement, 0.9, -, 24.00 %',
-      '  - Linux 18.04, 1.849 %, Regression, 0.8, -, 44.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.9, -, 24.00 %',
+      '  - Linux 18.04, +1.85%, Regression, 0.8, -, 44.00 %',
       'a11yr aria.html opt e10s fission stylo webrender',
       '  rev: spam',
-      '  - Windows 10, -2.401 %, , 1.2, , 49.00 %',
+      '  - Windows 10, -2.40%, , 1.2, , 49.00 %',
       '  - Windows 10, -, , 1.2, , 99.00 %',
-      '  - macOS 10.15, 1.078 %, Improvement, 1.3, -, 24.00 %',
-      '  - Linux 18.04, 1.849 %, Regression, 1.2, -, 44.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 1.3, -, 24.00 %',
+      '  - Linux 18.04, +1.85%, Regression, 1.2, -, 44.00 %',
       '  rev: tictactoe',
-      '  - Windows 10, -2.401 %, , 2, , 48.00 %',
+      '  - Windows 10, -2.40%, , 2, , 48.00 %',
       '  - Windows 10, -, , 2, , 98.00 %',
-      '  - macOS 10.15, 1.078 %, Improvement, 2.1, -, 23.00 %',
-      '  - Linux 18.04, 1.849 %, Regression, 2, -, 43.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 2.1, -, 23.00 %',
+      '  - Linux 18.04, +1.85%, Regression, 2, -, 43.00 %',
     ]);
     // It should have the "descending" SVG.
     expect(significanceButton).toMatchSnapshot();
@@ -1121,32 +1150,32 @@ describe('Results Table for MannWhitneyResultsItem for mann-whitney-u testVersio
 
     // Sort by Effect Size (%) descending
     const effectSizeButton = screen.getByRole('button', {
-      name: /CLES \(%\).*sort/,
+      name: /CLES %.*sort/,
     });
     await user.click(effectSizeButton);
-    expect(summarizeVisibleRows('mann-whitney-u')).toEqual([
+    expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html opt e10s fission stylo webrender',
       '  rev: spam',
       '  - Windows 10, -, , -, , 100.00 %',
-      '  - macOS 10.15, 1.078 %, Improvement, 0.1, -, 25.00 %',
-      '  - Linux 18.04, 1.849 %, Regression, -, -, 45.00 %',
-      '  - Windows 10, -2.401 %, , -, , 50.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %',
+      '  - Linux 18.04, +1.85%, Regression, -, -, 45.00 %',
+      '  - Windows 10, -2.40%, , -, , 50.00 %',
       '  rev: tictactoe',
       '  - Windows 10, -, , 0.8, , 99.00 %',
-      '  - macOS 10.15, 1.078 %, Improvement, 0.9, -, 24.00 %',
-      '  - Linux 18.04, 1.849 %, Regression, 0.8, -, 44.00 %',
-      '  - Windows 10, -2.401 %, , 0.8, , 49.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.9, -, 24.00 %',
+      '  - Linux 18.04, +1.85%, Regression, 0.8, -, 44.00 %',
+      '  - Windows 10, -2.40%, , 0.8, , 49.00 %',
       'a11yr aria.html opt e10s fission stylo webrender',
       '  rev: spam',
       '  - Windows 10, -, , 1.2, , 99.00 %',
-      '  - macOS 10.15, 1.078 %, Improvement, 1.3, -, 24.00 %',
-      '  - Linux 18.04, 1.849 %, Regression, 1.2, -, 44.00 %',
-      '  - Windows 10, -2.401 %, , 1.2, , 49.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 1.3, -, 24.00 %',
+      '  - Linux 18.04, +1.85%, Regression, 1.2, -, 44.00 %',
+      '  - Windows 10, -2.40%, , 1.2, , 49.00 %',
       '  rev: tictactoe',
       '  - Windows 10, -, , 2, , 98.00 %',
-      '  - macOS 10.15, 1.078 %, Improvement, 2.1, -, 23.00 %',
-      '  - Linux 18.04, 1.849 %, Regression, 2, -, 43.00 %',
-      '  - Windows 10, -2.401 %, , 2, , 48.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 2.1, -, 23.00 %',
+      '  - Linux 18.04, +1.85%, Regression, 2, -, 43.00 %',
+      '  - Windows 10, -2.40%, , 2, , 48.00 %',
     ]);
 
     expect(effectSizeButton).toMatchSnapshot();
@@ -1155,46 +1184,46 @@ describe('Results Table for MannWhitneyResultsItem for mann-whitney-u testVersio
 
     // Sort by Effect Size (%) ascending
     await user.click(effectSizeButton);
-    expect(summarizeVisibleRows('mann-whitney-u')).toEqual([
+    expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html opt e10s fission stylo webrender',
       '  rev: spam',
-      '  - Windows 10, -2.401 %, , -, , 50.00 %',
-      '  - Linux 18.04, 1.849 %, Regression, -, -, 45.00 %',
-      '  - macOS 10.15, 1.078 %, Improvement, 0.1, -, 25.00 %',
+      '  - Windows 10, -2.40%, , -, , 50.00 %',
+      '  - Linux 18.04, +1.85%, Regression, -, -, 45.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %',
       '  - Windows 10, -, , -, , 100.00 %',
       '  rev: tictactoe',
-      '  - Windows 10, -2.401 %, , 0.8, , 49.00 %',
-      '  - Linux 18.04, 1.849 %, Regression, 0.8, -, 44.00 %',
-      '  - macOS 10.15, 1.078 %, Improvement, 0.9, -, 24.00 %',
+      '  - Windows 10, -2.40%, , 0.8, , 49.00 %',
+      '  - Linux 18.04, +1.85%, Regression, 0.8, -, 44.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.9, -, 24.00 %',
       '  - Windows 10, -, , 0.8, , 99.00 %',
       'a11yr aria.html opt e10s fission stylo webrender',
       '  rev: spam',
-      '  - Windows 10, -2.401 %, , 1.2, , 49.00 %',
-      '  - Linux 18.04, 1.849 %, Regression, 1.2, -, 44.00 %',
-      '  - macOS 10.15, 1.078 %, Improvement, 1.3, -, 24.00 %',
+      '  - Windows 10, -2.40%, , 1.2, , 49.00 %',
+      '  - Linux 18.04, +1.85%, Regression, 1.2, -, 44.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 1.3, -, 24.00 %',
       '  - Windows 10, -, , 1.2, , 99.00 %',
       '  rev: tictactoe',
-      '  - Windows 10, -2.401 %, , 2, , 48.00 %',
-      '  - Linux 18.04, 1.849 %, Regression, 2, -, 43.00 %',
-      '  - macOS 10.15, 1.078 %, Improvement, 2.1, -, 23.00 %',
+      '  - Windows 10, -2.40%, , 2, , 48.00 %',
+      '  - Linux 18.04, +1.85%, Regression, 2, -, 43.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 2.1, -, 23.00 %',
       '  - Windows 10, -, , 2, , 98.00 %',
     ]);
     expect(effectSizeButton).toMatchSnapshot();
     // It should be persisted in the URL
     expectParameterToHaveValue('sort', 'effects|asc');
 
-    // Sort by MD(%) descending
+    // Sort by Δ Median % descending
     const medianDiffButton = screen.getByRole('button', {
-      name: /MD \(%\).*sort/,
+      name: /Δ Median %.*sort/,
     });
     await user.click(medianDiffButton);
-    expect(summarizeVisibleRows('mann-whitney-u')).toMatchSnapshot();
+    expect(summarizeVisibleRows('mann-whitney-u', true)).toMatchSnapshot();
     expect(medianDiffButton).toMatchSnapshot();
     expectParameterToHaveValue('sort', 'median-diff|desc');
 
     // Sort by MD(%) ascending
     await user.click(medianDiffButton);
-    expect(summarizeVisibleRows('mann-whitney-u')).toMatchSnapshot();
+    expect(summarizeVisibleRows('mann-whitney-u', true)).toMatchSnapshot();
     expect(medianDiffButton).toMatchSnapshot();
     expectParameterToHaveValue('sort', 'median-diff|asc');
   });
@@ -1248,3 +1277,30 @@ describe('Results Table for MannWhitneyResultsItem for mann-whitney-u testVersio
     });
   });
 });
+
+describe('Advanced-columns toggle for mann-whitney-u testVersion', () => {
+  it('shows Difference Size and hides CD/CLES/Sig in the simplified (default) view', async () => {
+    const { testCompareMannWhitneyData } = getTestData();
+    setupAndRender(testCompareMannWhitneyData, 'test_version=mann-whitney-u');
+    await screen.findByText('a11yr');
+
+    const header = screen.getByTestId('table-header');
+    expect(header.querySelector('.difference-size-header')).toBeTruthy();
+    expect(header.querySelector('.delta-header')).toBeFalsy();
+    expect(header.querySelector('.effects-header')).toBeFalsy();
+    expect(header.querySelector('.significance-header')).toBeFalsy();
+  });
+
+  it('shows CD/CLES/Sig and hides Difference Size when advanced columns are enabled', async () => {
+    enableAdvancedColumns();
+    const { testCompareMannWhitneyData } = getTestData();
+    setupAndRender(testCompareMannWhitneyData, 'test_version=mann-whitney-u');
+    await screen.findByText('a11yr');
+
+    const header = screen.getByTestId('table-header');
+    expect(header.querySelector('.delta-header')).toBeTruthy();
+    expect(header.querySelector('.effects-header')).toBeTruthy();
+    expect(header.querySelector('.significance-header')).toBeTruthy();
+    expect(header.querySelector('.difference-size-header')).toBeFalsy();
+  });
+});
diff --git a/src/__tests__/CompareResults/RevisionRow.test.tsx b/src/__tests__/CompareResults/RevisionRow.test.tsx
index ae86e4950..6f542eab5 100644
--- a/src/__tests__/CompareResults/RevisionRow.test.tsx
+++ b/src/__tests__/CompareResults/RevisionRow.test.tsx
@@ -11,7 +11,11 @@ import { useSubtestRegressionCount } from '../../hooks/useSubtestRegressionCount
 import { CompareResultsItem, MannWhitneyResultsItem } from '../../types/state';
 import { Platform } from '../../types/types';
 import getTestData from '../utils/fixtures';
-import { screen, renderWithRouter } from '../utils/test-utils';
+import {
+  screen,
+  renderWithRouter,
+  enableAdvancedColumns,
+} from '../utils/test-utils';
 
 jest.mock('../../hooks/useSubtestRegressionCount');
 const mockUseSubtestRegressionCount = useSubtestRegressionCount as jest.Mock;
@@ -427,6 +431,7 @@ describe('Expanded row', () => {
   });
 
   it('should display mean for base or new in row headers for mann-whitney-u testVersion', async () => {
+    enableAdvancedColumns();
     const { testCompareMannWhitneyData: rowData } = getTestData();
     renderWithRoute(
       <RevisionRow
@@ -541,7 +546,7 @@ describe('Expanded row', () => {
       };
     }
 
-    it('shows dash when neither distribution is normal', async () => {
+    it('shows value with warning icon when neither distribution is normal', async () => {
       const result = makeResult(tooFewRuns, tooFewRuns);
       expect(isDistributionNormal(result)).toBe(false);
       renderWithRoute(
@@ -555,7 +560,10 @@ describe('Expanded row', () => {
         />,
       );
       const roles = await screen.findAllByRole('cell');
-      expect(roles[4]).toHaveTextContent('-');
+      // The median difference is rank-based, so it's shown even for non-normal
+      // data; only a warning icon flags the shape.
+      expect(roles[4]).toHaveTextContent('%');
+      expect(roles[4].querySelector('svg[role="img"]')).toBeTruthy();
     });
 
     it('shows value with warning icon when only one distribution is normal', async () => {
@@ -572,7 +580,7 @@ describe('Expanded row', () => {
         />,
       );
       const roles = await screen.findAllByRole('cell');
-      expect(roles[4]).not.toHaveTextContent('-');
+      expect(roles[4]).toHaveTextContent('%');
       expect(roles[4].querySelector('svg[role="img"]')).toBeTruthy();
     });
 
@@ -590,7 +598,7 @@ describe('Expanded row', () => {
         />,
       );
       const roles = await screen.findAllByRole('cell');
-      expect(roles[4]).not.toHaveTextContent('-');
+      expect(roles[4]).toHaveTextContent('%');
       expect(roles[4].querySelector('svg[role="img"]')).toBeFalsy();
     });
   });
diff --git a/src/__tests__/CompareResults/SubtestsResultsView.test.tsx b/src/__tests__/CompareResults/SubtestsResultsView.test.tsx
index 87e1b9081..522c3b35c 100644
--- a/src/__tests__/CompareResults/SubtestsResultsView.test.tsx
+++ b/src/__tests__/CompareResults/SubtestsResultsView.test.tsx
@@ -10,7 +10,11 @@ import type { CombinedResultsItemType } from '../../types/state';
 import { TestVersion } from '../../types/types';
 import { getLocationOrigin } from '../../utils/location';
 import getTestData from '../utils/fixtures';
-import { renderWithRouter, screen } from '../utils/test-utils';
+import {
+  renderWithRouter,
+  screen,
+  enableAdvancedColumns,
+} from '../utils/test-utils';
 
 jest.mock('../../utils/location');
 const mockedGetLocationOrigin = getLocationOrigin as jest.Mock;
@@ -48,7 +52,7 @@ const setup = ({
 // This handy function parses the results page and returns an array of visible
 // rows. It makes it easy to assert visible rows when filtering them in a
 // user-friendly way without using snapshots.
-function summarizeVisibleRows(testVersion?: TestVersion) {
+function summarizeVisibleRows(testVersion?: TestVersion, advanced = false) {
   const rows = screen.getAllByRole('row');
   const result = [];
   for (const row of rows) {
@@ -59,10 +63,19 @@ function summarizeVisibleRows(testVersion?: TestVersion) {
     }
     const rowClasses =
       testVersion === 'mann-whitney-u'
-        ? ['.median-diff', '.delta', '.significance', '.effects']
+        ? advanced
+          ? ['.median-diff', '.delta', '.significance', '.effects']
+          : ['.median-diff', '.status', '.difference-size']
         : ['.delta', '.confidence'];
     const rowString = rowClasses
-      .map((selector) => row.querySelector(selector)?.textContent.trim())
+      .map((selector) => {
+        const cell = row.querySelector(selector);
+        if (!cell) return undefined;
+        // Strip icon <title> text (e.g. the median-diff normality warning).
+        const clone = cell.cloneNode(true) as HTMLElement;
+        clone.querySelectorAll('svg').forEach((svg) => svg.remove());
+        return clone.textContent?.trim();
+      })
       .join(', ');
     result.push(`${subtest}: ${rowString}`);
   }
@@ -499,6 +512,11 @@ describe('SubtestsResultsView Component Tests for mann-whitney-u testVersion', (
   });
 
   describe('table sorting', () => {
+    // These sort by CD and Significance, which are advanced-only columns.
+    beforeEach(() => {
+      enableAdvancedColumns();
+    });
+
     async function setupForSorting({
       extraParameters,
     }: Partial<{
@@ -526,12 +544,12 @@ describe('SubtestsResultsView Component Tests for mann-whitney-u testVersion', (
     it('can sort the table and persist the information to the URL of mann-whitney-u values', async () => {
       await setupForSorting();
       // Initial view (alphabetical ordered, even if "sort by subtests" isn't specified
-      expect(summarizeVisibleRows('mann-whitney-u')).toEqual([
-        'browser.html: 0.963 %, -0.04, -, 15.00%',
-        'dhtml.html: 1.135 %, 0.02, , 60.00%',
-        'improvement.html: 0.963 %, -0.05, , 50.00%',
-        'regression.html: 1.135 %, 0.12, , 25.00%',
-        'tablemutation.html: 0.98 %, 0.01, -, 45.00%',
+      expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
+        'browser.html: +1.14%, -0.04, -, 15.00%',
+        'dhtml.html: +1.14%, 0.02, , 60.00%',
+        'improvement.html: +1.14%, -0.05, , 50.00%',
+        'regression.html: +1.14%, 0.12, , 25.00%',
+        'tablemutation.html: +0.98%, 0.01, -, 45.00%',
       ]);
 
       // Sort by Delta
@@ -541,12 +559,12 @@ describe('SubtestsResultsView Component Tests for mann-whitney-u testVersion', (
       expect(window.location.search).not.toContain('sort=');
       // Sort descending
       await user.click(deltaButton);
-      expect(summarizeVisibleRows('mann-whitney-u')).toEqual([
-        'regression.html: 1.135 %, 0.12, , 25.00%',
-        'improvement.html: 0.963 %, -0.05, , 50.00%',
-        'browser.html: 0.963 %, -0.04, -, 15.00%',
-        'dhtml.html: 1.135 %, 0.02, , 60.00%',
-        'tablemutation.html: 0.98 %, 0.01, -, 45.00%',
+      expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
+        'regression.html: +1.14%, 0.12, , 25.00%',
+        'improvement.html: +1.14%, -0.05, , 50.00%',
+        'browser.html: +1.14%, -0.04, -, 15.00%',
+        'dhtml.html: +1.14%, 0.02, , 60.00%',
+        'tablemutation.html: +0.98%, 0.01, -, 45.00%',
       ]);
 
       // It should have the "descending" SVG.
@@ -556,12 +574,12 @@ describe('SubtestsResultsView Component Tests for mann-whitney-u testVersion', (
 
       // Sort ascending
       await user.click(deltaButton);
-      expect(summarizeVisibleRows('mann-whitney-u')).toEqual([
-        'tablemutation.html: 0.98 %, 0.01, -, 45.00%',
-        'dhtml.html: 1.135 %, 0.02, , 60.00%',
-        'browser.html: 0.963 %, -0.04, -, 15.00%',
-        'improvement.html: 0.963 %, -0.05, , 50.00%',
-        'regression.html: 1.135 %, 0.12, , 25.00%',
+      expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
+        'tablemutation.html: +0.98%, 0.01, -, 45.00%',
+        'dhtml.html: +1.14%, 0.02, , 60.00%',
+        'browser.html: +1.14%, -0.04, -, 15.00%',
+        'improvement.html: +1.14%, -0.05, , 50.00%',
+        'regression.html: +1.14%, 0.12, , 25.00%',
       ]);
       // It should have the "ascending" SVG.
       expect(deltaButton).toMatchSnapshot();
@@ -573,12 +591,12 @@ describe('SubtestsResultsView Component Tests for mann-whitney-u testVersion', (
         name: /Sig.*sort/,
       });
       await user.click(significanceButton);
-      expect(summarizeVisibleRows('mann-whitney-u')).toEqual([
-        'browser.html: 0.963 %, -0.04, -, 15.00%',
-        'tablemutation.html: 0.98 %, 0.01, -, 45.00%',
-        'dhtml.html: 1.135 %, 0.02, , 60.00%',
-        'regression.html: 1.135 %, 0.12, , 25.00%',
-        'improvement.html: 0.963 %, -0.05, , 50.00%',
+      expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
+        'browser.html: +1.14%, -0.04, -, 15.00%',
+        'tablemutation.html: +0.98%, 0.01, -, 45.00%',
+        'dhtml.html: +1.14%, 0.02, , 60.00%',
+        'regression.html: +1.14%, 0.12, , 25.00%',
+        'improvement.html: +1.14%, -0.05, , 50.00%',
       ]);
       // It should have the "no sort" SVG.
       expect(deltaButton).toMatchSnapshot();
@@ -589,26 +607,26 @@ describe('SubtestsResultsView Component Tests for mann-whitney-u testVersion', (
 
       // Sort by Significance ascending
       await user.click(significanceButton);
-      expect(summarizeVisibleRows('mann-whitney-u')).toEqual([
-        'improvement.html: 0.963 %, -0.05, , 50.00%',
-        'regression.html: 1.135 %, 0.12, , 25.00%',
-        'dhtml.html: 1.135 %, 0.02, , 60.00%',
-        'tablemutation.html: 0.98 %, 0.01, -, 45.00%',
-        'browser.html: 0.963 %, -0.04, -, 15.00%',
+      expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
+        'improvement.html: +1.14%, -0.05, , 50.00%',
+        'regression.html: +1.14%, 0.12, , 25.00%',
+        'dhtml.html: +1.14%, 0.02, , 60.00%',
+        'tablemutation.html: +0.98%, 0.01, -, 45.00%',
+        'browser.html: +1.14%, -0.04, -, 15.00%',
       ]);
       expectParameterToHaveValue('sort', 'significance|asc');
 
       // Sort by Effect Size descending
       const effectButton = screen.getByRole('button', {
-        name: /CLES \(%\).*sort/,
+        name: /CLES %.*sort/,
       });
       await user.click(effectButton);
-      expect(summarizeVisibleRows('mann-whitney-u')).toEqual([
-        'browser.html: 0.963 %, -0.04, -, 15.00%',
-        'regression.html: 1.135 %, 0.12, , 25.00%',
-        'dhtml.html: 1.135 %, 0.02, , 60.00%',
-        'tablemutation.html: 0.98 %, 0.01, -, 45.00%',
-        'improvement.html: 0.963 %, -0.05, , 50.00%',
+      expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
+        'browser.html: +1.14%, -0.04, -, 15.00%',
+        'regression.html: +1.14%, 0.12, , 25.00%',
+        'dhtml.html: +1.14%, 0.02, , 60.00%',
+        'tablemutation.html: +0.98%, 0.01, -, 45.00%',
+        'improvement.html: +1.14%, -0.05, , 50.00%',
       ]);
 
       // It should have the "descending" SVG.
@@ -618,12 +636,12 @@ describe('SubtestsResultsView Component Tests for mann-whitney-u testVersion', (
 
       // Sort by Effect Size ascending
       await user.click(effectButton);
-      expect(summarizeVisibleRows('mann-whitney-u')).toEqual([
-        'improvement.html: 0.963 %, -0.05, , 50.00%',
-        'tablemutation.html: 0.98 %, 0.01, -, 45.00%',
-        'dhtml.html: 1.135 %, 0.02, , 60.00%',
-        'regression.html: 1.135 %, 0.12, , 25.00%',
-        'browser.html: 0.963 %, -0.04, -, 15.00%',
+      expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
+        'improvement.html: +1.14%, -0.05, , 50.00%',
+        'tablemutation.html: +0.98%, 0.01, -, 45.00%',
+        'dhtml.html: +1.14%, 0.02, , 60.00%',
+        'regression.html: +1.14%, 0.12, , 25.00%',
+        'browser.html: +1.14%, -0.04, -, 15.00%',
       ]);
       expectParameterToHaveValue('sort', 'effects|asc');
     });
@@ -631,12 +649,12 @@ describe('SubtestsResultsView Component Tests for mann-whitney-u testVersion', (
     it('initializes the sort from the URL at load time for an ascending sort', async () => {
       await setupForSorting({ extraParameters: 'sort=delta|asc' });
       await screen.findByText('dhtml.html');
-      expect(summarizeVisibleRows('mann-whitney-u')).toEqual([
-        'tablemutation.html: 0.98 %, 0.01, -, 45.00%',
-        'dhtml.html: 1.135 %, 0.02, , 60.00%',
-        'browser.html: 0.963 %, -0.04, -, 15.00%',
-        'improvement.html: 0.963 %, -0.05, , 50.00%',
-        'regression.html: 1.135 %, 0.12, , 25.00%',
+      expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
+        'tablemutation.html: +0.98%, 0.01, -, 45.00%',
+        'dhtml.html: +1.14%, 0.02, , 60.00%',
+        'browser.html: +1.14%, -0.04, -, 15.00%',
+        'improvement.html: +1.14%, -0.05, , 50.00%',
+        'regression.html: +1.14%, 0.12, , 25.00%',
       ]);
       // It should have the "ascending" SVG.
       expect(screen.getByRole('button', { name: /CD/ })).toMatchSnapshot();
@@ -645,12 +663,12 @@ describe('SubtestsResultsView Component Tests for mann-whitney-u testVersion', (
     it('initializes the sort from the URL at load time for an implicit descending sort', async () => {
       await setupForSorting({ extraParameters: 'sort=delta' });
       await screen.findByText('dhtml.html');
-      expect(summarizeVisibleRows('mann-whitney-u')).toEqual([
-        'regression.html: 1.135 %, 0.12, , 25.00%',
-        'improvement.html: 0.963 %, -0.05, , 50.00%',
-        'browser.html: 0.963 %, -0.04, -, 15.00%',
-        'dhtml.html: 1.135 %, 0.02, , 60.00%',
-        'tablemutation.html: 0.98 %, 0.01, -, 45.00%',
+      expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
+        'regression.html: +1.14%, 0.12, , 25.00%',
+        'improvement.html: +1.14%, -0.05, , 50.00%',
+        'browser.html: +1.14%, -0.04, -, 15.00%',
+        'dhtml.html: +1.14%, 0.02, , 60.00%',
+        'tablemutation.html: +0.98%, 0.01, -, 45.00%',
       ]);
       // It should have the "descending" SVG.
       expect(screen.getByRole('button', { name: /CD/ })).toMatchSnapshot();
@@ -658,12 +676,12 @@ describe('SubtestsResultsView Component Tests for mann-whitney-u testVersion', (
 
     it('initializes the sort from the URL at load time for a descending sort', async () => {
       await setupForSorting({ extraParameters: 'sort=delta|desc' });
-      expect(summarizeVisibleRows('mann-whitney-u')).toEqual([
-        'regression.html: 1.135 %, 0.12, , 25.00%',
-        'improvement.html: 0.963 %, -0.05, , 50.00%',
-        'browser.html: 0.963 %, -0.04, -, 15.00%',
-        'dhtml.html: 1.135 %, 0.02, , 60.00%',
-        'tablemutation.html: 0.98 %, 0.01, -, 45.00%',
+      expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
+        'regression.html: +1.14%, 0.12, , 25.00%',
+        'improvement.html: +1.14%, -0.05, , 50.00%',
+        'browser.html: +1.14%, -0.04, -, 15.00%',
+        'dhtml.html: +1.14%, 0.02, , 60.00%',
+        'tablemutation.html: +0.98%, 0.01, -, 45.00%',
       ]);
       // It should have the "descending" SVG.
       expect(screen.getByRole('button', { name: /CD/ })).toMatchSnapshot();
diff --git a/src/__tests__/CompareResults/SubtestsRevisionRow.test.tsx b/src/__tests__/CompareResults/SubtestsRevisionRow.test.tsx
index d8941e030..f3f3fe330 100644
--- a/src/__tests__/CompareResults/SubtestsRevisionRow.test.tsx
+++ b/src/__tests__/CompareResults/SubtestsRevisionRow.test.tsx
@@ -7,7 +7,11 @@ import { loader } from '../../components/CompareResults/loader';
 import SubtestsRevisionRow from '../../components/CompareResults/SubtestsResults/SubtestsRevisionRow';
 import { MannWhitneyResultsItem } from '../../types/state';
 import getTestData from '../utils/fixtures';
-import { screen, renderWithRouter } from '../utils/test-utils';
+import {
+  screen,
+  renderWithRouter,
+  enableAdvancedColumns,
+} from '../utils/test-utils';
 
 function renderWithRoute(component: ReactElement) {
   fetchMock
@@ -178,6 +182,7 @@ describe('SubtestsRevisionRow Component', () => {
   });
 
   it('should display cliffs delta, significance, and effects size in subtests for mann-whitney-u testVersion', async () => {
+    enableAdvancedColumns();
     const { subtestsMannWhitneyResult } = getTestData();
     const mockGridTemplateColumns = '1fr 1fr 1fr 1fr 1fr 1fr 1fr 1fr';
     renderWithRoute(
@@ -253,7 +258,7 @@ describe('SubtestsRevisionRow Component', () => {
       };
     }
 
-    it('shows dash when neither distribution is normal', async () => {
+    it('shows value with warning icon when neither distribution is normal', async () => {
       renderWithRoute(
         <SubtestsRevisionRow
           result={makeResult(tooFewRuns, tooFewRuns)}
@@ -263,7 +268,10 @@ describe('SubtestsRevisionRow Component', () => {
         />,
       );
       const roles = await screen.findAllByRole('cell');
-      expect(roles[4]).toHaveTextContent('-');
+      // The median difference is rank-based, so it's shown even for non-normal
+      // data; only a warning icon flags the shape.
+      expect(roles[4]).toHaveTextContent('%');
+      expect(roles[4].querySelector('svg[role="img"]')).toBeTruthy();
     });
 
     it('shows value with warning icon when only one distribution is normal', async () => {
@@ -276,7 +284,7 @@ describe('SubtestsRevisionRow Component', () => {
         />,
       );
       const roles = await screen.findAllByRole('cell');
-      expect(roles[4]).not.toHaveTextContent('-');
+      expect(roles[4]).toHaveTextContent('%');
       expect(roles[4].querySelector('svg[role="img"]')).toBeTruthy();
     });
 
@@ -290,7 +298,7 @@ describe('SubtestsRevisionRow Component', () => {
         />,
       );
       const roles = await screen.findAllByRole('cell');
-      expect(roles[4]).not.toHaveTextContent('-');
+      expect(roles[4]).toHaveTextContent('%');
       expect(roles[4].querySelector('svg[role="img"]')).toBeFalsy();
     });
   });
diff --git a/src/__tests__/CompareResults/__snapshots__/OverTimeResultsView.test.tsx.snap b/src/__tests__/CompareResults/__snapshots__/OverTimeResultsView.test.tsx.snap
index dbd059e14..0d1a7f550 100644
--- a/src/__tests__/CompareResults/__snapshots__/OverTimeResultsView.test.tsx.snap
+++ b/src/__tests__/CompareResults/__snapshots__/OverTimeResultsView.test.tsx.snap
@@ -217,7 +217,7 @@ exports[`Results View The table should match snapshot and other elements should
         </div>
       </div>
       <div
-        class="MuiGrid-root MuiGrid-direction-xs-row MuiGrid-grid-xs-grow css-t3of1j-MuiGrid-root"
+        class="MuiGrid-root MuiGrid-direction-xs-row MuiGrid-grid-xs-grow css-vvfr7q-MuiGrid-root"
       >
         <div
           class="MuiBox-root css-0"
@@ -295,7 +295,7 @@ exports[`Results View The table should match snapshot and other elements should
         </div>
       </div>
       <div
-        class="MuiGrid-root MuiGrid-direction-xs-row MuiGrid-grid-xs-grow css-t3of1j-MuiGrid-root"
+        class="MuiGrid-root MuiGrid-direction-xs-row MuiGrid-grid-xs-grow css-wautn6-MuiGrid-root"
       >
         <div
           class="f6hg2jo"
@@ -312,41 +312,76 @@ exports[`Results View The table should match snapshot and other elements should
       <div
         class="MuiGrid-root MuiGrid-direction-xs-row MuiGrid-grid-xs-auto css-zh2j38-MuiGrid-root"
       >
-        <label
-          aria-label="Expand all rows"
-          class="MuiFormControlLabel-root MuiFormControlLabel-labelPlacementEnd css-1bsjtco-MuiFormControlLabel-root"
-          data-mui-internal-clone-element="true"
+        <div
+          class="MuiBox-root css-p2w42"
         >
-          <span
-            class="MuiButtonBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall PrivateSwitchBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall css-1nff2up-MuiButtonBase-root-MuiSwitchBase-root-MuiCheckbox-root"
+          <label
+            aria-label="Show the advanced statistics columns (Cliff’s Delta, CLES, Significance)"
+            class="MuiFormControlLabel-root MuiFormControlLabel-labelPlacementEnd css-1bsjtco-MuiFormControlLabel-root"
+            data-mui-internal-clone-element="true"
           >
-            <input
-              class="PrivateSwitchBase-input css-12xagqm-MuiSwitchBase-root"
-              data-indeterminate="false"
-              type="checkbox"
-            />
-            <svg
-              aria-hidden="true"
-              class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
-              data-testid="CheckBoxOutlineBlankIcon"
-              focusable="false"
-              viewBox="0 0 24 24"
+            <span
+              class="MuiButtonBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall PrivateSwitchBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall css-1nff2up-MuiButtonBase-root-MuiSwitchBase-root-MuiCheckbox-root"
             >
-              <path
-                d="M19 5v14H5V5h14m0-2H5c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h14c1.1 0 2-.9 2-2V5c0-1.1-.9-2-2-2z"
+              <input
+                class="PrivateSwitchBase-input css-12xagqm-MuiSwitchBase-root"
+                data-indeterminate="false"
+                type="checkbox"
               />
-            </svg>
-          </span>
-          <span
-            class="MuiTypography-root MuiTypography-body1 MuiFormControlLabel-label css-n290n7-MuiTypography-root"
+              <svg
+                aria-hidden="true"
+                class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
+                data-testid="CheckBoxOutlineBlankIcon"
+                focusable="false"
+                viewBox="0 0 24 24"
+              >
+                <path
+                  d="M19 5v14H5V5h14m0-2H5c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h14c1.1 0 2-.9 2-2V5c0-1.1-.9-2-2-2z"
+                />
+              </svg>
+            </span>
+            <span
+              class="MuiTypography-root MuiTypography-body1 MuiFormControlLabel-label css-n290n7-MuiTypography-root"
+            >
+              Advanced columns
+            </span>
+          </label>
+          <label
+            aria-label="Expand all rows"
+            class="MuiFormControlLabel-root MuiFormControlLabel-labelPlacementEnd css-1bsjtco-MuiFormControlLabel-root"
+            data-mui-internal-clone-element="true"
           >
-            Expand all
-          </span>
-        </label>
+            <span
+              class="MuiButtonBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall PrivateSwitchBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall css-1nff2up-MuiButtonBase-root-MuiSwitchBase-root-MuiCheckbox-root"
+            >
+              <input
+                class="PrivateSwitchBase-input css-12xagqm-MuiSwitchBase-root"
+                data-indeterminate="false"
+                type="checkbox"
+              />
+              <svg
+                aria-hidden="true"
+                class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
+                data-testid="CheckBoxOutlineBlankIcon"
+                focusable="false"
+                viewBox="0 0 24 24"
+              >
+                <path
+                  d="M19 5v14H5V5h14m0-2H5c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h14c1.1 0 2-.9 2-2V5c0-1.1-.9-2-2-2z"
+                />
+              </svg>
+            </span>
+            <span
+              class="MuiTypography-root MuiTypography-body1 MuiFormControlLabel-label css-n290n7-MuiTypography-root"
+            >
+              Expand all
+            </span>
+          </label>
+        </div>
       </div>
     </div>
     <div
-      class="fdtnfac f1l733lh"
+      class="f11g8g7n f1l733lh"
       data-testid="table-header"
       role="row"
     >
@@ -417,12 +452,12 @@ exports[`Results View The table should match snapshot and other elements should
         role="columnheader"
       >
         <span
-          aria-label="Median Diff %: The percentage change in median from Base to New: ((New − Base) / Base) × 100."
+          aria-label="Shows how much the middle result changed from Base to New. We line up all the runs from smallest to biggest and pick the middle one for each side, then show the change as a percent. A postive sign means New is higher; a negative sign means New is lower."
           class="MuiBox-root css-1tkq7a4"
           data-mui-internal-clone-element="true"
         >
           <button
-            aria-label="MD (%) (Click to sort by this column)"
+            aria-label="Δ Median % (Click to sort by this column)"
             class="MuiButtonBase-root MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation css-7upxw3-MuiButtonBase-root-MuiButton-root"
             tabindex="0"
             type="button"
@@ -438,10 +473,10 @@ exports[`Results View The table should match snapshot and other elements should
                 d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
               />
               <title>
-                Not sorted by MD (%)
+                Not sorted by Δ Median %
               </title>
             </svg>
-            MD (%)
+            Δ Median %
           </button>
         </span>
       </div>
@@ -480,47 +515,16 @@ exports[`Results View The table should match snapshot and other elements should
         </button>
       </div>
       <div
-        class="cell delta-header"
-        role="columnheader"
-      >
-        <span
-          class="MuiBox-root css-1tkq7a4"
-          data-mui-internal-clone-element="true"
-        >
-          <button
-            aria-label="CD (Click to sort by this column)"
-            class="MuiButtonBase-root MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation css-7upxw3-MuiButtonBase-root-MuiButton-root"
-            tabindex="0"
-            type="button"
-          >
-            <svg
-              class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-10d4m26-MuiSvgIcon-root"
-              data-testid="SwapVertIcon"
-              focusable="false"
-              role="img"
-              viewBox="0 0 24 24"
-            >
-              <path
-                d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
-              />
-              <title>
-                Not sorted by CD
-              </title>
-            </svg>
-            CD
-          </button>
-        </span>
-      </div>
-      <div
-        class="cell effects-header"
+        class="cell difference-size-header"
         role="columnheader"
       >
         <span
+          aria-label="Shows how big the difference between Base and New is, in plain words: negligible (barely any), small, medium, or large. It comes from how much the Base and New results overlap — the less they overlap, the bigger the difference."
           class="MuiBox-root css-1tkq7a4"
           data-mui-internal-clone-element="true"
         >
           <button
-            aria-label="CLES (%) (Click to sort by this column)"
+            aria-label="Difference Size (Click to sort by this column)"
             class="MuiButtonBase-root MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation css-7upxw3-MuiButtonBase-root-MuiButton-root"
             tabindex="0"
             type="button"
@@ -536,73 +540,13 @@ exports[`Results View The table should match snapshot and other elements should
                 d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
               />
               <title>
-                Not sorted by CLES (%)
+                Not sorted by Difference Size
               </title>
             </svg>
-            CLES (%)
+            Difference Size
           </button>
         </span>
       </div>
-      <div
-        class="cell significance-header"
-        role="columnheader"
-      >
-        <div
-          class="MuiButtonGroup-root MuiButtonGroup-contained MuiButtonGroup-horizontal MuiButtonGroup-disableElevation MuiButtonGroup-colorTableHeaderButton css-1fyroww-MuiButtonGroup-root"
-          role="group"
-        >
-          <button
-            aria-label="Sig (Click to sort by this column)"
-            class="MuiButtonBase-root MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButtonGroup-firstButton css-17eldkb-MuiButtonBase-root-MuiButton-root"
-            tabindex="0"
-            type="button"
-          >
-            <svg
-              class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
-              data-testid="SwapVertIcon"
-              focusable="false"
-              role="img"
-              viewBox="0 0 24 24"
-            >
-              <path
-                d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
-              />
-              <title>
-                Not sorted by Sig
-              </title>
-            </svg>
-          </button>
-          <button
-            aria-haspopup="true"
-            aria-label="Sig (Click to filter values)"
-            class="MuiButtonBase-root MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation MuiButtonGroup-lastButton css-l81dbu-MuiButtonBase-root-MuiButton-root"
-            data-mui-internal-clone-element="true"
-            tabindex="0"
-            type="button"
-          >
-            Sig
-            <div
-              aria-label="2 items selected"
-              class="MuiBox-root css-18uhbjh"
-            >
-              (
-              2
-              )
-            </div>
-            <svg
-              aria-hidden="true"
-              class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-120he73-MuiSvgIcon-root"
-              data-testid="KeyboardArrowDownIcon"
-              focusable="false"
-              viewBox="0 0 24 24"
-            >
-              <path
-                d="M7.41 8.59 12 13.17l4.59-4.58L18 10l-6 6-6-6z"
-              />
-            </svg>
-          </button>
-        </div>
-      </div>
       <div
         class="cell trials-header"
         role="columnheader"
@@ -742,7 +686,7 @@ exports[`Results View The table should match snapshot and other elements should
               class="revision-block fw0pvlu"
             >
               <div
-                class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1woqe0l"
+                class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1eojgcr"
                 role="row"
               >
                 <div
@@ -797,7 +741,7 @@ exports[`Results View The table should match snapshot and other elements should
                   <span
                     style="display: inline-flex; align-items: center; gap: 4px;"
                   >
-                    0 %
+                    +1.85%
                   </span>
                 </div>
                 <div
@@ -809,19 +753,7 @@ exports[`Results View The table should match snapshot and other elements should
                   />
                 </div>
                 <div
-                  class="delta cell"
-                  role="cell"
-                >
-                  -
-                </div>
-                <div
-                  class="effects cell"
-                  role="cell"
-                >
-                  -
-                </div>
-                <div
-                  class="significance cell"
+                  class="difference-size cell"
                   role="cell"
                 >
                   -
@@ -917,7 +849,7 @@ exports[`Results View The table should match snapshot and other elements should
                     data-testid="expand-revision-button"
                   >
                     <button
-                      aria-controls="_r_12_"
+                      aria-controls="_r_u_"
                       aria-expanded="false"
                       class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                       tabindex="0"
@@ -940,7 +872,7 @@ exports[`Results View The table should match snapshot and other elements should
                 </div>
               </div>
               <div
-                class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1woqe0l"
+                class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1eojgcr"
                 role="row"
               >
                 <div
@@ -996,7 +928,7 @@ exports[`Results View The table should match snapshot and other elements should
                   <span
                     style="display: inline-flex; align-items: center; gap: 4px;"
                   >
-                    0 %
+                    +1.08%
                   </span>
                 </div>
                 <div
@@ -1008,19 +940,7 @@ exports[`Results View The table should match snapshot and other elements should
                   />
                 </div>
                 <div
-                  class="delta cell"
-                  role="cell"
-                >
-                  -
-                </div>
-                <div
-                  class="effects cell"
-                  role="cell"
-                >
-                  -
-                </div>
-                <div
-                  class="significance cell"
+                  class="difference-size cell"
                   role="cell"
                 >
                   -
@@ -1116,7 +1036,7 @@ exports[`Results View The table should match snapshot and other elements should
                     data-testid="expand-revision-button"
                   >
                     <button
-                      aria-controls="_r_19_"
+                      aria-controls="_r_15_"
                       aria-expanded="false"
                       class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                       tabindex="0"
@@ -1139,7 +1059,7 @@ exports[`Results View The table should match snapshot and other elements should
                 </div>
               </div>
               <div
-                class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1woqe0l"
+                class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1eojgcr"
                 role="row"
               >
                 <div
@@ -1195,7 +1115,7 @@ exports[`Results View The table should match snapshot and other elements should
                   <span
                     style="display: inline-flex; align-items: center; gap: 4px;"
                   >
-                    0 %
+                    -2.40%
                   </span>
                 </div>
                 <div
@@ -1207,19 +1127,7 @@ exports[`Results View The table should match snapshot and other elements should
                   />
                 </div>
                 <div
-                  class="delta cell"
-                  role="cell"
-                >
-                  -
-                </div>
-                <div
-                  class="effects cell"
-                  role="cell"
-                >
-                  -
-                </div>
-                <div
-                  class="significance cell"
+                  class="difference-size cell"
                   role="cell"
                 >
                   -
@@ -1315,7 +1223,7 @@ exports[`Results View The table should match snapshot and other elements should
                     data-testid="expand-revision-button"
                   >
                     <button
-                      aria-controls="_r_1g_"
+                      aria-controls="_r_1c_"
                       aria-expanded="false"
                       class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                       tabindex="0"
@@ -1338,7 +1246,7 @@ exports[`Results View The table should match snapshot and other elements should
                 </div>
               </div>
               <div
-                class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1woqe0l"
+                class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1eojgcr"
                 role="row"
               >
                 <div
@@ -1394,7 +1302,7 @@ exports[`Results View The table should match snapshot and other elements should
                   <span
                     style="display: inline-flex; align-items: center; gap: 4px;"
                   >
-                    0 %
+                    -2.40%
                   </span>
                 </div>
                 <div
@@ -1406,19 +1314,7 @@ exports[`Results View The table should match snapshot and other elements should
                   />
                 </div>
                 <div
-                  class="delta cell"
-                  role="cell"
-                >
-                  -
-                </div>
-                <div
-                  class="effects cell"
-                  role="cell"
-                >
-                  -
-                </div>
-                <div
-                  class="significance cell"
+                  class="difference-size cell"
                   role="cell"
                 >
                   -
@@ -1514,7 +1410,7 @@ exports[`Results View The table should match snapshot and other elements should
                     data-testid="expand-revision-button"
                   >
                     <button
-                      aria-controls="_r_1n_"
+                      aria-controls="_r_1j_"
                       aria-expanded="false"
                       class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                       tabindex="0"
diff --git a/src/__tests__/CompareResults/__snapshots__/ResultsTable.test.tsx.snap b/src/__tests__/CompareResults/__snapshots__/ResultsTable.test.tsx.snap
index 95b362d3d..51cd17bbb 100644
--- a/src/__tests__/CompareResults/__snapshots__/ResultsTable.test.tsx.snap
+++ b/src/__tests__/CompareResults/__snapshots__/ResultsTable.test.tsx.snap
@@ -1190,7 +1190,7 @@ exports[`Results Table Should match snapshot 1`] = `
                     </div>
                   </div>
                   <div
-                    class="MuiGrid-root MuiGrid-direction-xs-row MuiGrid-grid-xs-grow css-t3of1j-MuiGrid-root"
+                    class="MuiGrid-root MuiGrid-direction-xs-row MuiGrid-grid-xs-grow css-vvfr7q-MuiGrid-root"
                   >
                     <div
                       class="MuiBox-root css-0"
@@ -1268,7 +1268,7 @@ exports[`Results Table Should match snapshot 1`] = `
                     </div>
                   </div>
                   <div
-                    class="MuiGrid-root MuiGrid-direction-xs-row MuiGrid-grid-xs-grow css-t3of1j-MuiGrid-root"
+                    class="MuiGrid-root MuiGrid-direction-xs-row MuiGrid-grid-xs-grow css-wautn6-MuiGrid-root"
                   >
                     <div
                       class="f6hg2jo"
@@ -1285,41 +1285,76 @@ exports[`Results Table Should match snapshot 1`] = `
                   <div
                     class="MuiGrid-root MuiGrid-direction-xs-row MuiGrid-grid-xs-auto css-zh2j38-MuiGrid-root"
                   >
-                    <label
-                      aria-label="Expand all rows"
-                      class="MuiFormControlLabel-root MuiFormControlLabel-labelPlacementEnd css-1bsjtco-MuiFormControlLabel-root"
-                      data-mui-internal-clone-element="true"
+                    <div
+                      class="MuiBox-root css-p2w42"
                     >
-                      <span
-                        class="MuiButtonBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall PrivateSwitchBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall css-1nff2up-MuiButtonBase-root-MuiSwitchBase-root-MuiCheckbox-root"
+                      <label
+                        aria-label="Show the advanced statistics columns (Cliff’s Delta, CLES, Significance)"
+                        class="MuiFormControlLabel-root MuiFormControlLabel-labelPlacementEnd css-1bsjtco-MuiFormControlLabel-root"
+                        data-mui-internal-clone-element="true"
                       >
-                        <input
-                          class="PrivateSwitchBase-input css-12xagqm-MuiSwitchBase-root"
-                          data-indeterminate="false"
-                          type="checkbox"
-                        />
-                        <svg
-                          aria-hidden="true"
-                          class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
-                          data-testid="CheckBoxOutlineBlankIcon"
-                          focusable="false"
-                          viewBox="0 0 24 24"
+                        <span
+                          class="MuiButtonBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall PrivateSwitchBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall css-1nff2up-MuiButtonBase-root-MuiSwitchBase-root-MuiCheckbox-root"
                         >
-                          <path
-                            d="M19 5v14H5V5h14m0-2H5c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h14c1.1 0 2-.9 2-2V5c0-1.1-.9-2-2-2z"
+                          <input
+                            class="PrivateSwitchBase-input css-12xagqm-MuiSwitchBase-root"
+                            data-indeterminate="false"
+                            type="checkbox"
                           />
-                        </svg>
-                      </span>
-                      <span
-                        class="MuiTypography-root MuiTypography-body1 MuiFormControlLabel-label css-n290n7-MuiTypography-root"
+                          <svg
+                            aria-hidden="true"
+                            class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
+                            data-testid="CheckBoxOutlineBlankIcon"
+                            focusable="false"
+                            viewBox="0 0 24 24"
+                          >
+                            <path
+                              d="M19 5v14H5V5h14m0-2H5c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h14c1.1 0 2-.9 2-2V5c0-1.1-.9-2-2-2z"
+                            />
+                          </svg>
+                        </span>
+                        <span
+                          class="MuiTypography-root MuiTypography-body1 MuiFormControlLabel-label css-n290n7-MuiTypography-root"
+                        >
+                          Advanced columns
+                        </span>
+                      </label>
+                      <label
+                        aria-label="Expand all rows"
+                        class="MuiFormControlLabel-root MuiFormControlLabel-labelPlacementEnd css-1bsjtco-MuiFormControlLabel-root"
+                        data-mui-internal-clone-element="true"
                       >
-                        Expand all
-                      </span>
-                    </label>
+                        <span
+                          class="MuiButtonBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall PrivateSwitchBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall css-1nff2up-MuiButtonBase-root-MuiSwitchBase-root-MuiCheckbox-root"
+                        >
+                          <input
+                            class="PrivateSwitchBase-input css-12xagqm-MuiSwitchBase-root"
+                            data-indeterminate="false"
+                            type="checkbox"
+                          />
+                          <svg
+                            aria-hidden="true"
+                            class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
+                            data-testid="CheckBoxOutlineBlankIcon"
+                            focusable="false"
+                            viewBox="0 0 24 24"
+                          >
+                            <path
+                              d="M19 5v14H5V5h14m0-2H5c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h14c1.1 0 2-.9 2-2V5c0-1.1-.9-2-2-2z"
+                            />
+                          </svg>
+                        </span>
+                        <span
+                          class="MuiTypography-root MuiTypography-body1 MuiFormControlLabel-label css-n290n7-MuiTypography-root"
+                        >
+                          Expand all
+                        </span>
+                      </label>
+                    </div>
                   </div>
                 </div>
                 <div
-                  class="fdtnfac f1l733lh"
+                  class="f11g8g7n f1l733lh"
                   data-testid="table-header"
                   role="row"
                 >
@@ -1390,12 +1425,12 @@ exports[`Results Table Should match snapshot 1`] = `
                     role="columnheader"
                   >
                     <span
-                      aria-label="Median Diff %: The percentage change in median from Base to New: ((New − Base) / Base) × 100."
+                      aria-label="Shows how much the middle result changed from Base to New. We line up all the runs from smallest to biggest and pick the middle one for each side, then show the change as a percent. A postive sign means New is higher; a negative sign means New is lower."
                       class="MuiBox-root css-1tkq7a4"
                       data-mui-internal-clone-element="true"
                     >
                       <button
-                        aria-label="MD (%) (Click to sort by this column)"
+                        aria-label="Δ Median % (Click to sort by this column)"
                         class="MuiButtonBase-root MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation css-7upxw3-MuiButtonBase-root-MuiButton-root"
                         tabindex="0"
                         type="button"
@@ -1411,10 +1446,10 @@ exports[`Results Table Should match snapshot 1`] = `
                             d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
                           />
                           <title>
-                            Not sorted by MD (%)
+                            Not sorted by Δ Median %
                           </title>
                         </svg>
-                        MD (%)
+                        Δ Median %
                       </button>
                     </span>
                   </div>
@@ -1453,15 +1488,16 @@ exports[`Results Table Should match snapshot 1`] = `
                     </button>
                   </div>
                   <div
-                    class="cell delta-header"
+                    class="cell difference-size-header"
                     role="columnheader"
                   >
                     <span
+                      aria-label="Shows how big the difference between Base and New is, in plain words: negligible (barely any), small, medium, or large. It comes from how much the Base and New results overlap — the less they overlap, the bigger the difference."
                       class="MuiBox-root css-1tkq7a4"
                       data-mui-internal-clone-element="true"
                     >
                       <button
-                        aria-label="CD (Click to sort by this column)"
+                        aria-label="Difference Size (Click to sort by this column)"
                         class="MuiButtonBase-root MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation css-7upxw3-MuiButtonBase-root-MuiButton-root"
                         tabindex="0"
                         type="button"
@@ -1477,105 +1513,13 @@ exports[`Results Table Should match snapshot 1`] = `
                             d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
                           />
                           <title>
-                            Not sorted by CD
+                            Not sorted by Difference Size
                           </title>
                         </svg>
-                        CD
+                        Difference Size
                       </button>
                     </span>
                   </div>
-                  <div
-                    class="cell effects-header"
-                    role="columnheader"
-                  >
-                    <span
-                      class="MuiBox-root css-1tkq7a4"
-                      data-mui-internal-clone-element="true"
-                    >
-                      <button
-                        aria-label="CLES (%) (Click to sort by this column)"
-                        class="MuiButtonBase-root MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation css-7upxw3-MuiButtonBase-root-MuiButton-root"
-                        tabindex="0"
-                        type="button"
-                      >
-                        <svg
-                          class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-10d4m26-MuiSvgIcon-root"
-                          data-testid="SwapVertIcon"
-                          focusable="false"
-                          role="img"
-                          viewBox="0 0 24 24"
-                        >
-                          <path
-                            d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
-                          />
-                          <title>
-                            Not sorted by CLES (%)
-                          </title>
-                        </svg>
-                        CLES (%)
-                      </button>
-                    </span>
-                  </div>
-                  <div
-                    class="cell significance-header"
-                    role="columnheader"
-                  >
-                    <div
-                      class="MuiButtonGroup-root MuiButtonGroup-contained MuiButtonGroup-horizontal MuiButtonGroup-disableElevation MuiButtonGroup-colorTableHeaderButton css-1fyroww-MuiButtonGroup-root"
-                      role="group"
-                    >
-                      <button
-                        aria-label="Sig (Click to sort by this column)"
-                        class="MuiButtonBase-root MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButtonGroup-firstButton css-17eldkb-MuiButtonBase-root-MuiButton-root"
-                        tabindex="0"
-                        type="button"
-                      >
-                        <svg
-                          class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
-                          data-testid="SwapVertIcon"
-                          focusable="false"
-                          role="img"
-                          viewBox="0 0 24 24"
-                        >
-                          <path
-                            d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
-                          />
-                          <title>
-                            Not sorted by Sig
-                          </title>
-                        </svg>
-                      </button>
-                      <button
-                        aria-haspopup="true"
-                        aria-label="Sig (Click to filter values)"
-                        class="MuiButtonBase-root MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation MuiButtonGroup-lastButton css-l81dbu-MuiButtonBase-root-MuiButton-root"
-                        data-mui-internal-clone-element="true"
-                        tabindex="0"
-                        type="button"
-                      >
-                        Sig
-                        <div
-                          aria-label="2 items selected"
-                          class="MuiBox-root css-18uhbjh"
-                        >
-                          (
-                          2
-                          )
-                        </div>
-                        <svg
-                          aria-hidden="true"
-                          class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-120he73-MuiSvgIcon-root"
-                          data-testid="KeyboardArrowDownIcon"
-                          focusable="false"
-                          viewBox="0 0 24 24"
-                        >
-                          <path
-                            d="M7.41 8.59 12 13.17l4.59-4.58L18 10l-6 6-6-6z"
-                          />
-                        </svg>
-                      </button>
-                    </div>
-                  </div>
                   <div
                     class="cell trials-header"
                     role="columnheader"
@@ -1715,7 +1659,7 @@ exports[`Results Table Should match snapshot 1`] = `
                           class="revision-block fw0pvlu"
                         >
                           <div
-                            class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1woqe0l"
+                            class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1eojgcr"
                             role="row"
                           >
                             <div
@@ -1770,7 +1714,7 @@ exports[`Results Table Should match snapshot 1`] = `
                               <span
                                 style="display: inline-flex; align-items: center; gap: 4px;"
                               >
-                                0 %
+                                +1.85%
                               </span>
                             </div>
                             <div
@@ -1782,19 +1726,7 @@ exports[`Results Table Should match snapshot 1`] = `
                               />
                             </div>
                             <div
-                              class="delta cell"
-                              role="cell"
-                            >
-                              -
-                            </div>
-                            <div
-                              class="effects cell"
-                              role="cell"
-                            >
-                              -
-                            </div>
-                            <div
-                              class="significance cell"
+                              class="difference-size cell"
                               role="cell"
                             >
                               -
@@ -1890,7 +1822,7 @@ exports[`Results Table Should match snapshot 1`] = `
                                 data-testid="expand-revision-button"
                               >
                                 <button
-                                  aria-controls="_r_1c_"
+                                  aria-controls="_r_18_"
                                   aria-expanded="false"
                                   class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                                   tabindex="0"
@@ -1913,7 +1845,7 @@ exports[`Results Table Should match snapshot 1`] = `
                             </div>
                           </div>
                           <div
-                            class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1woqe0l"
+                            class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1eojgcr"
                             role="row"
                           >
                             <div
@@ -1969,7 +1901,7 @@ exports[`Results Table Should match snapshot 1`] = `
                               <span
                                 style="display: inline-flex; align-items: center; gap: 4px;"
                               >
-                                0 %
+                                +1.08%
                               </span>
                             </div>
                             <div
@@ -1981,19 +1913,7 @@ exports[`Results Table Should match snapshot 1`] = `
                               />
                             </div>
                             <div
-                              class="delta cell"
-                              role="cell"
-                            >
-                              -
-                            </div>
-                            <div
-                              class="effects cell"
-                              role="cell"
-                            >
-                              -
-                            </div>
-                            <div
-                              class="significance cell"
+                              class="difference-size cell"
                               role="cell"
                             >
                               -
@@ -2089,7 +2009,7 @@ exports[`Results Table Should match snapshot 1`] = `
                                 data-testid="expand-revision-button"
                               >
                                 <button
-                                  aria-controls="_r_1j_"
+                                  aria-controls="_r_1f_"
                                   aria-expanded="false"
                                   class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                                   tabindex="0"
@@ -2112,7 +2032,7 @@ exports[`Results Table Should match snapshot 1`] = `
                             </div>
                           </div>
                           <div
-                            class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1woqe0l"
+                            class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1eojgcr"
                             role="row"
                           >
                             <div
@@ -2168,7 +2088,7 @@ exports[`Results Table Should match snapshot 1`] = `
                               <span
                                 style="display: inline-flex; align-items: center; gap: 4px;"
                               >
-                                0 %
+                                -2.40%
                               </span>
                             </div>
                             <div
@@ -2180,19 +2100,7 @@ exports[`Results Table Should match snapshot 1`] = `
                               />
                             </div>
                             <div
-                              class="delta cell"
-                              role="cell"
-                            >
-                              -
-                            </div>
-                            <div
-                              class="effects cell"
-                              role="cell"
-                            >
-                              -
-                            </div>
-                            <div
-                              class="significance cell"
+                              class="difference-size cell"
                               role="cell"
                             >
                               -
@@ -2288,7 +2196,7 @@ exports[`Results Table Should match snapshot 1`] = `
                                 data-testid="expand-revision-button"
                               >
                                 <button
-                                  aria-controls="_r_1q_"
+                                  aria-controls="_r_1m_"
                                   aria-expanded="false"
                                   class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                                   tabindex="0"
@@ -2398,7 +2306,7 @@ exports[`Results Table Should match snapshot 1`] = `
                           class="revision-block fw0pvlu"
                         >
                           <div
-                            class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1woqe0l"
+                            class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1eojgcr"
                             role="row"
                           >
                             <div
@@ -2454,7 +2362,7 @@ exports[`Results Table Should match snapshot 1`] = `
                               <span
                                 style="display: inline-flex; align-items: center; gap: 4px;"
                               >
-                                0 %
+                                -2.40%
                               </span>
                             </div>
                             <div
@@ -2466,19 +2374,7 @@ exports[`Results Table Should match snapshot 1`] = `
                               />
                             </div>
                             <div
-                              class="delta cell"
-                              role="cell"
-                            >
-                              -
-                            </div>
-                            <div
-                              class="effects cell"
-                              role="cell"
-                            >
-                              -
-                            </div>
-                            <div
-                              class="significance cell"
+                              class="difference-size cell"
                               role="cell"
                             >
                               -
@@ -2574,7 +2470,7 @@ exports[`Results Table Should match snapshot 1`] = `
                                 data-testid="expand-revision-button"
                               >
                                 <button
-                                  aria-controls="_r_22_"
+                                  aria-controls="_r_1u_"
                                   aria-expanded="false"
                                   class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                                   tabindex="0"
@@ -4073,7 +3969,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                     </div>
                   </div>
                   <div
-                    class="MuiGrid-root MuiGrid-direction-xs-row MuiGrid-grid-xs-grow css-t3of1j-MuiGrid-root"
+                    class="MuiGrid-root MuiGrid-direction-xs-row MuiGrid-grid-xs-grow css-vvfr7q-MuiGrid-root"
                   >
                     <div
                       class="MuiBox-root css-0"
@@ -4151,7 +4047,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                     </div>
                   </div>
                   <div
-                    class="MuiGrid-root MuiGrid-direction-xs-row MuiGrid-grid-xs-grow css-t3of1j-MuiGrid-root"
+                    class="MuiGrid-root MuiGrid-direction-xs-row MuiGrid-grid-xs-grow css-wautn6-MuiGrid-root"
                   >
                     <div
                       class="f6hg2jo"
@@ -4168,41 +4064,77 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                   <div
                     class="MuiGrid-root MuiGrid-direction-xs-row MuiGrid-grid-xs-auto css-zh2j38-MuiGrid-root"
                   >
-                    <label
-                      aria-label="Expand all rows"
-                      class="MuiFormControlLabel-root MuiFormControlLabel-labelPlacementEnd css-1bsjtco-MuiFormControlLabel-root"
-                      data-mui-internal-clone-element="true"
+                    <div
+                      class="MuiBox-root css-p2w42"
                     >
-                      <span
-                        class="MuiButtonBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall PrivateSwitchBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall css-1nff2up-MuiButtonBase-root-MuiSwitchBase-root-MuiCheckbox-root"
+                      <label
+                        aria-label="Show the advanced statistics columns (Cliff’s Delta, CLES, Significance)"
+                        class="MuiFormControlLabel-root MuiFormControlLabel-labelPlacementEnd css-1bsjtco-MuiFormControlLabel-root"
+                        data-mui-internal-clone-element="true"
                       >
-                        <input
-                          class="PrivateSwitchBase-input css-12xagqm-MuiSwitchBase-root"
-                          data-indeterminate="false"
-                          type="checkbox"
-                        />
-                        <svg
-                          aria-hidden="true"
-                          class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
-                          data-testid="CheckBoxOutlineBlankIcon"
-                          focusable="false"
-                          viewBox="0 0 24 24"
+                        <span
+                          class="MuiButtonBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall PrivateSwitchBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall Mui-checked MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall css-1nff2up-MuiButtonBase-root-MuiSwitchBase-root-MuiCheckbox-root"
                         >
-                          <path
-                            d="M19 5v14H5V5h14m0-2H5c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h14c1.1 0 2-.9 2-2V5c0-1.1-.9-2-2-2z"
+                          <input
+                            checked=""
+                            class="PrivateSwitchBase-input css-12xagqm-MuiSwitchBase-root"
+                            data-indeterminate="false"
+                            type="checkbox"
                           />
-                        </svg>
-                      </span>
-                      <span
-                        class="MuiTypography-root MuiTypography-body1 MuiFormControlLabel-label css-n290n7-MuiTypography-root"
+                          <svg
+                            aria-hidden="true"
+                            class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
+                            data-testid="CheckBoxIcon"
+                            focusable="false"
+                            viewBox="0 0 24 24"
+                          >
+                            <path
+                              d="M19 3H5c-1.11 0-2 .9-2 2v14c0 1.1.89 2 2 2h14c1.11 0 2-.9 2-2V5c0-1.1-.89-2-2-2zm-9 14l-5-5 1.41-1.41L10 14.17l7.59-7.59L19 8l-9 9z"
+                            />
+                          </svg>
+                        </span>
+                        <span
+                          class="MuiTypography-root MuiTypography-body1 MuiFormControlLabel-label css-n290n7-MuiTypography-root"
+                        >
+                          Advanced columns
+                        </span>
+                      </label>
+                      <label
+                        aria-label="Expand all rows"
+                        class="MuiFormControlLabel-root MuiFormControlLabel-labelPlacementEnd css-1bsjtco-MuiFormControlLabel-root"
+                        data-mui-internal-clone-element="true"
                       >
-                        Expand all
-                      </span>
-                    </label>
+                        <span
+                          class="MuiButtonBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall PrivateSwitchBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall css-1nff2up-MuiButtonBase-root-MuiSwitchBase-root-MuiCheckbox-root"
+                        >
+                          <input
+                            class="PrivateSwitchBase-input css-12xagqm-MuiSwitchBase-root"
+                            data-indeterminate="false"
+                            type="checkbox"
+                          />
+                          <svg
+                            aria-hidden="true"
+                            class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
+                            data-testid="CheckBoxOutlineBlankIcon"
+                            focusable="false"
+                            viewBox="0 0 24 24"
+                          >
+                            <path
+                              d="M19 5v14H5V5h14m0-2H5c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h14c1.1 0 2-.9 2-2V5c0-1.1-.9-2-2-2z"
+                            />
+                          </svg>
+                        </span>
+                        <span
+                          class="MuiTypography-root MuiTypography-body1 MuiFormControlLabel-label css-n290n7-MuiTypography-root"
+                        >
+                          Expand all
+                        </span>
+                      </label>
+                    </div>
                   </div>
                 </div>
                 <div
-                  class="fdtnfac f1l733lh"
+                  class="fu4bp0o f1l733lh"
                   data-testid="table-header"
                   role="row"
                 >
@@ -4273,12 +4205,12 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                     role="columnheader"
                   >
                     <span
-                      aria-label="Median Diff %: The percentage change in median from Base to New: ((New − Base) / Base) × 100."
+                      aria-label="Shows how much the middle result changed from Base to New. We line up all the runs from smallest to biggest and pick the middle one for each side, then show the change as a percent. A postive sign means New is higher; a negative sign means New is lower."
                       class="MuiBox-root css-1tkq7a4"
                       data-mui-internal-clone-element="true"
                     >
                       <button
-                        aria-label="MD (%) (Click to sort by this column)"
+                        aria-label="Δ Median % (Click to sort by this column)"
                         class="MuiButtonBase-root MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation css-7upxw3-MuiButtonBase-root-MuiButton-root"
                         tabindex="0"
                         type="button"
@@ -4294,10 +4226,10 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                             d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
                           />
                           <title>
-                            Not sorted by MD (%)
+                            Not sorted by Δ Median %
                           </title>
                         </svg>
-                        MD (%)
+                        Δ Median %
                       </button>
                     </span>
                   </div>
@@ -4376,7 +4308,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                       data-mui-internal-clone-element="true"
                     >
                       <button
-                        aria-label="CLES (%) (Click to sort by this column)"
+                        aria-label="CLES % (Click to sort by this column)"
                         class="MuiButtonBase-root MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation css-7upxw3-MuiButtonBase-root-MuiButton-root"
                         tabindex="0"
                         type="button"
@@ -4392,10 +4324,10 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                             d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
                           />
                           <title>
-                            Not sorted by CLES (%)
+                            Not sorted by CLES %
                           </title>
                         </svg>
-                        CLES (%)
+                        CLES %
                       </button>
                     </span>
                   </div>
@@ -4598,7 +4530,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                           class="revision-block fw0pvlu"
                         >
                           <div
-                            class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1woqe0l"
+                            class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-lkxut"
                             role="row"
                           >
                             <div
@@ -4653,7 +4585,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                               <span
                                 style="display: inline-flex; align-items: center; gap: 4px;"
                               >
-                                1.849 %
+                                +1.85%
                               </span>
                             </div>
                             <div
@@ -4786,7 +4718,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                                 data-testid="expand-revision-button"
                               >
                                 <button
-                                  aria-controls="_r_rj_"
+                                  aria-controls="_r_rk_"
                                   aria-expanded="false"
                                   class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                                   tabindex="0"
@@ -4809,7 +4741,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                             </div>
                           </div>
                           <div
-                            class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1woqe0l"
+                            class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-lkxut"
                             role="row"
                           >
                             <div
@@ -4865,7 +4797,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                               <span
                                 style="display: inline-flex; align-items: center; gap: 4px;"
                               >
-                                1.078 %
+                                +1.08%
                               </span>
                             </div>
                             <div
@@ -4998,7 +4930,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                                 data-testid="expand-revision-button"
                               >
                                 <button
-                                  aria-controls="_r_rq_"
+                                  aria-controls="_r_rr_"
                                   aria-expanded="false"
                                   class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                                   tabindex="0"
@@ -5021,7 +4953,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                             </div>
                           </div>
                           <div
-                            class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1woqe0l"
+                            class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-lkxut"
                             role="row"
                           >
                             <div
@@ -5077,7 +5009,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                               <span
                                 style="display: inline-flex; align-items: center; gap: 4px;"
                               >
-                                -2.401 %
+                                -2.40%
                               </span>
                             </div>
                             <div
@@ -5210,7 +5142,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                                 data-testid="expand-revision-button"
                               >
                                 <button
-                                  aria-controls="_r_s1_"
+                                  aria-controls="_r_s2_"
                                   aria-expanded="false"
                                   class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                                   tabindex="0"
@@ -5320,7 +5252,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                           class="revision-block fw0pvlu"
                         >
                           <div
-                            class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1woqe0l"
+                            class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-lkxut"
                             role="row"
                           >
                             <div
@@ -5505,7 +5437,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                                 data-testid="expand-revision-button"
                               >
                                 <button
-                                  aria-controls="_r_s9_"
+                                  aria-controls="_r_sa_"
                                   aria-expanded="false"
                                   class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                                   tabindex="0"
@@ -5735,7 +5667,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
 
 exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion can sort params from the URL on mann-whitney-u test_version 6`] = `
 <button
-  aria-label="CLES (%) (Currently sorted by this column. Click to change)"
+  aria-label="CLES % (Currently sorted by this column. Click to change)"
   class="MuiButtonBase-root Mui-focusVisible MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation css-7upxw3-MuiButtonBase-root-MuiButton-root"
   tabindex="0"
   type="button"
@@ -5751,10 +5683,10 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
       d="M11 6.83 9.41 8.41 8 7l4-4 4 4-1.41 1.41L13 6.83V21h-2z"
     />
     <title>
-      Sorted by CLES (%) in descending order
+      Sorted by CLES % in descending order
     </title>
   </svg>
-  CLES (%)
+  CLES %
   <span
     class="MuiTouchRipple-root css-r3djoj-MuiTouchRipple-root"
   >
@@ -5780,7 +5712,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
 
 exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion can sort params from the URL on mann-whitney-u test_version 7`] = `
 <button
-  aria-label="CLES (%) (Currently sorted by this column. Click to change)"
+  aria-label="CLES % (Currently sorted by this column. Click to change)"
   class="MuiButtonBase-root Mui-focusVisible MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation css-7upxw3-MuiButtonBase-root-MuiButton-root"
   tabindex="0"
   type="button"
@@ -5796,10 +5728,10 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
       d="M11 6.83 9.41 8.41 8 7l4-4 4 4-1.41 1.41L13 6.83V21h-2z"
     />
     <title>
-      Sorted by CLES (%) in ascending order
+      Sorted by CLES % in ascending order
     </title>
   </svg>
-  CLES (%)
+  CLES %
   <span
     class="MuiTouchRipple-root css-r3djoj-MuiTouchRipple-root"
   >
@@ -5835,32 +5767,32 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
 [
   "a11yr dhtml.html opt e10s fission stylo webrender",
   "  rev: spam",
-  "  - Linux 18.04, 1.849 %, Regression, -, -, 45.00 %",
-  "  - macOS 10.15, 1.078 %, Improvement, 0.1, -, 25.00 %",
+  "  - Linux 18.04, +1.85%, Regression, -, -, 45.00 %",
+  "  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %",
   "  - Windows 10, -, , -, , 100.00 %",
-  "  - Windows 10, -2.401 %, , -, , 50.00 %",
+  "  - Windows 10, -2.40%, , -, , 50.00 %",
   "  rev: tictactoe",
-  "  - Linux 18.04, 1.849 %, Regression, 0.8, -, 44.00 %",
-  "  - macOS 10.15, 1.078 %, Improvement, 0.9, -, 24.00 %",
+  "  - Linux 18.04, +1.85%, Regression, 0.8, -, 44.00 %",
+  "  - macOS 10.15, +1.08%, Improvement, 0.9, -, 24.00 %",
   "  - Windows 10, -, , 0.8, , 99.00 %",
-  "  - Windows 10, -2.401 %, , 0.8, , 49.00 %",
+  "  - Windows 10, -2.40%, , 0.8, , 49.00 %",
   "a11yr aria.html opt e10s fission stylo webrender",
   "  rev: spam",
-  "  - Linux 18.04, 1.849 %, Regression, 1.2, -, 44.00 %",
-  "  - macOS 10.15, 1.078 %, Improvement, 1.3, -, 24.00 %",
+  "  - Linux 18.04, +1.85%, Regression, 1.2, -, 44.00 %",
+  "  - macOS 10.15, +1.08%, Improvement, 1.3, -, 24.00 %",
   "  - Windows 10, -, , 1.2, , 99.00 %",
-  "  - Windows 10, -2.401 %, , 1.2, , 49.00 %",
+  "  - Windows 10, -2.40%, , 1.2, , 49.00 %",
   "  rev: tictactoe",
-  "  - Linux 18.04, 1.849 %, Regression, 2, -, 43.00 %",
-  "  - macOS 10.15, 1.078 %, Improvement, 2.1, -, 23.00 %",
+  "  - Linux 18.04, +1.85%, Regression, 2, -, 43.00 %",
+  "  - macOS 10.15, +1.08%, Improvement, 2.1, -, 23.00 %",
   "  - Windows 10, -, , 2, , 98.00 %",
-  "  - Windows 10, -2.401 %, , 2, , 48.00 %",
+  "  - Windows 10, -2.40%, , 2, , 48.00 %",
 ]
 `;
 
 exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion can sort params from the URL on mann-whitney-u test_version 9`] = `
 <button
-  aria-label="MD (%) (Currently sorted by this column. Click to change)"
+  aria-label="Δ Median % (Currently sorted by this column. Click to change)"
   class="MuiButtonBase-root Mui-focusVisible MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation css-7upxw3-MuiButtonBase-root-MuiButton-root"
   tabindex="0"
   type="button"
@@ -5876,10 +5808,10 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
       d="M11 6.83 9.41 8.41 8 7l4-4 4 4-1.41 1.41L13 6.83V21h-2z"
     />
     <title>
-      Sorted by MD (%) in descending order
+      Sorted by Δ Median % in descending order
     </title>
   </svg>
-  MD (%)
+  Δ Median %
   <span
     class="MuiTouchRipple-root css-r3djoj-MuiTouchRipple-root"
   >
@@ -5907,32 +5839,32 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
 [
   "a11yr dhtml.html opt e10s fission stylo webrender",
   "  rev: spam",
-  "  - Windows 10, -2.401 %, , -, , 50.00 %",
+  "  - Windows 10, -2.40%, , -, , 50.00 %",
   "  - Windows 10, -, , -, , 100.00 %",
-  "  - macOS 10.15, 1.078 %, Improvement, 0.1, -, 25.00 %",
-  "  - Linux 18.04, 1.849 %, Regression, -, -, 45.00 %",
+  "  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %",
+  "  - Linux 18.04, +1.85%, Regression, -, -, 45.00 %",
   "  rev: tictactoe",
-  "  - Windows 10, -2.401 %, , 0.8, , 49.00 %",
+  "  - Windows 10, -2.40%, , 0.8, , 49.00 %",
   "  - Windows 10, -, , 0.8, , 99.00 %",
-  "  - macOS 10.15, 1.078 %, Improvement, 0.9, -, 24.00 %",
-  "  - Linux 18.04, 1.849 %, Regression, 0.8, -, 44.00 %",
+  "  - macOS 10.15, +1.08%, Improvement, 0.9, -, 24.00 %",
+  "  - Linux 18.04, +1.85%, Regression, 0.8, -, 44.00 %",
   "a11yr aria.html opt e10s fission stylo webrender",
   "  rev: spam",
-  "  - Windows 10, -2.401 %, , 1.2, , 49.00 %",
+  "  - Windows 10, -2.40%, , 1.2, , 49.00 %",
   "  - Windows 10, -, , 1.2, , 99.00 %",
-  "  - macOS 10.15, 1.078 %, Improvement, 1.3, -, 24.00 %",
-  "  - Linux 18.04, 1.849 %, Regression, 1.2, -, 44.00 %",
+  "  - macOS 10.15, +1.08%, Improvement, 1.3, -, 24.00 %",
+  "  - Linux 18.04, +1.85%, Regression, 1.2, -, 44.00 %",
   "  rev: tictactoe",
-  "  - Windows 10, -2.401 %, , 2, , 48.00 %",
+  "  - Windows 10, -2.40%, , 2, , 48.00 %",
   "  - Windows 10, -, , 2, , 98.00 %",
-  "  - macOS 10.15, 1.078 %, Improvement, 2.1, -, 23.00 %",
-  "  - Linux 18.04, 1.849 %, Regression, 2, -, 43.00 %",
+  "  - macOS 10.15, +1.08%, Improvement, 2.1, -, 23.00 %",
+  "  - Linux 18.04, +1.85%, Regression, 2, -, 43.00 %",
 ]
 `;
 
 exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion can sort params from the URL on mann-whitney-u test_version 11`] = `
 <button
-  aria-label="MD (%) (Currently sorted by this column. Click to change)"
+  aria-label="Δ Median % (Currently sorted by this column. Click to change)"
   class="MuiButtonBase-root Mui-focusVisible MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation css-7upxw3-MuiButtonBase-root-MuiButton-root"
   tabindex="0"
   type="button"
@@ -5948,10 +5880,10 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
       d="M11 6.83 9.41 8.41 8 7l4-4 4 4-1.41 1.41L13 6.83V21h-2z"
     />
     <title>
-      Sorted by MD (%) in ascending order
+      Sorted by Δ Median % in ascending order
     </title>
   </svg>
-  MD (%)
+  Δ Median %
   <span
     class="MuiTouchRipple-root css-r3djoj-MuiTouchRipple-root"
   >
@@ -6135,7 +6067,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
       </span>
     </div>
     <div
-      class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1woqe0l"
+      class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-lkxut"
       role="row"
     >
       <div
@@ -6191,7 +6123,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
         <span
           style="display: inline-flex; align-items: center; gap: 4px;"
         >
-          1.078 %
+          +1.08%
         </span>
       </div>
       <div
@@ -6324,7 +6256,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
           data-testid="expand-revision-button"
         >
           <button
-            aria-controls="_r_v7_"
+            aria-controls="_r_va_"
             aria-expanded="false"
             class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
             tabindex="0"
@@ -6386,7 +6318,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
       </span>
     </div>
     <div
-      class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1woqe0l"
+      class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-lkxut"
       role="row"
     >
       <div
@@ -6442,7 +6374,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
         <span
           style="display: inline-flex; align-items: center; gap: 4px;"
         >
-          1.078 %
+          +1.08%
         </span>
       </div>
       <div
@@ -6575,7 +6507,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
           data-testid="expand-revision-button"
         >
           <button
-            aria-controls="_r_vf_"
+            aria-controls="_r_vi_"
             aria-expanded="false"
             class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
             tabindex="0"
@@ -6884,7 +6816,7 @@ exports[`Results Table should render different blocks when rendering several rev
           data-testid="expand-revision-button"
         >
           <button
-            aria-controls="_r_4s_"
+            aria-controls="_r_4l_"
             aria-expanded="false"
             class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
             tabindex="0"
@@ -7130,7 +7062,7 @@ exports[`Results Table should render different blocks when rendering several rev
           data-testid="expand-revision-button"
         >
           <button
-            aria-controls="_r_54_"
+            aria-controls="_r_4t_"
             aria-expanded="false"
             class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
             tabindex="0"
diff --git a/src/__tests__/CompareResults/__snapshots__/ResultsView.test.tsx.snap b/src/__tests__/CompareResults/__snapshots__/ResultsView.test.tsx.snap
index ae8cf9fbc..2f2e3e661 100644
--- a/src/__tests__/CompareResults/__snapshots__/ResultsView.test.tsx.snap
+++ b/src/__tests__/CompareResults/__snapshots__/ResultsView.test.tsx.snap
@@ -4,7 +4,7 @@ exports[`Results View Should display Base, New and Common graphs with replicates
 <section
   aria-label="Revision Row Details"
   class="MuiBox-root css-13s8wtg"
-  id="_r_c8_"
+  id="_r_bg_"
 >
   <div
     class="MuiStack-root css-1714cpj-MuiStack-root"
@@ -293,9 +293,8 @@ exports[`Results View Should display Base, New and Common graphs with replicates
                 +9.00
                  
                 ms
-                 (+1.5%)
-                 
-                95% CI [
+                 (+1.53%)
+                 95% CI [
                 +0.00
                 , 
                 +18.01
@@ -549,7 +548,7 @@ exports[`Results View Should display Base, New and Common graphs with tooltips 1
 <section
   aria-label="Revision Row Details"
   class="MuiBox-root css-13s8wtg"
-  id="_r_ak_"
+  id="_r_a0_"
 >
   <div
     class="MuiStack-root css-1714cpj-MuiStack-root"
@@ -838,9 +837,8 @@ exports[`Results View Should display Base, New and Common graphs with tooltips 1
                 +8.74
                  
                 ms
-                 (+1.5%)
-                 
-                95% CI [
+                 (+1.46%)
+                 95% CI [
                 +3.27
                 , 
                 +18.16
@@ -1372,7 +1370,7 @@ exports[`Results View The table should match snapshot and other elements should
         </div>
       </div>
       <div
-        class="MuiGrid-root MuiGrid-direction-xs-row MuiGrid-grid-xs-grow css-t3of1j-MuiGrid-root"
+        class="MuiGrid-root MuiGrid-direction-xs-row MuiGrid-grid-xs-grow css-vvfr7q-MuiGrid-root"
       >
         <div
           class="MuiBox-root css-0"
@@ -1450,7 +1448,7 @@ exports[`Results View The table should match snapshot and other elements should
         </div>
       </div>
       <div
-        class="MuiGrid-root MuiGrid-direction-xs-row MuiGrid-grid-xs-grow css-t3of1j-MuiGrid-root"
+        class="MuiGrid-root MuiGrid-direction-xs-row MuiGrid-grid-xs-grow css-wautn6-MuiGrid-root"
       >
         <div
           class="f6hg2jo"
@@ -1467,41 +1465,76 @@ exports[`Results View The table should match snapshot and other elements should
       <div
         class="MuiGrid-root MuiGrid-direction-xs-row MuiGrid-grid-xs-auto css-zh2j38-MuiGrid-root"
       >
-        <label
-          aria-label="Expand all rows"
-          class="MuiFormControlLabel-root MuiFormControlLabel-labelPlacementEnd css-1bsjtco-MuiFormControlLabel-root"
-          data-mui-internal-clone-element="true"
+        <div
+          class="MuiBox-root css-p2w42"
         >
-          <span
-            class="MuiButtonBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall PrivateSwitchBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall css-1nff2up-MuiButtonBase-root-MuiSwitchBase-root-MuiCheckbox-root"
+          <label
+            aria-label="Show the advanced statistics columns (Cliff’s Delta, CLES, Significance)"
+            class="MuiFormControlLabel-root MuiFormControlLabel-labelPlacementEnd css-1bsjtco-MuiFormControlLabel-root"
+            data-mui-internal-clone-element="true"
           >
-            <input
-              class="PrivateSwitchBase-input css-12xagqm-MuiSwitchBase-root"
-              data-indeterminate="false"
-              type="checkbox"
-            />
-            <svg
-              aria-hidden="true"
-              class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
-              data-testid="CheckBoxOutlineBlankIcon"
-              focusable="false"
-              viewBox="0 0 24 24"
+            <span
+              class="MuiButtonBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall PrivateSwitchBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall css-1nff2up-MuiButtonBase-root-MuiSwitchBase-root-MuiCheckbox-root"
             >
-              <path
-                d="M19 5v14H5V5h14m0-2H5c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h14c1.1 0 2-.9 2-2V5c0-1.1-.9-2-2-2z"
+              <input
+                class="PrivateSwitchBase-input css-12xagqm-MuiSwitchBase-root"
+                data-indeterminate="false"
+                type="checkbox"
               />
-            </svg>
-          </span>
-          <span
-            class="MuiTypography-root MuiTypography-body1 MuiFormControlLabel-label css-n290n7-MuiTypography-root"
+              <svg
+                aria-hidden="true"
+                class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
+                data-testid="CheckBoxOutlineBlankIcon"
+                focusable="false"
+                viewBox="0 0 24 24"
+              >
+                <path
+                  d="M19 5v14H5V5h14m0-2H5c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h14c1.1 0 2-.9 2-2V5c0-1.1-.9-2-2-2z"
+                />
+              </svg>
+            </span>
+            <span
+              class="MuiTypography-root MuiTypography-body1 MuiFormControlLabel-label css-n290n7-MuiTypography-root"
+            >
+              Advanced columns
+            </span>
+          </label>
+          <label
+            aria-label="Expand all rows"
+            class="MuiFormControlLabel-root MuiFormControlLabel-labelPlacementEnd css-1bsjtco-MuiFormControlLabel-root"
+            data-mui-internal-clone-element="true"
           >
-            Expand all
-          </span>
-        </label>
+            <span
+              class="MuiButtonBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall PrivateSwitchBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall css-1nff2up-MuiButtonBase-root-MuiSwitchBase-root-MuiCheckbox-root"
+            >
+              <input
+                class="PrivateSwitchBase-input css-12xagqm-MuiSwitchBase-root"
+                data-indeterminate="false"
+                type="checkbox"
+              />
+              <svg
+                aria-hidden="true"
+                class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
+                data-testid="CheckBoxOutlineBlankIcon"
+                focusable="false"
+                viewBox="0 0 24 24"
+              >
+                <path
+                  d="M19 5v14H5V5h14m0-2H5c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h14c1.1 0 2-.9 2-2V5c0-1.1-.9-2-2-2z"
+                />
+              </svg>
+            </span>
+            <span
+              class="MuiTypography-root MuiTypography-body1 MuiFormControlLabel-label css-n290n7-MuiTypography-root"
+            >
+              Expand all
+            </span>
+          </label>
+        </div>
       </div>
     </div>
     <div
-      class="fdtnfac f1l733lh"
+      class="f11g8g7n f1l733lh"
       data-testid="table-header"
       role="row"
     >
@@ -1572,12 +1605,12 @@ exports[`Results View The table should match snapshot and other elements should
         role="columnheader"
       >
         <span
-          aria-label="Median Diff %: The percentage change in median from Base to New: ((New − Base) / Base) × 100."
+          aria-label="Shows how much the middle result changed from Base to New. We line up all the runs from smallest to biggest and pick the middle one for each side, then show the change as a percent. A postive sign means New is higher; a negative sign means New is lower."
           class="MuiBox-root css-1tkq7a4"
           data-mui-internal-clone-element="true"
         >
           <button
-            aria-label="MD (%) (Click to sort by this column)"
+            aria-label="Δ Median % (Click to sort by this column)"
             class="MuiButtonBase-root MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation css-7upxw3-MuiButtonBase-root-MuiButton-root"
             tabindex="0"
             type="button"
@@ -1593,10 +1626,10 @@ exports[`Results View The table should match snapshot and other elements should
                 d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
               />
               <title>
-                Not sorted by MD (%)
+                Not sorted by Δ Median %
               </title>
             </svg>
-            MD (%)
+            Δ Median %
           </button>
         </span>
       </div>
@@ -1635,47 +1668,16 @@ exports[`Results View The table should match snapshot and other elements should
         </button>
       </div>
       <div
-        class="cell delta-header"
-        role="columnheader"
-      >
-        <span
-          class="MuiBox-root css-1tkq7a4"
-          data-mui-internal-clone-element="true"
-        >
-          <button
-            aria-label="CD (Click to sort by this column)"
-            class="MuiButtonBase-root MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation css-7upxw3-MuiButtonBase-root-MuiButton-root"
-            tabindex="0"
-            type="button"
-          >
-            <svg
-              class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-10d4m26-MuiSvgIcon-root"
-              data-testid="SwapVertIcon"
-              focusable="false"
-              role="img"
-              viewBox="0 0 24 24"
-            >
-              <path
-                d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
-              />
-              <title>
-                Not sorted by CD
-              </title>
-            </svg>
-            CD
-          </button>
-        </span>
-      </div>
-      <div
-        class="cell effects-header"
+        class="cell difference-size-header"
         role="columnheader"
       >
         <span
+          aria-label="Shows how big the difference between Base and New is, in plain words: negligible (barely any), small, medium, or large. It comes from how much the Base and New results overlap — the less they overlap, the bigger the difference."
           class="MuiBox-root css-1tkq7a4"
           data-mui-internal-clone-element="true"
         >
           <button
-            aria-label="CLES (%) (Click to sort by this column)"
+            aria-label="Difference Size (Click to sort by this column)"
             class="MuiButtonBase-root MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation css-7upxw3-MuiButtonBase-root-MuiButton-root"
             tabindex="0"
             type="button"
@@ -1691,73 +1693,13 @@ exports[`Results View The table should match snapshot and other elements should
                 d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
               />
               <title>
-                Not sorted by CLES (%)
+                Not sorted by Difference Size
               </title>
             </svg>
-            CLES (%)
+            Difference Size
           </button>
         </span>
       </div>
-      <div
-        class="cell significance-header"
-        role="columnheader"
-      >
-        <div
-          class="MuiButtonGroup-root MuiButtonGroup-contained MuiButtonGroup-horizontal MuiButtonGroup-disableElevation MuiButtonGroup-colorTableHeaderButton css-1fyroww-MuiButtonGroup-root"
-          role="group"
-        >
-          <button
-            aria-label="Sig (Click to sort by this column)"
-            class="MuiButtonBase-root MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButtonGroup-firstButton css-17eldkb-MuiButtonBase-root-MuiButton-root"
-            tabindex="0"
-            type="button"
-          >
-            <svg
-              class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
-              data-testid="SwapVertIcon"
-              focusable="false"
-              role="img"
-              viewBox="0 0 24 24"
-            >
-              <path
-                d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
-              />
-              <title>
-                Not sorted by Sig
-              </title>
-            </svg>
-          </button>
-          <button
-            aria-haspopup="true"
-            aria-label="Sig (Click to filter values)"
-            class="MuiButtonBase-root MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation MuiButtonGroup-lastButton css-l81dbu-MuiButtonBase-root-MuiButton-root"
-            data-mui-internal-clone-element="true"
-            tabindex="0"
-            type="button"
-          >
-            Sig
-            <div
-              aria-label="2 items selected"
-              class="MuiBox-root css-18uhbjh"
-            >
-              (
-              2
-              )
-            </div>
-            <svg
-              aria-hidden="true"
-              class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-120he73-MuiSvgIcon-root"
-              data-testid="KeyboardArrowDownIcon"
-              focusable="false"
-              viewBox="0 0 24 24"
-            >
-              <path
-                d="M7.41 8.59 12 13.17l4.59-4.58L18 10l-6 6-6-6z"
-              />
-            </svg>
-          </button>
-        </div>
-      </div>
       <div
         class="cell trials-header"
         role="columnheader"
@@ -1897,7 +1839,7 @@ exports[`Results View The table should match snapshot and other elements should
               class="revision-block fw0pvlu"
             >
               <div
-                class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1woqe0l"
+                class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1eojgcr"
                 role="row"
               >
                 <div
@@ -1952,7 +1894,7 @@ exports[`Results View The table should match snapshot and other elements should
                   <span
                     style="display: inline-flex; align-items: center; gap: 4px;"
                   >
-                    0 %
+                    +1.85%
                   </span>
                 </div>
                 <div
@@ -1964,19 +1906,7 @@ exports[`Results View The table should match snapshot and other elements should
                   />
                 </div>
                 <div
-                  class="delta cell"
-                  role="cell"
-                >
-                  -
-                </div>
-                <div
-                  class="effects cell"
-                  role="cell"
-                >
-                  -
-                </div>
-                <div
-                  class="significance cell"
+                  class="difference-size cell"
                   role="cell"
                 >
                   -
@@ -2072,7 +2002,7 @@ exports[`Results View The table should match snapshot and other elements should
                     data-testid="expand-revision-button"
                   >
                     <button
-                      aria-controls="_r_1c_"
+                      aria-controls="_r_18_"
                       aria-expanded="false"
                       class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                       tabindex="0"
@@ -2095,7 +2025,7 @@ exports[`Results View The table should match snapshot and other elements should
                 </div>
               </div>
               <div
-                class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1woqe0l"
+                class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1eojgcr"
                 role="row"
               >
                 <div
@@ -2151,7 +2081,7 @@ exports[`Results View The table should match snapshot and other elements should
                   <span
                     style="display: inline-flex; align-items: center; gap: 4px;"
                   >
-                    0 %
+                    +1.08%
                   </span>
                 </div>
                 <div
@@ -2163,19 +2093,7 @@ exports[`Results View The table should match snapshot and other elements should
                   />
                 </div>
                 <div
-                  class="delta cell"
-                  role="cell"
-                >
-                  -
-                </div>
-                <div
-                  class="effects cell"
-                  role="cell"
-                >
-                  -
-                </div>
-                <div
-                  class="significance cell"
+                  class="difference-size cell"
                   role="cell"
                 >
                   -
@@ -2271,7 +2189,7 @@ exports[`Results View The table should match snapshot and other elements should
                     data-testid="expand-revision-button"
                   >
                     <button
-                      aria-controls="_r_1j_"
+                      aria-controls="_r_1f_"
                       aria-expanded="false"
                       class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                       tabindex="0"
@@ -2294,7 +2212,7 @@ exports[`Results View The table should match snapshot and other elements should
                 </div>
               </div>
               <div
-                class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1woqe0l"
+                class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1eojgcr"
                 role="row"
               >
                 <div
@@ -2350,7 +2268,7 @@ exports[`Results View The table should match snapshot and other elements should
                   <span
                     style="display: inline-flex; align-items: center; gap: 4px;"
                   >
-                    0 %
+                    -2.40%
                   </span>
                 </div>
                 <div
@@ -2362,19 +2280,7 @@ exports[`Results View The table should match snapshot and other elements should
                   />
                 </div>
                 <div
-                  class="delta cell"
-                  role="cell"
-                >
-                  -
-                </div>
-                <div
-                  class="effects cell"
-                  role="cell"
-                >
-                  -
-                </div>
-                <div
-                  class="significance cell"
+                  class="difference-size cell"
                   role="cell"
                 >
                   -
@@ -2470,7 +2376,7 @@ exports[`Results View The table should match snapshot and other elements should
                     data-testid="expand-revision-button"
                   >
                     <button
-                      aria-controls="_r_1q_"
+                      aria-controls="_r_1m_"
                       aria-expanded="false"
                       class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                       tabindex="0"
@@ -2493,7 +2399,7 @@ exports[`Results View The table should match snapshot and other elements should
                 </div>
               </div>
               <div
-                class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1woqe0l"
+                class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1eojgcr"
                 role="row"
               >
                 <div
@@ -2549,7 +2455,7 @@ exports[`Results View The table should match snapshot and other elements should
                   <span
                     style="display: inline-flex; align-items: center; gap: 4px;"
                   >
-                    0 %
+                    -2.40%
                   </span>
                 </div>
                 <div
@@ -2561,19 +2467,7 @@ exports[`Results View The table should match snapshot and other elements should
                   />
                 </div>
                 <div
-                  class="delta cell"
-                  role="cell"
-                >
-                  -
-                </div>
-                <div
-                  class="effects cell"
-                  role="cell"
-                >
-                  -
-                </div>
-                <div
-                  class="significance cell"
+                  class="difference-size cell"
                   role="cell"
                 >
                   -
@@ -2669,7 +2563,7 @@ exports[`Results View The table should match snapshot and other elements should
                     data-testid="expand-revision-button"
                   >
                     <button
-                      aria-controls="_r_21_"
+                      aria-controls="_r_1t_"
                       aria-expanded="false"
                       class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                       tabindex="0"
diff --git a/src/__tests__/CompareResults/__snapshots__/SubtestsResultsView.test.tsx.snap b/src/__tests__/CompareResults/__snapshots__/SubtestsResultsView.test.tsx.snap
index 18f8b99f1..f46476d51 100644
--- a/src/__tests__/CompareResults/__snapshots__/SubtestsResultsView.test.tsx.snap
+++ b/src/__tests__/CompareResults/__snapshots__/SubtestsResultsView.test.tsx.snap
@@ -222,7 +222,7 @@ exports[`SubtestsResultsView Component Tests for mann-whitney-u testVersion tabl
 
 exports[`SubtestsResultsView Component Tests for mann-whitney-u testVersion table sorting can sort the table and persist the information to the URL of mann-whitney-u values 6`] = `
 <button
-  aria-label="CLES (%) (Currently sorted by this column. Click to change)"
+  aria-label="CLES % (Currently sorted by this column. Click to change)"
   class="MuiButtonBase-root Mui-focusVisible MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation css-7upxw3-MuiButtonBase-root-MuiButton-root"
   tabindex="0"
   type="button"
@@ -238,10 +238,10 @@ exports[`SubtestsResultsView Component Tests for mann-whitney-u testVersion tabl
       d="M11 6.83 9.41 8.41 8 7l4-4 4 4-1.41 1.41L13 6.83V21h-2z"
     />
     <title>
-      Sorted by CLES (%) in descending order
+      Sorted by CLES % in descending order
     </title>
   </svg>
-  CLES (%)
+  CLES %
   <span
     class="MuiTouchRipple-root css-r3djoj-MuiTouchRipple-root"
   >
@@ -744,7 +744,7 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                           aria-invalid="false"
                           aria-label="Search by title"
                           class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd css-3v3un6-MuiInputBase-input-MuiOutlinedInput-input"
-                          id="_r_n_"
+                          id="_r_i_"
                           placeholder="Filter results"
                           type="search"
                           value=""
@@ -832,6 +832,41 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                     Retrigger test
                   </button>
                 </div>
+                <div
+                  class="MuiGrid-root MuiGrid-direction-xs-row MuiGrid-grid-xs-auto css-1spwhcy-MuiGrid-root"
+                >
+                  <label
+                    aria-label="Show the advanced statistics columns (Cliff’s Delta, CLES, Significance)"
+                    class="MuiFormControlLabel-root MuiFormControlLabel-labelPlacementEnd css-1bsjtco-MuiFormControlLabel-root"
+                    data-mui-internal-clone-element="true"
+                  >
+                    <span
+                      class="MuiButtonBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall PrivateSwitchBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall css-1nff2up-MuiButtonBase-root-MuiSwitchBase-root-MuiCheckbox-root"
+                    >
+                      <input
+                        class="PrivateSwitchBase-input css-12xagqm-MuiSwitchBase-root"
+                        data-indeterminate="false"
+                        type="checkbox"
+                      />
+                      <svg
+                        aria-hidden="true"
+                        class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
+                        data-testid="CheckBoxOutlineBlankIcon"
+                        focusable="false"
+                        viewBox="0 0 24 24"
+                      >
+                        <path
+                          d="M19 5v14H5V5h14m0-2H5c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h14c1.1 0 2-.9 2-2V5c0-1.1-.9-2-2-2z"
+                        />
+                      </svg>
+                    </span>
+                    <span
+                      class="MuiTypography-root MuiTypography-body1 MuiFormControlLabel-label css-n290n7-MuiTypography-root"
+                    >
+                      Advanced columns
+                    </span>
+                  </label>
+                </div>
               </div>
             </header>
             <div
@@ -840,7 +875,7 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
               role="table"
             >
               <div
-                class="f1itjsvw f1l733lh"
+                class="fws74y3 f1l733lh"
                 data-testid="table-header"
                 role="row"
               >
@@ -904,12 +939,12 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                   role="columnheader"
                 >
                   <span
-                    aria-label="Median Diff %: The percentage change in median from Base to New: ((New − Base) / Base) × 100."
+                    aria-label="Shows how much the middle result changed from Base to New. We line up all the runs from smallest to biggest and pick the middle one for each side, then show the change as a percent. A postive sign means New is higher; a negative sign means New is lower."
                     class="MuiBox-root css-1tkq7a4"
                     data-mui-internal-clone-element="true"
                   >
                     <button
-                      aria-label="MD (%) (Click to sort by this column)"
+                      aria-label="Δ Median % (Click to sort by this column)"
                       class="MuiButtonBase-root MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation css-7upxw3-MuiButtonBase-root-MuiButton-root"
                       tabindex="0"
                       type="button"
@@ -925,10 +960,10 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                           d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
                         />
                         <title>
-                          Not sorted by MD (%)
+                          Not sorted by Δ Median %
                         </title>
                       </svg>
-                      MD (%)
+                      Δ Median %
                     </button>
                   </span>
                 </div>
@@ -967,47 +1002,16 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                   </button>
                 </div>
                 <div
-                  class="cell delta-header"
-                  role="columnheader"
-                >
-                  <span
-                    class="MuiBox-root css-1tkq7a4"
-                    data-mui-internal-clone-element="true"
-                  >
-                    <button
-                      aria-label="CD (Click to sort by this column)"
-                      class="MuiButtonBase-root MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation css-7upxw3-MuiButtonBase-root-MuiButton-root"
-                      tabindex="0"
-                      type="button"
-                    >
-                      <svg
-                        class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-10d4m26-MuiSvgIcon-root"
-                        data-testid="SwapVertIcon"
-                        focusable="false"
-                        role="img"
-                        viewBox="0 0 24 24"
-                      >
-                        <path
-                          d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
-                        />
-                        <title>
-                          Not sorted by CD
-                        </title>
-                      </svg>
-                      CD
-                    </button>
-                  </span>
-                </div>
-                <div
-                  class="cell effects-header"
+                  class="cell difference-size-header"
                   role="columnheader"
                 >
                   <span
+                    aria-label="Shows how big the difference between Base and New is, in plain words: negligible (barely any), small, medium, or large. It comes from how much the Base and New results overlap — the less they overlap, the bigger the difference."
                     class="MuiBox-root css-1tkq7a4"
                     data-mui-internal-clone-element="true"
                   >
                     <button
-                      aria-label="CLES (%) (Click to sort by this column)"
+                      aria-label="Difference Size (Click to sort by this column)"
                       class="MuiButtonBase-root MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation css-7upxw3-MuiButtonBase-root-MuiButton-root"
                       tabindex="0"
                       type="button"
@@ -1023,73 +1027,13 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                           d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
                         />
                         <title>
-                          Not sorted by CLES (%)
+                          Not sorted by Difference Size
                         </title>
                       </svg>
-                      CLES (%)
+                      Difference Size
                     </button>
                   </span>
                 </div>
-                <div
-                  class="cell significance-header"
-                  role="columnheader"
-                >
-                  <div
-                    class="MuiButtonGroup-root MuiButtonGroup-contained MuiButtonGroup-horizontal MuiButtonGroup-disableElevation MuiButtonGroup-colorTableHeaderButton css-1fyroww-MuiButtonGroup-root"
-                    role="group"
-                  >
-                    <button
-                      aria-label="Sig (Click to sort by this column)"
-                      class="MuiButtonBase-root MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButtonGroup-firstButton css-17eldkb-MuiButtonBase-root-MuiButton-root"
-                      tabindex="0"
-                      type="button"
-                    >
-                      <svg
-                        class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
-                        data-testid="SwapVertIcon"
-                        focusable="false"
-                        role="img"
-                        viewBox="0 0 24 24"
-                      >
-                        <path
-                          d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
-                        />
-                        <title>
-                          Not sorted by Sig
-                        </title>
-                      </svg>
-                    </button>
-                    <button
-                      aria-haspopup="true"
-                      aria-label="Sig (Click to filter values)"
-                      class="MuiButtonBase-root MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation MuiButtonGroup-lastButton css-l81dbu-MuiButtonBase-root-MuiButton-root"
-                      data-mui-internal-clone-element="true"
-                      tabindex="0"
-                      type="button"
-                    >
-                      Sig
-                      <div
-                        aria-label="2 items selected"
-                        class="MuiBox-root css-18uhbjh"
-                      >
-                        (
-                        2
-                        )
-                      </div>
-                      <svg
-                        aria-hidden="true"
-                        class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-120he73-MuiSvgIcon-root"
-                        data-testid="KeyboardArrowDownIcon"
-                        focusable="false"
-                        viewBox="0 0 24 24"
-                      >
-                        <path
-                          d="M7.41 8.59 12 13.17l4.59-4.58L18 10l-6 6-6-6z"
-                        />
-                      </svg>
-                    </button>
-                  </div>
-                </div>
                 <div
                   class="cell trials-header"
                   role="columnheader"
@@ -1112,7 +1056,7 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                 />
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-185znds"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
                 role="row"
               >
                 <div
@@ -1163,7 +1107,7 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                   <span
                     style="display: inline-flex; align-items: center; gap: 4px;"
                   >
-                    0 %
+                    +1.14%
                   </span>
                 </div>
                 <div
@@ -1175,20 +1119,7 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                   />
                 </div>
                 <div
-                  class="delta cell"
-                  role="cell"
-                >
-                   
-                  -
-                </div>
-                <div
-                  class="effects cell"
-                  role="cell"
-                >
-                  0.00% 
-                </div>
-                <div
-                  class="significance cell"
+                  class="difference-size cell"
                   role="cell"
                 >
                   -
@@ -1252,7 +1183,7 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_t_"
+                    aria-controls="_r_p_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -1274,7 +1205,7 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                 </div>
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-185znds"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
                 role="row"
               >
                 <div
@@ -1311,7 +1242,7 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                   <span
                     style="display: inline-flex; align-items: center; gap: 4px;"
                   >
-                    0 %
+                    +1.14%
                   </span>
                 </div>
                 <div
@@ -1323,20 +1254,7 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                   />
                 </div>
                 <div
-                  class="delta cell"
-                  role="cell"
-                >
-                   
-                  -
-                </div>
-                <div
-                  class="effects cell"
-                  role="cell"
-                >
-                  0.00% 
-                </div>
-                <div
-                  class="significance cell"
+                  class="difference-size cell"
                   role="cell"
                 >
                   -
@@ -1400,7 +1318,7 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_10_"
+                    aria-controls="_r_s_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -1422,7 +1340,7 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                 </div>
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-185znds"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
                 role="row"
               >
                 <div
@@ -1459,7 +1377,7 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                   <span
                     style="display: inline-flex; align-items: center; gap: 4px;"
                   >
-                    0 %
+                    +1.14%
                   </span>
                 </div>
                 <div
@@ -1471,20 +1389,7 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                   />
                 </div>
                 <div
-                  class="delta cell"
-                  role="cell"
-                >
-                   
-                  -
-                </div>
-                <div
-                  class="effects cell"
-                  role="cell"
-                >
-                  0.00% 
-                </div>
-                <div
-                  class="significance cell"
+                  class="difference-size cell"
                   role="cell"
                 >
                   -
@@ -1548,7 +1453,7 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_13_"
+                    aria-controls="_r_v_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -1570,7 +1475,7 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                 </div>
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-185znds"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
                 role="row"
               >
                 <div
@@ -1607,7 +1512,7 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                   <span
                     style="display: inline-flex; align-items: center; gap: 4px;"
                   >
-                    0 %
+                    +1.14%
                   </span>
                 </div>
                 <div
@@ -1619,20 +1524,7 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                   />
                 </div>
                 <div
-                  class="delta cell"
-                  role="cell"
-                >
-                   
-                  -
-                </div>
-                <div
-                  class="effects cell"
-                  role="cell"
-                >
-                  0.00% 
-                </div>
-                <div
-                  class="significance cell"
+                  class="difference-size cell"
                   role="cell"
                 >
                   -
@@ -1696,7 +1588,7 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_16_"
+                    aria-controls="_r_12_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -1718,7 +1610,7 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                 </div>
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-185znds"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
                 role="row"
               >
                 <div
@@ -1755,7 +1647,7 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                   <span
                     style="display: inline-flex; align-items: center; gap: 4px;"
                   >
-                    0 %
+                    +0.98%
                   </span>
                 </div>
                 <div
@@ -1767,20 +1659,7 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                   />
                 </div>
                 <div
-                  class="delta cell"
-                  role="cell"
-                >
-                   
-                  -
-                </div>
-                <div
-                  class="effects cell"
-                  role="cell"
-                >
-                  0.00% 
-                </div>
-                <div
-                  class="significance cell"
+                  class="difference-size cell"
                   role="cell"
                 >
                   -
@@ -1844,7 +1723,7 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_19_"
+                    aria-controls="_r_15_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -2655,7 +2534,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                           aria-invalid="false"
                           aria-label="Search by title"
                           class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd css-3v3un6-MuiInputBase-input-MuiOutlinedInput-input"
-                          id="_r_sl_"
+                          id="_r_r3_"
                           placeholder="Filter results"
                           type="search"
                           value=""
@@ -2743,6 +2622,41 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                     Retrigger test
                   </button>
                 </div>
+                <div
+                  class="MuiGrid-root MuiGrid-direction-xs-row MuiGrid-grid-xs-auto css-1spwhcy-MuiGrid-root"
+                >
+                  <label
+                    aria-label="Show the advanced statistics columns (Cliff’s Delta, CLES, Significance)"
+                    class="MuiFormControlLabel-root MuiFormControlLabel-labelPlacementEnd css-1bsjtco-MuiFormControlLabel-root"
+                    data-mui-internal-clone-element="true"
+                  >
+                    <span
+                      class="MuiButtonBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall PrivateSwitchBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall css-1nff2up-MuiButtonBase-root-MuiSwitchBase-root-MuiCheckbox-root"
+                    >
+                      <input
+                        class="PrivateSwitchBase-input css-12xagqm-MuiSwitchBase-root"
+                        data-indeterminate="false"
+                        type="checkbox"
+                      />
+                      <svg
+                        aria-hidden="true"
+                        class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
+                        data-testid="CheckBoxOutlineBlankIcon"
+                        focusable="false"
+                        viewBox="0 0 24 24"
+                      >
+                        <path
+                          d="M19 5v14H5V5h14m0-2H5c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h14c1.1 0 2-.9 2-2V5c0-1.1-.9-2-2-2z"
+                        />
+                      </svg>
+                    </span>
+                    <span
+                      class="MuiTypography-root MuiTypography-body1 MuiFormControlLabel-label css-n290n7-MuiTypography-root"
+                    >
+                      Advanced columns
+                    </span>
+                  </label>
+                </div>
               </div>
             </header>
             <div
@@ -2751,7 +2665,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
               role="table"
             >
               <div
-                class="f1itjsvw f1l733lh"
+                class="fws74y3 f1l733lh"
                 data-testid="table-header"
                 role="row"
               >
@@ -2815,12 +2729,12 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   role="columnheader"
                 >
                   <span
-                    aria-label="Median Diff %: The percentage change in median from Base to New: ((New − Base) / Base) × 100."
+                    aria-label="Shows how much the middle result changed from Base to New. We line up all the runs from smallest to biggest and pick the middle one for each side, then show the change as a percent. A postive sign means New is higher; a negative sign means New is lower."
                     class="MuiBox-root css-1tkq7a4"
                     data-mui-internal-clone-element="true"
                   >
                     <button
-                      aria-label="MD (%) (Click to sort by this column)"
+                      aria-label="Δ Median % (Click to sort by this column)"
                       class="MuiButtonBase-root MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation css-7upxw3-MuiButtonBase-root-MuiButton-root"
                       tabindex="0"
                       type="button"
@@ -2836,10 +2750,10 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                           d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
                         />
                         <title>
-                          Not sorted by MD (%)
+                          Not sorted by Δ Median %
                         </title>
                       </svg>
-                      MD (%)
+                      Δ Median %
                     </button>
                   </span>
                 </div>
@@ -2878,47 +2792,16 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   </button>
                 </div>
                 <div
-                  class="cell delta-header"
-                  role="columnheader"
-                >
-                  <span
-                    class="MuiBox-root css-1tkq7a4"
-                    data-mui-internal-clone-element="true"
-                  >
-                    <button
-                      aria-label="CD (Click to sort by this column)"
-                      class="MuiButtonBase-root MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation css-7upxw3-MuiButtonBase-root-MuiButton-root"
-                      tabindex="0"
-                      type="button"
-                    >
-                      <svg
-                        class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-10d4m26-MuiSvgIcon-root"
-                        data-testid="SwapVertIcon"
-                        focusable="false"
-                        role="img"
-                        viewBox="0 0 24 24"
-                      >
-                        <path
-                          d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
-                        />
-                        <title>
-                          Not sorted by CD
-                        </title>
-                      </svg>
-                      CD
-                    </button>
-                  </span>
-                </div>
-                <div
-                  class="cell effects-header"
+                  class="cell difference-size-header"
                   role="columnheader"
                 >
                   <span
+                    aria-label="Shows how big the difference between Base and New is, in plain words: negligible (barely any), small, medium, or large. It comes from how much the Base and New results overlap — the less they overlap, the bigger the difference."
                     class="MuiBox-root css-1tkq7a4"
                     data-mui-internal-clone-element="true"
                   >
                     <button
-                      aria-label="CLES (%) (Click to sort by this column)"
+                      aria-label="Difference Size (Click to sort by this column)"
                       class="MuiButtonBase-root MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation css-7upxw3-MuiButtonBase-root-MuiButton-root"
                       tabindex="0"
                       type="button"
@@ -2934,73 +2817,13 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                           d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
                         />
                         <title>
-                          Not sorted by CLES (%)
+                          Not sorted by Difference Size
                         </title>
                       </svg>
-                      CLES (%)
+                      Difference Size
                     </button>
                   </span>
                 </div>
-                <div
-                  class="cell significance-header"
-                  role="columnheader"
-                >
-                  <div
-                    class="MuiButtonGroup-root MuiButtonGroup-contained MuiButtonGroup-horizontal MuiButtonGroup-disableElevation MuiButtonGroup-colorTableHeaderButton css-1fyroww-MuiButtonGroup-root"
-                    role="group"
-                  >
-                    <button
-                      aria-label="Sig (Click to sort by this column)"
-                      class="MuiButtonBase-root MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButtonGroup-firstButton css-17eldkb-MuiButtonBase-root-MuiButton-root"
-                      tabindex="0"
-                      type="button"
-                    >
-                      <svg
-                        class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
-                        data-testid="SwapVertIcon"
-                        focusable="false"
-                        role="img"
-                        viewBox="0 0 24 24"
-                      >
-                        <path
-                          d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
-                        />
-                        <title>
-                          Not sorted by Sig
-                        </title>
-                      </svg>
-                    </button>
-                    <button
-                      aria-haspopup="true"
-                      aria-label="Sig (Click to filter values)"
-                      class="MuiButtonBase-root MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation MuiButtonGroup-lastButton css-l81dbu-MuiButtonBase-root-MuiButton-root"
-                      data-mui-internal-clone-element="true"
-                      tabindex="0"
-                      type="button"
-                    >
-                      Sig
-                      <div
-                        aria-label="2 items selected"
-                        class="MuiBox-root css-18uhbjh"
-                      >
-                        (
-                        2
-                        )
-                      </div>
-                      <svg
-                        aria-hidden="true"
-                        class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-120he73-MuiSvgIcon-root"
-                        data-testid="KeyboardArrowDownIcon"
-                        focusable="false"
-                        viewBox="0 0 24 24"
-                      >
-                        <path
-                          d="M7.41 8.59 12 13.17l4.59-4.58L18 10l-6 6-6-6z"
-                        />
-                      </svg>
-                    </button>
-                  </div>
-                </div>
                 <div
                   class="cell trials-header"
                   role="columnheader"
@@ -3023,7 +2846,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                 />
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-185znds"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
                 role="row"
               >
                 <div
@@ -3076,7 +2899,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   <span
                     style="display: inline-flex; align-items: center; gap: 4px;"
                   >
-                    0.963 %
+                    +1.14%
                   </span>
                 </div>
                 <div
@@ -3088,23 +2911,10 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   />
                 </div>
                 <div
-                  class="delta cell"
-                  role="cell"
-                >
-                   
-                  -0.04
-                </div>
-                <div
-                  class="effects cell"
-                  role="cell"
-                >
-                  15.00% 
-                </div>
-                <div
-                  class="significance cell"
+                  class="difference-size cell"
                   role="cell"
                 >
-                  -
+                  Negligible
                 </div>
                 <div
                   class="total-runs cell"
@@ -3165,7 +2975,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_sr_"
+                    aria-controls="_r_ra_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -3187,7 +2997,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                 </div>
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-185znds"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
                 role="row"
               >
                 <div
@@ -3226,7 +3036,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   <span
                     style="display: inline-flex; align-items: center; gap: 4px;"
                   >
-                    1.135 %
+                    +1.14%
                   </span>
                 </div>
                 <div
@@ -3251,41 +3061,15 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   </div>
                 </div>
                 <div
-                  class="delta cell"
-                  role="cell"
-                >
-                   
-                  0.02
-                </div>
-                <div
-                  class="effects cell"
+                  class="difference-size cell"
                   role="cell"
                 >
-                  60.00% 
+                  Negligible
                 </div>
                 <div
-                  class="significance cell"
+                  class="total-runs cell"
                   role="cell"
-                >
-                  <svg
-                    aria-hidden="true"
-                    class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
-                    data-testid="KeyboardDoubleArrowUpIcon"
-                    focusable="false"
-                    viewBox="0 0 24 24"
-                  >
-                    <path
-                      d="M6 17.59 7.41 19 12 14.42 16.59 19 18 17.59l-6-6z"
-                    />
-                    <path
-                      d="m6 11 1.41 1.41L12 7.83l4.59 4.58L18 11l-6-6z"
-                    />
-                  </svg>
-                </div>
-                <div
-                  class="total-runs cell"
-                  role="cell"
-                  title="Base runs: 0, New runs: 0"
+                  title="Base runs: 0, New runs: 0"
                 >
                   <span>
                     <span>
@@ -3341,7 +3125,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_su_"
+                    aria-controls="_r_rd_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -3363,7 +3147,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                 </div>
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-185znds"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
                 role="row"
               >
                 <div
@@ -3402,7 +3186,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   <span
                     style="display: inline-flex; align-items: center; gap: 4px;"
                   >
-                    0.963 %
+                    +1.14%
                   </span>
                 </div>
                 <div
@@ -3414,36 +3198,10 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   />
                 </div>
                 <div
-                  class="delta cell"
-                  role="cell"
-                >
-                   
-                  -0.05
-                </div>
-                <div
-                  class="effects cell"
+                  class="difference-size cell"
                   role="cell"
                 >
-                  50.00% 
-                </div>
-                <div
-                  class="significance cell"
-                  role="cell"
-                >
-                  <svg
-                    aria-hidden="true"
-                    class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
-                    data-testid="KeyboardDoubleArrowUpIcon"
-                    focusable="false"
-                    viewBox="0 0 24 24"
-                  >
-                    <path
-                      d="M6 17.59 7.41 19 12 14.42 16.59 19 18 17.59l-6-6z"
-                    />
-                    <path
-                      d="m6 11 1.41 1.41L12 7.83l4.59 4.58L18 11l-6-6z"
-                    />
-                  </svg>
+                  Negligible
                 </div>
                 <div
                   class="total-runs cell"
@@ -3504,7 +3262,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_t1_"
+                    aria-controls="_r_rg_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -3526,7 +3284,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                 </div>
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-185znds"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
                 role="row"
               >
                 <div
@@ -3565,7 +3323,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   <span
                     style="display: inline-flex; align-items: center; gap: 4px;"
                   >
-                    1.135 %
+                    +1.14%
                   </span>
                 </div>
                 <div
@@ -3577,36 +3335,10 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   />
                 </div>
                 <div
-                  class="delta cell"
-                  role="cell"
-                >
-                   
-                  0.12
-                </div>
-                <div
-                  class="effects cell"
-                  role="cell"
-                >
-                  25.00% 
-                </div>
-                <div
-                  class="significance cell"
+                  class="difference-size cell"
                   role="cell"
                 >
-                  <svg
-                    aria-hidden="true"
-                    class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
-                    data-testid="KeyboardDoubleArrowUpIcon"
-                    focusable="false"
-                    viewBox="0 0 24 24"
-                  >
-                    <path
-                      d="M6 17.59 7.41 19 12 14.42 16.59 19 18 17.59l-6-6z"
-                    />
-                    <path
-                      d="m6 11 1.41 1.41L12 7.83l4.59 4.58L18 11l-6-6z"
-                    />
-                  </svg>
+                  Small
                 </div>
                 <div
                   class="total-runs cell"
@@ -3667,7 +3399,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_t4_"
+                    aria-controls="_r_rj_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -3689,7 +3421,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                 </div>
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-185znds"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
                 role="row"
               >
                 <div
@@ -3728,7 +3460,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   <span
                     style="display: inline-flex; align-items: center; gap: 4px;"
                   >
-                    0.98 %
+                    +0.98%
                   </span>
                 </div>
                 <div
@@ -3753,23 +3485,10 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   </div>
                 </div>
                 <div
-                  class="delta cell"
-                  role="cell"
-                >
-                   
-                  0.01
-                </div>
-                <div
-                  class="effects cell"
-                  role="cell"
-                >
-                  45.00% 
-                </div>
-                <div
-                  class="significance cell"
+                  class="difference-size cell"
                   role="cell"
                 >
-                  -
+                  Negligible
                 </div>
                 <div
                   class="total-runs cell"
@@ -3830,7 +3549,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_t7_"
+                    aria-controls="_r_rm_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -4257,7 +3976,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                           aria-invalid="false"
                           aria-label="Search by title"
                           class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd css-3v3un6-MuiInputBase-input-MuiOutlinedInput-input"
-                          id="_r_ps_"
+                          id="_r_oi_"
                           placeholder="Filter results"
                           type="search"
                           value=""
@@ -4345,6 +4064,41 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                     Retrigger test
                   </button>
                 </div>
+                <div
+                  class="MuiGrid-root MuiGrid-direction-xs-row MuiGrid-grid-xs-auto css-1spwhcy-MuiGrid-root"
+                >
+                  <label
+                    aria-label="Show the advanced statistics columns (Cliff’s Delta, CLES, Significance)"
+                    class="MuiFormControlLabel-root MuiFormControlLabel-labelPlacementEnd css-1bsjtco-MuiFormControlLabel-root"
+                    data-mui-internal-clone-element="true"
+                  >
+                    <span
+                      class="MuiButtonBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall PrivateSwitchBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall css-1nff2up-MuiButtonBase-root-MuiSwitchBase-root-MuiCheckbox-root"
+                    >
+                      <input
+                        class="PrivateSwitchBase-input css-12xagqm-MuiSwitchBase-root"
+                        data-indeterminate="false"
+                        type="checkbox"
+                      />
+                      <svg
+                        aria-hidden="true"
+                        class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
+                        data-testid="CheckBoxOutlineBlankIcon"
+                        focusable="false"
+                        viewBox="0 0 24 24"
+                      >
+                        <path
+                          d="M19 5v14H5V5h14m0-2H5c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h14c1.1 0 2-.9 2-2V5c0-1.1-.9-2-2-2z"
+                        />
+                      </svg>
+                    </span>
+                    <span
+                      class="MuiTypography-root MuiTypography-body1 MuiFormControlLabel-label css-n290n7-MuiTypography-root"
+                    >
+                      Advanced columns
+                    </span>
+                  </label>
+                </div>
               </div>
             </header>
             <div
@@ -4353,7 +4107,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
               role="table"
             >
               <div
-                class="f1itjsvw f1l733lh"
+                class="fws74y3 f1l733lh"
                 data-testid="table-header"
                 role="row"
               >
@@ -4417,12 +4171,12 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   role="columnheader"
                 >
                   <span
-                    aria-label="Median Diff %: The percentage change in median from Base to New: ((New − Base) / Base) × 100."
+                    aria-label="Shows how much the middle result changed from Base to New. We line up all the runs from smallest to biggest and pick the middle one for each side, then show the change as a percent. A postive sign means New is higher; a negative sign means New is lower."
                     class="MuiBox-root css-1tkq7a4"
                     data-mui-internal-clone-element="true"
                   >
                     <button
-                      aria-label="MD (%) (Click to sort by this column)"
+                      aria-label="Δ Median % (Click to sort by this column)"
                       class="MuiButtonBase-root MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation css-7upxw3-MuiButtonBase-root-MuiButton-root"
                       tabindex="0"
                       type="button"
@@ -4438,10 +4192,10 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                           d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
                         />
                         <title>
-                          Not sorted by MD (%)
+                          Not sorted by Δ Median %
                         </title>
                       </svg>
-                      MD (%)
+                      Δ Median %
                     </button>
                   </span>
                 </div>
@@ -4480,47 +4234,16 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   </button>
                 </div>
                 <div
-                  class="cell delta-header"
-                  role="columnheader"
-                >
-                  <span
-                    class="MuiBox-root css-1tkq7a4"
-                    data-mui-internal-clone-element="true"
-                  >
-                    <button
-                      aria-label="CD (Click to sort by this column)"
-                      class="MuiButtonBase-root MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation css-7upxw3-MuiButtonBase-root-MuiButton-root"
-                      tabindex="0"
-                      type="button"
-                    >
-                      <svg
-                        class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-10d4m26-MuiSvgIcon-root"
-                        data-testid="SwapVertIcon"
-                        focusable="false"
-                        role="img"
-                        viewBox="0 0 24 24"
-                      >
-                        <path
-                          d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
-                        />
-                        <title>
-                          Not sorted by CD
-                        </title>
-                      </svg>
-                      CD
-                    </button>
-                  </span>
-                </div>
-                <div
-                  class="cell effects-header"
+                  class="cell difference-size-header"
                   role="columnheader"
                 >
                   <span
+                    aria-label="Shows how big the difference between Base and New is, in plain words: negligible (barely any), small, medium, or large. It comes from how much the Base and New results overlap — the less they overlap, the bigger the difference."
                     class="MuiBox-root css-1tkq7a4"
                     data-mui-internal-clone-element="true"
                   >
                     <button
-                      aria-label="CLES (%) (Click to sort by this column)"
+                      aria-label="Difference Size (Click to sort by this column)"
                       class="MuiButtonBase-root MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation css-7upxw3-MuiButtonBase-root-MuiButton-root"
                       tabindex="0"
                       type="button"
@@ -4536,73 +4259,13 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                           d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
                         />
                         <title>
-                          Not sorted by CLES (%)
+                          Not sorted by Difference Size
                         </title>
                       </svg>
-                      CLES (%)
+                      Difference Size
                     </button>
                   </span>
                 </div>
-                <div
-                  class="cell significance-header"
-                  role="columnheader"
-                >
-                  <div
-                    class="MuiButtonGroup-root MuiButtonGroup-contained MuiButtonGroup-horizontal MuiButtonGroup-disableElevation MuiButtonGroup-colorTableHeaderButton css-1fyroww-MuiButtonGroup-root"
-                    role="group"
-                  >
-                    <button
-                      aria-label="Sig (Click to sort by this column)"
-                      class="MuiButtonBase-root MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButtonGroup-firstButton css-17eldkb-MuiButtonBase-root-MuiButton-root"
-                      tabindex="0"
-                      type="button"
-                    >
-                      <svg
-                        class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
-                        data-testid="SwapVertIcon"
-                        focusable="false"
-                        role="img"
-                        viewBox="0 0 24 24"
-                      >
-                        <path
-                          d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
-                        />
-                        <title>
-                          Not sorted by Sig
-                        </title>
-                      </svg>
-                    </button>
-                    <button
-                      aria-haspopup="true"
-                      aria-label="Sig (Click to filter values)"
-                      class="MuiButtonBase-root MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation MuiButtonGroup-lastButton css-l81dbu-MuiButtonBase-root-MuiButton-root"
-                      data-mui-internal-clone-element="true"
-                      tabindex="0"
-                      type="button"
-                    >
-                      Sig
-                      <div
-                        aria-label="2 items selected"
-                        class="MuiBox-root css-18uhbjh"
-                      >
-                        (
-                        2
-                        )
-                      </div>
-                      <svg
-                        aria-hidden="true"
-                        class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-120he73-MuiSvgIcon-root"
-                        data-testid="KeyboardArrowDownIcon"
-                        focusable="false"
-                        viewBox="0 0 24 24"
-                      >
-                        <path
-                          d="M7.41 8.59 12 13.17l4.59-4.58L18 10l-6 6-6-6z"
-                        />
-                      </svg>
-                    </button>
-                  </div>
-                </div>
                 <div
                   class="cell trials-header"
                   role="columnheader"
@@ -4625,7 +4288,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                 />
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-185znds"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
                 role="row"
               >
                 <div
@@ -4678,7 +4341,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   <span
                     style="display: inline-flex; align-items: center; gap: 4px;"
                   >
-                    0.963 %
+                    +1.14%
                   </span>
                 </div>
                 <div
@@ -4690,23 +4353,10 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   />
                 </div>
                 <div
-                  class="delta cell"
-                  role="cell"
-                >
-                   
-                  -0.04
-                </div>
-                <div
-                  class="effects cell"
-                  role="cell"
-                >
-                  15.00% 
-                </div>
-                <div
-                  class="significance cell"
+                  class="difference-size cell"
                   role="cell"
                 >
-                  -
+                  Negligible
                 </div>
                 <div
                   class="total-runs cell"
@@ -4767,7 +4417,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_q2_"
+                    aria-controls="_r_op_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -4789,7 +4439,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                 </div>
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-185znds"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
                 role="row"
               >
                 <div
@@ -4828,7 +4478,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   <span
                     style="display: inline-flex; align-items: center; gap: 4px;"
                   >
-                    1.135 %
+                    +1.14%
                   </span>
                 </div>
                 <div
@@ -4853,36 +4503,10 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   </div>
                 </div>
                 <div
-                  class="delta cell"
-                  role="cell"
-                >
-                   
-                  0.02
-                </div>
-                <div
-                  class="effects cell"
-                  role="cell"
-                >
-                  60.00% 
-                </div>
-                <div
-                  class="significance cell"
+                  class="difference-size cell"
                   role="cell"
                 >
-                  <svg
-                    aria-hidden="true"
-                    class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
-                    data-testid="KeyboardDoubleArrowUpIcon"
-                    focusable="false"
-                    viewBox="0 0 24 24"
-                  >
-                    <path
-                      d="M6 17.59 7.41 19 12 14.42 16.59 19 18 17.59l-6-6z"
-                    />
-                    <path
-                      d="m6 11 1.41 1.41L12 7.83l4.59 4.58L18 11l-6-6z"
-                    />
-                  </svg>
+                  Negligible
                 </div>
                 <div
                   class="total-runs cell"
@@ -4943,7 +4567,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_q5_"
+                    aria-controls="_r_os_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -4965,7 +4589,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                 </div>
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-185znds"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
                 role="row"
               >
                 <div
@@ -5004,7 +4628,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   <span
                     style="display: inline-flex; align-items: center; gap: 4px;"
                   >
-                    0.963 %
+                    +1.14%
                   </span>
                 </div>
                 <div
@@ -5016,36 +4640,10 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   />
                 </div>
                 <div
-                  class="delta cell"
-                  role="cell"
-                >
-                   
-                  -0.05
-                </div>
-                <div
-                  class="effects cell"
-                  role="cell"
-                >
-                  50.00% 
-                </div>
-                <div
-                  class="significance cell"
+                  class="difference-size cell"
                   role="cell"
                 >
-                  <svg
-                    aria-hidden="true"
-                    class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
-                    data-testid="KeyboardDoubleArrowUpIcon"
-                    focusable="false"
-                    viewBox="0 0 24 24"
-                  >
-                    <path
-                      d="M6 17.59 7.41 19 12 14.42 16.59 19 18 17.59l-6-6z"
-                    />
-                    <path
-                      d="m6 11 1.41 1.41L12 7.83l4.59 4.58L18 11l-6-6z"
-                    />
-                  </svg>
+                  Negligible
                 </div>
                 <div
                   class="total-runs cell"
@@ -5106,7 +4704,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_q8_"
+                    aria-controls="_r_ov_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -5128,7 +4726,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                 </div>
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-185znds"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
                 role="row"
               >
                 <div
@@ -5167,7 +4765,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   <span
                     style="display: inline-flex; align-items: center; gap: 4px;"
                   >
-                    1.135 %
+                    +1.14%
                   </span>
                 </div>
                 <div
@@ -5179,36 +4777,10 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   />
                 </div>
                 <div
-                  class="delta cell"
-                  role="cell"
-                >
-                   
-                  0.12
-                </div>
-                <div
-                  class="effects cell"
-                  role="cell"
-                >
-                  25.00% 
-                </div>
-                <div
-                  class="significance cell"
+                  class="difference-size cell"
                   role="cell"
                 >
-                  <svg
-                    aria-hidden="true"
-                    class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
-                    data-testid="KeyboardDoubleArrowUpIcon"
-                    focusable="false"
-                    viewBox="0 0 24 24"
-                  >
-                    <path
-                      d="M6 17.59 7.41 19 12 14.42 16.59 19 18 17.59l-6-6z"
-                    />
-                    <path
-                      d="m6 11 1.41 1.41L12 7.83l4.59 4.58L18 11l-6-6z"
-                    />
-                  </svg>
+                  Small
                 </div>
                 <div
                   class="total-runs cell"
@@ -5269,7 +4841,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_qb_"
+                    aria-controls="_r_p2_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -5291,7 +4863,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                 </div>
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-185znds"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
                 role="row"
               >
                 <div
@@ -5330,7 +4902,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   <span
                     style="display: inline-flex; align-items: center; gap: 4px;"
                   >
-                    0.98 %
+                    +0.98%
                   </span>
                 </div>
                 <div
@@ -5355,23 +4927,10 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   </div>
                 </div>
                 <div
-                  class="delta cell"
-                  role="cell"
-                >
-                   
-                  0.01
-                </div>
-                <div
-                  class="effects cell"
-                  role="cell"
-                >
-                  45.00% 
-                </div>
-                <div
-                  class="significance cell"
+                  class="difference-size cell"
                   role="cell"
                 >
-                  -
+                  Negligible
                 </div>
                 <div
                   class="total-runs cell"
@@ -5432,7 +4991,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_qe_"
+                    aria-controls="_r_p5_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -5859,7 +5418,7 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                           aria-invalid="false"
                           aria-label="Search by title"
                           class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd css-3v3un6-MuiInputBase-input-MuiOutlinedInput-input"
-                          id="_r_g6_"
+                          id="_r_f4_"
                           placeholder="Filter results"
                           type="search"
                           value=""
@@ -5947,6 +5506,41 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                     Retrigger test
                   </button>
                 </div>
+                <div
+                  class="MuiGrid-root MuiGrid-direction-xs-row MuiGrid-grid-xs-auto css-1spwhcy-MuiGrid-root"
+                >
+                  <label
+                    aria-label="Show the advanced statistics columns (Cliff’s Delta, CLES, Significance)"
+                    class="MuiFormControlLabel-root MuiFormControlLabel-labelPlacementEnd css-1bsjtco-MuiFormControlLabel-root"
+                    data-mui-internal-clone-element="true"
+                  >
+                    <span
+                      class="MuiButtonBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall PrivateSwitchBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall css-1nff2up-MuiButtonBase-root-MuiSwitchBase-root-MuiCheckbox-root"
+                    >
+                      <input
+                        class="PrivateSwitchBase-input css-12xagqm-MuiSwitchBase-root"
+                        data-indeterminate="false"
+                        type="checkbox"
+                      />
+                      <svg
+                        aria-hidden="true"
+                        class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
+                        data-testid="CheckBoxOutlineBlankIcon"
+                        focusable="false"
+                        viewBox="0 0 24 24"
+                      >
+                        <path
+                          d="M19 5v14H5V5h14m0-2H5c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h14c1.1 0 2-.9 2-2V5c0-1.1-.9-2-2-2z"
+                        />
+                      </svg>
+                    </span>
+                    <span
+                      class="MuiTypography-root MuiTypography-body1 MuiFormControlLabel-label css-n290n7-MuiTypography-root"
+                    >
+                      Advanced columns
+                    </span>
+                  </label>
+                </div>
               </div>
             </header>
             <div
@@ -5955,7 +5549,7 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
               role="table"
             >
               <div
-                class="f1itjsvw f1l733lh"
+                class="fws74y3 f1l733lh"
                 data-testid="table-header"
                 role="row"
               >
@@ -6019,12 +5613,12 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                   role="columnheader"
                 >
                   <span
-                    aria-label="Median Diff %: The percentage change in median from Base to New: ((New − Base) / Base) × 100."
+                    aria-label="Shows how much the middle result changed from Base to New. We line up all the runs from smallest to biggest and pick the middle one for each side, then show the change as a percent. A postive sign means New is higher; a negative sign means New is lower."
                     class="MuiBox-root css-1tkq7a4"
                     data-mui-internal-clone-element="true"
                   >
                     <button
-                      aria-label="MD (%) (Click to sort by this column)"
+                      aria-label="Δ Median % (Click to sort by this column)"
                       class="MuiButtonBase-root MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation css-7upxw3-MuiButtonBase-root-MuiButton-root"
                       tabindex="0"
                       type="button"
@@ -6040,10 +5634,10 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                           d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
                         />
                         <title>
-                          Not sorted by MD (%)
+                          Not sorted by Δ Median %
                         </title>
                       </svg>
-                      MD (%)
+                      Δ Median %
                     </button>
                   </span>
                 </div>
@@ -6082,15 +5676,16 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                   </button>
                 </div>
                 <div
-                  class="cell delta-header"
+                  class="cell difference-size-header"
                   role="columnheader"
                 >
                   <span
+                    aria-label="Shows how big the difference between Base and New is, in plain words: negligible (barely any), small, medium, or large. It comes from how much the Base and New results overlap — the less they overlap, the bigger the difference."
                     class="MuiBox-root css-1tkq7a4"
                     data-mui-internal-clone-element="true"
                   >
                     <button
-                      aria-label="CD (Click to sort by this column)"
+                      aria-label="Difference Size (Click to sort by this column)"
                       class="MuiButtonBase-root MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation css-7upxw3-MuiButtonBase-root-MuiButton-root"
                       tabindex="0"
                       type="button"
@@ -6106,111 +5701,19 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                           d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
                         />
                         <title>
-                          Not sorted by CD
+                          Not sorted by Difference Size
                         </title>
                       </svg>
-                      CD
+                      Difference Size
                     </button>
                   </span>
                 </div>
                 <div
-                  class="cell effects-header"
+                  class="cell trials-header"
                   role="columnheader"
                 >
                   <span
-                    class="MuiBox-root css-1tkq7a4"
-                    data-mui-internal-clone-element="true"
-                  >
-                    <button
-                      aria-label="CLES (%) (Click to sort by this column)"
-                      class="MuiButtonBase-root MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation css-7upxw3-MuiButtonBase-root-MuiButton-root"
-                      tabindex="0"
-                      type="button"
-                    >
-                      <svg
-                        class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-10d4m26-MuiSvgIcon-root"
-                        data-testid="SwapVertIcon"
-                        focusable="false"
-                        role="img"
-                        viewBox="0 0 24 24"
-                      >
-                        <path
-                          d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
-                        />
-                        <title>
-                          Not sorted by CLES (%)
-                        </title>
-                      </svg>
-                      CLES (%)
-                    </button>
-                  </span>
-                </div>
-                <div
-                  class="cell significance-header"
-                  role="columnheader"
-                >
-                  <div
-                    class="MuiButtonGroup-root MuiButtonGroup-contained MuiButtonGroup-horizontal MuiButtonGroup-disableElevation MuiButtonGroup-colorTableHeaderButton css-1fyroww-MuiButtonGroup-root"
-                    role="group"
-                  >
-                    <button
-                      aria-label="Sig (Click to sort by this column)"
-                      class="MuiButtonBase-root MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButtonGroup-firstButton css-17eldkb-MuiButtonBase-root-MuiButton-root"
-                      tabindex="0"
-                      type="button"
-                    >
-                      <svg
-                        class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
-                        data-testid="SwapVertIcon"
-                        focusable="false"
-                        role="img"
-                        viewBox="0 0 24 24"
-                      >
-                        <path
-                          d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
-                        />
-                        <title>
-                          Not sorted by Sig
-                        </title>
-                      </svg>
-                    </button>
-                    <button
-                      aria-haspopup="true"
-                      aria-label="Sig (Click to filter values)"
-                      class="MuiButtonBase-root MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation MuiButtonGroup-lastButton css-l81dbu-MuiButtonBase-root-MuiButton-root"
-                      data-mui-internal-clone-element="true"
-                      tabindex="0"
-                      type="button"
-                    >
-                      Sig
-                      <div
-                        aria-label="2 items selected"
-                        class="MuiBox-root css-18uhbjh"
-                      >
-                        (
-                        2
-                        )
-                      </div>
-                      <svg
-                        aria-hidden="true"
-                        class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-120he73-MuiSvgIcon-root"
-                        data-testid="KeyboardArrowDownIcon"
-                        focusable="false"
-                        viewBox="0 0 24 24"
-                      >
-                        <path
-                          d="M7.41 8.59 12 13.17l4.59-4.58L18 10l-6 6-6-6z"
-                        />
-                      </svg>
-                    </button>
-                  </div>
-                </div>
-                <div
-                  class="cell trials-header"
-                  role="columnheader"
-                >
-                  <span
-                    aria-label="The total number of tasks/jobs that ran for this metric."
+                    aria-label="The total number of tasks/jobs that ran for this metric."
                     class="MuiBox-root css-1tkq7a4"
                     data-mui-internal-clone-element="true"
                   >
@@ -6227,7 +5730,7 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                 />
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-185znds"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
                 role="row"
               >
                 <div
@@ -6280,7 +5783,7 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                   <span
                     style="display: inline-flex; align-items: center; gap: 4px;"
                   >
-                    0.963 %
+                    +1.14%
                   </span>
                 </div>
                 <div
@@ -6292,23 +5795,10 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                   />
                 </div>
                 <div
-                  class="delta cell"
-                  role="cell"
-                >
-                   
-                  -0.04
-                </div>
-                <div
-                  class="effects cell"
+                  class="difference-size cell"
                   role="cell"
                 >
-                  15.00% 
-                </div>
-                <div
-                  class="significance cell"
-                  role="cell"
-                >
-                  -
+                  Negligible
                 </div>
                 <div
                   class="total-runs cell"
@@ -6369,7 +5859,7 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_gc_"
+                    aria-controls="_r_fb_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -6391,7 +5881,7 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                 </div>
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-185znds"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
                 role="row"
               >
                 <div
@@ -6430,7 +5920,7 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                   <span
                     style="display: inline-flex; align-items: center; gap: 4px;"
                   >
-                    1.135 %
+                    +1.14%
                   </span>
                 </div>
                 <div
@@ -6455,36 +5945,10 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                   </div>
                 </div>
                 <div
-                  class="delta cell"
-                  role="cell"
-                >
-                   
-                  0.02
-                </div>
-                <div
-                  class="effects cell"
+                  class="difference-size cell"
                   role="cell"
                 >
-                  60.00% 
-                </div>
-                <div
-                  class="significance cell"
-                  role="cell"
-                >
-                  <svg
-                    aria-hidden="true"
-                    class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
-                    data-testid="KeyboardDoubleArrowUpIcon"
-                    focusable="false"
-                    viewBox="0 0 24 24"
-                  >
-                    <path
-                      d="M6 17.59 7.41 19 12 14.42 16.59 19 18 17.59l-6-6z"
-                    />
-                    <path
-                      d="m6 11 1.41 1.41L12 7.83l4.59 4.58L18 11l-6-6z"
-                    />
-                  </svg>
+                  Negligible
                 </div>
                 <div
                   class="total-runs cell"
@@ -6545,7 +6009,7 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_gf_"
+                    aria-controls="_r_fe_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -6567,7 +6031,7 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                 </div>
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-185znds"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
                 role="row"
               >
                 <div
@@ -6606,7 +6070,7 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                   <span
                     style="display: inline-flex; align-items: center; gap: 4px;"
                   >
-                    0.963 %
+                    +1.14%
                   </span>
                 </div>
                 <div
@@ -6618,36 +6082,10 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                   />
                 </div>
                 <div
-                  class="delta cell"
-                  role="cell"
-                >
-                   
-                  -0.05
-                </div>
-                <div
-                  class="effects cell"
+                  class="difference-size cell"
                   role="cell"
                 >
-                  50.00% 
-                </div>
-                <div
-                  class="significance cell"
-                  role="cell"
-                >
-                  <svg
-                    aria-hidden="true"
-                    class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
-                    data-testid="KeyboardDoubleArrowUpIcon"
-                    focusable="false"
-                    viewBox="0 0 24 24"
-                  >
-                    <path
-                      d="M6 17.59 7.41 19 12 14.42 16.59 19 18 17.59l-6-6z"
-                    />
-                    <path
-                      d="m6 11 1.41 1.41L12 7.83l4.59 4.58L18 11l-6-6z"
-                    />
-                  </svg>
+                  Negligible
                 </div>
                 <div
                   class="total-runs cell"
@@ -6708,7 +6146,7 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_gi_"
+                    aria-controls="_r_fh_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -6730,7 +6168,7 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                 </div>
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-185znds"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
                 role="row"
               >
                 <div
@@ -6769,7 +6207,7 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                   <span
                     style="display: inline-flex; align-items: center; gap: 4px;"
                   >
-                    1.135 %
+                    +1.14%
                   </span>
                 </div>
                 <div
@@ -6781,36 +6219,10 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                   />
                 </div>
                 <div
-                  class="delta cell"
-                  role="cell"
-                >
-                   
-                  0.12
-                </div>
-                <div
-                  class="effects cell"
+                  class="difference-size cell"
                   role="cell"
                 >
-                  25.00% 
-                </div>
-                <div
-                  class="significance cell"
-                  role="cell"
-                >
-                  <svg
-                    aria-hidden="true"
-                    class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
-                    data-testid="KeyboardDoubleArrowUpIcon"
-                    focusable="false"
-                    viewBox="0 0 24 24"
-                  >
-                    <path
-                      d="M6 17.59 7.41 19 12 14.42 16.59 19 18 17.59l-6-6z"
-                    />
-                    <path
-                      d="m6 11 1.41 1.41L12 7.83l4.59 4.58L18 11l-6-6z"
-                    />
-                  </svg>
+                  Small
                 </div>
                 <div
                   class="total-runs cell"
@@ -6871,7 +6283,7 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_gl_"
+                    aria-controls="_r_fk_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -6893,7 +6305,7 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                 </div>
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-185znds"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
                 role="row"
               >
                 <div
@@ -6932,7 +6344,7 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                   <span
                     style="display: inline-flex; align-items: center; gap: 4px;"
                   >
-                    0.98 %
+                    +0.98%
                   </span>
                 </div>
                 <div
@@ -6957,23 +6369,10 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                   </div>
                 </div>
                 <div
-                  class="delta cell"
+                  class="difference-size cell"
                   role="cell"
                 >
-                   
-                  0.01
-                </div>
-                <div
-                  class="effects cell"
-                  role="cell"
-                >
-                  45.00% 
-                </div>
-                <div
-                  class="significance cell"
-                  role="cell"
-                >
-                  -
+                  Negligible
                 </div>
                 <div
                   class="total-runs cell"
@@ -7034,7 +6433,7 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_go_"
+                    aria-controls="_r_fn_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -7461,7 +6860,7 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                           aria-invalid="false"
                           aria-label="Search by title"
                           class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd css-3v3un6-MuiInputBase-input-MuiOutlinedInput-input"
-                          id="_r_dd_"
+                          id="_r_cj_"
                           placeholder="Filter results"
                           type="search"
                           value=""
@@ -7549,6 +6948,41 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                     Retrigger test
                   </button>
                 </div>
+                <div
+                  class="MuiGrid-root MuiGrid-direction-xs-row MuiGrid-grid-xs-auto css-1spwhcy-MuiGrid-root"
+                >
+                  <label
+                    aria-label="Show the advanced statistics columns (Cliff’s Delta, CLES, Significance)"
+                    class="MuiFormControlLabel-root MuiFormControlLabel-labelPlacementEnd css-1bsjtco-MuiFormControlLabel-root"
+                    data-mui-internal-clone-element="true"
+                  >
+                    <span
+                      class="MuiButtonBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall PrivateSwitchBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall css-1nff2up-MuiButtonBase-root-MuiSwitchBase-root-MuiCheckbox-root"
+                    >
+                      <input
+                        class="PrivateSwitchBase-input css-12xagqm-MuiSwitchBase-root"
+                        data-indeterminate="false"
+                        type="checkbox"
+                      />
+                      <svg
+                        aria-hidden="true"
+                        class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
+                        data-testid="CheckBoxOutlineBlankIcon"
+                        focusable="false"
+                        viewBox="0 0 24 24"
+                      >
+                        <path
+                          d="M19 5v14H5V5h14m0-2H5c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h14c1.1 0 2-.9 2-2V5c0-1.1-.9-2-2-2z"
+                        />
+                      </svg>
+                    </span>
+                    <span
+                      class="MuiTypography-root MuiTypography-body1 MuiFormControlLabel-label css-n290n7-MuiTypography-root"
+                    >
+                      Advanced columns
+                    </span>
+                  </label>
+                </div>
               </div>
             </header>
             <div
@@ -7557,7 +6991,7 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
               role="table"
             >
               <div
-                class="f1itjsvw f1l733lh"
+                class="fws74y3 f1l733lh"
                 data-testid="table-header"
                 role="row"
               >
@@ -7621,12 +7055,12 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                   role="columnheader"
                 >
                   <span
-                    aria-label="Median Diff %: The percentage change in median from Base to New: ((New − Base) / Base) × 100."
+                    aria-label="Shows how much the middle result changed from Base to New. We line up all the runs from smallest to biggest and pick the middle one for each side, then show the change as a percent. A postive sign means New is higher; a negative sign means New is lower."
                     class="MuiBox-root css-1tkq7a4"
                     data-mui-internal-clone-element="true"
                   >
                     <button
-                      aria-label="MD (%) (Click to sort by this column)"
+                      aria-label="Δ Median % (Click to sort by this column)"
                       class="MuiButtonBase-root MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation css-7upxw3-MuiButtonBase-root-MuiButton-root"
                       tabindex="0"
                       type="button"
@@ -7642,10 +7076,10 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                           d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
                         />
                         <title>
-                          Not sorted by MD (%)
+                          Not sorted by Δ Median %
                         </title>
                       </svg>
-                      MD (%)
+                      Δ Median %
                     </button>
                   </span>
                 </div>
@@ -7684,47 +7118,16 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                   </button>
                 </div>
                 <div
-                  class="cell delta-header"
-                  role="columnheader"
-                >
-                  <span
-                    class="MuiBox-root css-1tkq7a4"
-                    data-mui-internal-clone-element="true"
-                  >
-                    <button
-                      aria-label="CD (Click to sort by this column)"
-                      class="MuiButtonBase-root MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation css-7upxw3-MuiButtonBase-root-MuiButton-root"
-                      tabindex="0"
-                      type="button"
-                    >
-                      <svg
-                        class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-10d4m26-MuiSvgIcon-root"
-                        data-testid="SwapVertIcon"
-                        focusable="false"
-                        role="img"
-                        viewBox="0 0 24 24"
-                      >
-                        <path
-                          d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
-                        />
-                        <title>
-                          Not sorted by CD
-                        </title>
-                      </svg>
-                      CD
-                    </button>
-                  </span>
-                </div>
-                <div
-                  class="cell effects-header"
+                  class="cell difference-size-header"
                   role="columnheader"
                 >
                   <span
+                    aria-label="Shows how big the difference between Base and New is, in plain words: negligible (barely any), small, medium, or large. It comes from how much the Base and New results overlap — the less they overlap, the bigger the difference."
                     class="MuiBox-root css-1tkq7a4"
                     data-mui-internal-clone-element="true"
                   >
                     <button
-                      aria-label="CLES (%) (Click to sort by this column)"
+                      aria-label="Difference Size (Click to sort by this column)"
                       class="MuiButtonBase-root MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation css-7upxw3-MuiButtonBase-root-MuiButton-root"
                       tabindex="0"
                       type="button"
@@ -7740,73 +7143,13 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                           d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
                         />
                         <title>
-                          Not sorted by CLES (%)
+                          Not sorted by Difference Size
                         </title>
                       </svg>
-                      CLES (%)
+                      Difference Size
                     </button>
                   </span>
                 </div>
-                <div
-                  class="cell significance-header"
-                  role="columnheader"
-                >
-                  <div
-                    class="MuiButtonGroup-root MuiButtonGroup-contained MuiButtonGroup-horizontal MuiButtonGroup-disableElevation MuiButtonGroup-colorTableHeaderButton css-1fyroww-MuiButtonGroup-root"
-                    role="group"
-                  >
-                    <button
-                      aria-label="Sig (Click to sort by this column)"
-                      class="MuiButtonBase-root MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButtonGroup-firstButton css-17eldkb-MuiButtonBase-root-MuiButton-root"
-                      tabindex="0"
-                      type="button"
-                    >
-                      <svg
-                        class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
-                        data-testid="SwapVertIcon"
-                        focusable="false"
-                        role="img"
-                        viewBox="0 0 24 24"
-                      >
-                        <path
-                          d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
-                        />
-                        <title>
-                          Not sorted by Sig
-                        </title>
-                      </svg>
-                    </button>
-                    <button
-                      aria-haspopup="true"
-                      aria-label="Sig (Click to filter values)"
-                      class="MuiButtonBase-root MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation MuiButtonGroup-lastButton css-l81dbu-MuiButtonBase-root-MuiButton-root"
-                      data-mui-internal-clone-element="true"
-                      tabindex="0"
-                      type="button"
-                    >
-                      Sig
-                      <div
-                        aria-label="2 items selected"
-                        class="MuiBox-root css-18uhbjh"
-                      >
-                        (
-                        2
-                        )
-                      </div>
-                      <svg
-                        aria-hidden="true"
-                        class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-120he73-MuiSvgIcon-root"
-                        data-testid="KeyboardArrowDownIcon"
-                        focusable="false"
-                        viewBox="0 0 24 24"
-                      >
-                        <path
-                          d="M7.41 8.59 12 13.17l4.59-4.58L18 10l-6 6-6-6z"
-                        />
-                      </svg>
-                    </button>
-                  </div>
-                </div>
                 <div
                   class="cell trials-header"
                   role="columnheader"
@@ -7829,7 +7172,7 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                 />
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-185znds"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
                 role="row"
               >
                 <div
@@ -7880,7 +7223,7 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                   <span
                     style="display: inline-flex; align-items: center; gap: 4px;"
                   >
-                    0 %
+                    +1.14%
                   </span>
                 </div>
                 <div
@@ -7892,20 +7235,7 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                   />
                 </div>
                 <div
-                  class="delta cell"
-                  role="cell"
-                >
-                   
-                  -
-                </div>
-                <div
-                  class="effects cell"
-                  role="cell"
-                >
-                  0.00% 
-                </div>
-                <div
-                  class="significance cell"
+                  class="difference-size cell"
                   role="cell"
                 >
                   -
@@ -7969,7 +7299,7 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_dj_"
+                    aria-controls="_r_cq_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -7991,7 +7321,7 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                 </div>
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-185znds"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
                 role="row"
               >
                 <div
@@ -8028,7 +7358,7 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                   <span
                     style="display: inline-flex; align-items: center; gap: 4px;"
                   >
-                    0 %
+                    +1.14%
                   </span>
                 </div>
                 <div
@@ -8040,20 +7370,7 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                   />
                 </div>
                 <div
-                  class="delta cell"
-                  role="cell"
-                >
-                   
-                  -
-                </div>
-                <div
-                  class="effects cell"
-                  role="cell"
-                >
-                  0.00% 
-                </div>
-                <div
-                  class="significance cell"
+                  class="difference-size cell"
                   role="cell"
                 >
                   -
@@ -8117,7 +7434,7 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_dm_"
+                    aria-controls="_r_ct_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -8139,7 +7456,7 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                 </div>
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-185znds"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
                 role="row"
               >
                 <div
@@ -8176,7 +7493,7 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                   <span
                     style="display: inline-flex; align-items: center; gap: 4px;"
                   >
-                    0 %
+                    +1.14%
                   </span>
                 </div>
                 <div
@@ -8188,20 +7505,7 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                   />
                 </div>
                 <div
-                  class="delta cell"
-                  role="cell"
-                >
-                   
-                  -
-                </div>
-                <div
-                  class="effects cell"
-                  role="cell"
-                >
-                  0.00% 
-                </div>
-                <div
-                  class="significance cell"
+                  class="difference-size cell"
                   role="cell"
                 >
                   -
@@ -8265,7 +7569,7 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_dp_"
+                    aria-controls="_r_d0_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -8287,7 +7591,7 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                 </div>
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-185znds"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
                 role="row"
               >
                 <div
@@ -8324,7 +7628,7 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                   <span
                     style="display: inline-flex; align-items: center; gap: 4px;"
                   >
-                    0 %
+                    +1.14%
                   </span>
                 </div>
                 <div
@@ -8336,20 +7640,7 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                   />
                 </div>
                 <div
-                  class="delta cell"
-                  role="cell"
-                >
-                   
-                  -
-                </div>
-                <div
-                  class="effects cell"
-                  role="cell"
-                >
-                  0.00% 
-                </div>
-                <div
-                  class="significance cell"
+                  class="difference-size cell"
                   role="cell"
                 >
                   -
@@ -8413,7 +7704,7 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_ds_"
+                    aria-controls="_r_d3_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -8435,7 +7726,7 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                 </div>
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-185znds"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
                 role="row"
               >
                 <div
@@ -8472,7 +7763,7 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                   <span
                     style="display: inline-flex; align-items: center; gap: 4px;"
                   >
-                    0 %
+                    +0.98%
                   </span>
                 </div>
                 <div
@@ -8484,20 +7775,7 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                   />
                 </div>
                 <div
-                  class="delta cell"
-                  role="cell"
-                >
-                   
-                  -
-                </div>
-                <div
-                  class="effects cell"
-                  role="cell"
-                >
-                  0.00% 
-                </div>
-                <div
-                  class="significance cell"
+                  class="difference-size cell"
                   role="cell"
                 >
                   -
@@ -8561,7 +7839,7 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_dv_"
+                    aria-controls="_r_d6_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
diff --git a/src/__tests__/Search/__snapshots__/CompareOverTime.test.tsx.snap b/src/__tests__/Search/__snapshots__/CompareOverTime.test.tsx.snap
index b373e443c..89536dd15 100644
--- a/src/__tests__/Search/__snapshots__/CompareOverTime.test.tsx.snap
+++ b/src/__tests__/Search/__snapshots__/CompareOverTime.test.tsx.snap
@@ -742,7 +742,7 @@ exports[`Compare Over Time selects and displays new time range when clicked 1`]
 <ul
   aria-labelledby="select-timerange-label"
   class="MuiList-root MuiList-padding MuiMenu-list css-1toxriw-MuiList-root-MuiMenu-list"
-  id="_r_5q_"
+  id="_r_5m_"
   role="listbox"
   tabindex="-1"
 >
@@ -1221,7 +1221,7 @@ exports[`Compare Over Time should have an edit mode in Results View: After click
                     autocapitalize="none"
                     autocomplete="off"
                     class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-16cokj7-MuiInputBase-input-MuiOutlinedInput-input"
-                    id="_r_d1_"
+                    id="_r_cl_"
                     placeholder="Search by revision ID or author email"
                     role="combobox"
                     spellcheck="false"
@@ -2053,7 +2053,7 @@ exports[`Compare Over Time should remove the checked revision once X button is c
                     autocapitalize="none"
                     autocomplete="off"
                     class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-9wexq8-MuiInputBase-input-MuiOutlinedInput-input"
-                    id="_r_7q_"
+                    id="_r_7m_"
                     placeholder="Search by revision ID or author email"
                     role="combobox"
                     spellcheck="false"
@@ -2993,7 +2993,7 @@ exports[`Compare Over Time should update base repo, revisions and time-range aft
                     autocapitalize="none"
                     autocomplete="off"
                     class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-16cokj7-MuiInputBase-input-MuiOutlinedInput-input"
-                    id="_r_ea_"
+                    id="_r_dq_"
                     placeholder="Search by revision ID or author email"
                     role="combobox"
                     spellcheck="false"
diff --git a/src/__tests__/Search/__snapshots__/CompareWithBase.test.tsx.snap b/src/__tests__/Search/__snapshots__/CompareWithBase.test.tsx.snap
index 088445814..c7d3e44df 100644
--- a/src/__tests__/Search/__snapshots__/CompareWithBase.test.tsx.snap
+++ b/src/__tests__/Search/__snapshots__/CompareWithBase.test.tsx.snap
@@ -742,7 +742,7 @@ exports[`Compare With Base selects and displays new framework when clicked 1`] =
 <ul
   aria-labelledby="select-framework-label"
   class="MuiList-root MuiList-padding MuiMenu-list css-1toxriw-MuiList-root-MuiMenu-list"
-  id="_r_2l_"
+  id="_r_2h_"
   role="listbox"
   tabindex="-1"
 >
@@ -1028,7 +1028,7 @@ exports[`Compare With Base should have an edit mode in Results View: After click
                     autocapitalize="none"
                     autocomplete="off"
                     class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-16cokj7-MuiInputBase-input-MuiOutlinedInput-input"
-                    id="_r_4c_"
+                    id="_r_48_"
                     placeholder="Search by revision ID or author email"
                     role="combobox"
                     spellcheck="false"
@@ -1375,7 +1375,7 @@ exports[`Compare With Base should have an edit mode in Results View: After click
                     autocapitalize="none"
                     autocomplete="off"
                     class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-16cokj7-MuiInputBase-input-MuiOutlinedInput-input"
-                    id="_r_4l_"
+                    id="_r_4h_"
                     placeholder="Search by revision ID or author email"
                     role="combobox"
                     spellcheck="false"
@@ -1626,7 +1626,7 @@ exports[`Compare With Base should have an edit mode in Results View: After click
                     autocapitalize="none"
                     autocomplete="off"
                     class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-16cokj7-MuiInputBase-input-MuiOutlinedInput-input"
-                    id="_r_4c_"
+                    id="_r_48_"
                     placeholder="Search by revision ID or author email"
                     role="combobox"
                     spellcheck="false"
@@ -1973,7 +1973,7 @@ exports[`Compare With Base should have an edit mode in Results View: After click
                     autocapitalize="none"
                     autocomplete="off"
                     class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-16cokj7-MuiInputBase-input-MuiOutlinedInput-input"
-                    id="_r_4l_"
+                    id="_r_4h_"
                     placeholder="Search by revision ID or author email"
                     role="combobox"
                     spellcheck="false"
@@ -2388,7 +2388,7 @@ exports[`Compare With Base should have an edit mode in Results View: Initial sta
                     autocapitalize="none"
                     autocomplete="off"
                     class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-16cokj7-MuiInputBase-input-MuiOutlinedInput-input"
-                    id="_r_4c_"
+                    id="_r_48_"
                     placeholder="Search by revision ID or author email"
                     role="combobox"
                     spellcheck="false"
@@ -2735,7 +2735,7 @@ exports[`Compare With Base should have an edit mode in Results View: Initial sta
                     autocapitalize="none"
                     autocomplete="off"
                     class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-16cokj7-MuiInputBase-input-MuiOutlinedInput-input"
-                    id="_r_4l_"
+                    id="_r_4h_"
                     placeholder="Search by revision ID or author email"
                     role="combobox"
                     spellcheck="false"
@@ -3154,7 +3154,7 @@ exports[`Compare With Base should have an edit mode in Results View: after remov
                     autocapitalize="none"
                     autocomplete="off"
                     class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-16cokj7-MuiInputBase-input-MuiOutlinedInput-input"
-                    id="_r_4c_"
+                    id="_r_48_"
                     placeholder="Search by revision ID or author email"
                     role="combobox"
                     spellcheck="false"
@@ -3341,7 +3341,7 @@ exports[`Compare With Base should have an edit mode in Results View: after remov
                     autocapitalize="none"
                     autocomplete="off"
                     class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-16cokj7-MuiInputBase-input-MuiOutlinedInput-input"
-                    id="_r_4l_"
+                    id="_r_4h_"
                     placeholder="Search by revision ID or author email"
                     role="combobox"
                     spellcheck="false"
@@ -3792,7 +3792,7 @@ exports[`Compare With Base should have an edit mode in Results View: after remov
                     autocapitalize="none"
                     autocomplete="off"
                     class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-16cokj7-MuiInputBase-input-MuiOutlinedInput-input"
-                    id="_r_4c_"
+                    id="_r_48_"
                     placeholder="Search by revision ID or author email"
                     role="combobox"
                     spellcheck="false"
@@ -4139,7 +4139,7 @@ exports[`Compare With Base should have an edit mode in Results View: after remov
                     autocapitalize="none"
                     autocomplete="off"
                     class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-16cokj7-MuiInputBase-input-MuiOutlinedInput-input"
-                    id="_r_4l_"
+                    id="_r_4h_"
                     placeholder="Search by revision ID or author email"
                     role="combobox"
                     spellcheck="false"
@@ -4585,7 +4585,7 @@ exports[`Compare With Base should remove the checked revision once X button is c
                                   autocapitalize="none"
                                   autocomplete="off"
                                   class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-9wexq8-MuiInputBase-input-MuiOutlinedInput-input"
-                                  id="_r_37_"
+                                  id="_r_33_"
                                   placeholder="Search by revision ID or author email"
                                   role="combobox"
                                   spellcheck="false"
@@ -4772,7 +4772,7 @@ exports[`Compare With Base should remove the checked revision once X button is c
                                   autocapitalize="none"
                                   autocomplete="off"
                                   class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-9wexq8-MuiInputBase-input-MuiOutlinedInput-input"
-                                  id="_r_3c_"
+                                  id="_r_38_"
                                   placeholder="Search by revision ID or author email"
                                   role="combobox"
                                   spellcheck="false"
@@ -5238,7 +5238,7 @@ exports[`Compare With Base should remove the checked revision once X button is c
                                   autocapitalize="none"
                                   autocomplete="off"
                                   class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-9wexq8-MuiInputBase-input-MuiOutlinedInput-input"
-                                  id="_r_3o_"
+                                  id="_r_3k_"
                                   placeholder="Search by revision ID or author email"
                                   role="combobox"
                                   spellcheck="false"
@@ -5395,7 +5395,7 @@ exports[`Compare With Base should remove the checked revision once X button is c
 exports[`Compare With Base updates the framework and url when a new one is selected: after awsy is selected 1`] = `
 <ul
   class="MuiList-root MuiList-padding MuiMenu-list css-1toxriw-MuiList-root-MuiMenu-list"
-  id="_r_6n_"
+  id="_r_6f_"
   role="listbox"
   tabindex="-1"
 >
diff --git a/src/__tests__/utils/test-utils.tsx b/src/__tests__/utils/test-utils.tsx
index c463034da..58c34c70a 100644
--- a/src/__tests__/utils/test-utils.tsx
+++ b/src/__tests__/utils/test-utils.tsx
@@ -14,8 +14,17 @@ import { VirtuosoMockContext } from 'react-virtuoso';
 
 import { store } from './setupTests';
 import SnackbarCloseButton from '../../components/Shared/SnackbarCloseButton';
+import { updateShowAdvancedColumns } from '../../reducers/ColumnPrefsSlice';
 import getProtocolTheme from '../../theme/protocolTheme';
 
+// Turn on the advanced results columns (CD, CLES, Sig) for tests that exercise
+// them. They're hidden by default (simplified view), so call this before
+// rendering in tests that assert on those columns. The store is recreated in
+// each test's beforeEach, so this only affects the current test.
+export function enableAdvancedColumns() {
+  store.dispatch(updateShowAdvancedColumns(true));
+}
+
 type ThemeConfig = Partial<Theme> | null;
 export function render(ui: React.ReactElement, themeConfig?: ThemeConfig) {
   function Wrapper({ children }: { children: React.ReactNode }) {
diff --git a/src/components/CompareResults/SubtestsResults/SubtestsResultsTable.tsx b/src/components/CompareResults/SubtestsResults/SubtestsResultsTable.tsx
index 67db241ea..230b7a615 100644
--- a/src/components/CompareResults/SubtestsResults/SubtestsResultsTable.tsx
+++ b/src/components/CompareResults/SubtestsResults/SubtestsResultsTable.tsx
@@ -85,7 +85,11 @@ function SubtestsResultsTable({
   );
   const columnsConfiguration = useMemo(
     () =>
-      getColumnsConfiguration(true, testVersion ?? STUDENT_T, showAdvancedColumns),
+      getColumnsConfiguration(
+        true,
+        testVersion ?? STUDENT_T,
+        showAdvancedColumns,
+      ),
     [testVersion, showAdvancedColumns],
   );
   // This is our custom hook that manages table filters

From e2c769d84cfad67bd890fdb06f46dee146c0ddb1 Mon Sep 17 00:00:00 2001
From: Carla Severe <csevere@mozilla.com>
Date: Thu, 23 Jul 2026 18:32:55 -0700
Subject: [PATCH 3/6] add interpret results panel for simple users

---
 src/__tests__/App.test.tsx                    |  14 +-
 .../CompareResults/ResultsView.test.tsx       |  20 ++
 .../OverTimeResultsView.test.tsx.snap         |  42 ++-
 .../__snapshots__/ResultsTable.test.tsx.snap  | 340 +++++++++++++++++-
 .../__snapshots__/ResultsView.test.tsx.snap   |  46 ++-
 .../__snapshots__/SearchInput.test.tsx.snap   |   2 +-
 .../CompareOverTime.test.tsx.snap             |   8 +-
 .../CompareWithBase.test.tsx.snap             |  30 +-
 .../CompareResults/HowToReadResults.tsx       |  65 ++++
 .../CompareResults/ResultsControls.tsx        |  23 +-
 src/components/CompareResults/ResultsMain.tsx |   2 +
 src/reducers/ColumnPrefsSlice.ts              |  22 +-
 12 files changed, 555 insertions(+), 59 deletions(-)
 create mode 100644 src/components/CompareResults/HowToReadResults.tsx

diff --git a/src/__tests__/App.test.tsx b/src/__tests__/App.test.tsx
index 1a2bc9587..3a71d0cab 100644
--- a/src/__tests__/App.test.tsx
+++ b/src/__tests__/App.test.tsx
@@ -3,7 +3,7 @@ import userEvent from '@testing-library/user-event';
 
 import App, { router } from '../components/App';
 import getTestData from './utils/fixtures';
-import { act, render, screen } from './utils/test-utils';
+import { act, render, screen, within } from './utils/test-utils';
 
 describe('App', () => {
   beforeEach(() => {
@@ -398,10 +398,14 @@ describe('App', () => {
 
       // Verify that Mann-Whitney-U specific columns are rendered in the
       // default (simplified) view — "Difference Size" and "Δ Median %" are
-      // unique to the Mann-Whitney strategy, so their presence indicates the
-      // testVersion defaulted to mann-whitney-u.
-      expect(screen.getByText('Difference Size')).toBeInTheDocument();
-      expect(screen.getByText('Δ Median %')).toBeInTheDocument();
+      // unique to the Mann-Whitney strategy, so their presence in the table
+      // header indicates the testVersion defaulted to mann-whitney-u. Scope to
+      // the header since the "How to read the results" panel also names them.
+      const tableHeader = screen.getByTestId('table-header');
+      expect(
+        within(tableHeader).getByText('Difference Size'),
+      ).toBeInTheDocument();
+      expect(within(tableHeader).getByText('Δ Median %')).toBeInTheDocument();
 
       // Verify the Stats Test Version dropdown shows Mann-Whitney-U as selected
       const testVersionDropdown = screen.getByRole('combobox', {
diff --git a/src/__tests__/CompareResults/ResultsView.test.tsx b/src/__tests__/CompareResults/ResultsView.test.tsx
index 9d6bb7f31..dd494e8cf 100644
--- a/src/__tests__/CompareResults/ResultsView.test.tsx
+++ b/src/__tests__/CompareResults/ResultsView.test.tsx
@@ -566,4 +566,24 @@ describe('Results View', () => {
       expect(screen.queryAllByTestId(/ExpandLessIcon/)).toHaveLength(0);
     });
   });
+
+  it('shows the "How to read the results" panel by default and lets the user dismiss it', async () => {
+    renderWithRoute(<ResultsView title={Strings.metaData.pageTitle.results} />);
+    await screen.findByText('a11yr');
+
+    // Shown by default.
+    const panel = screen.getByTestId('how-to-read-results');
+    expect(panel).toBeInTheDocument();
+
+    // Dismiss via the panel's close button.
+    const user = userEvent.setup({ advanceTimers: jest.advanceTimersByTime });
+    await user.click(screen.getByRole('button', { name: /close/i }));
+    expect(screen.queryByTestId('how-to-read-results')).not.toBeInTheDocument();
+
+    // The "How to read the results" checkbox brings it back.
+    await user.click(
+      screen.getByRole('checkbox', { name: /How to read the results/i }),
+    );
+    expect(screen.getByTestId('how-to-read-results')).toBeInTheDocument();
+  });
 });
diff --git a/src/__tests__/CompareResults/__snapshots__/OverTimeResultsView.test.tsx.snap b/src/__tests__/CompareResults/__snapshots__/OverTimeResultsView.test.tsx.snap
index 0d1a7f550..cbda59375 100644
--- a/src/__tests__/CompareResults/__snapshots__/OverTimeResultsView.test.tsx.snap
+++ b/src/__tests__/CompareResults/__snapshots__/OverTimeResultsView.test.tsx.snap
@@ -52,7 +52,7 @@ exports[`Results View The table should match snapshot and other elements should
                 aria-invalid="false"
                 aria-label="Search by title, platform, revision or options"
                 class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd css-3v3un6-MuiInputBase-input-MuiOutlinedInput-input"
-                id="_r_a_"
+                id="_r_b_"
                 placeholder="Filter results"
                 type="search"
                 value=""
@@ -346,6 +346,38 @@ exports[`Results View The table should match snapshot and other elements should
               Advanced columns
             </span>
           </label>
+          <label
+            aria-label="Show the "How to read the results" guide above the table"
+            class="MuiFormControlLabel-root MuiFormControlLabel-labelPlacementEnd css-1bsjtco-MuiFormControlLabel-root"
+            data-mui-internal-clone-element="true"
+          >
+            <span
+              class="MuiButtonBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall PrivateSwitchBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall Mui-checked MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall css-1nff2up-MuiButtonBase-root-MuiSwitchBase-root-MuiCheckbox-root"
+            >
+              <input
+                checked=""
+                class="PrivateSwitchBase-input css-12xagqm-MuiSwitchBase-root"
+                data-indeterminate="false"
+                type="checkbox"
+              />
+              <svg
+                aria-hidden="true"
+                class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
+                data-testid="CheckBoxIcon"
+                focusable="false"
+                viewBox="0 0 24 24"
+              >
+                <path
+                  d="M19 3H5c-1.11 0-2 .9-2 2v14c0 1.1.89 2 2 2h14c1.11 0 2-.9 2-2V5c0-1.1-.89-2-2-2zm-9 14l-5-5 1.41-1.41L10 14.17l7.59-7.59L19 8l-9 9z"
+                />
+              </svg>
+            </span>
+            <span
+              class="MuiTypography-root MuiTypography-body1 MuiFormControlLabel-label css-n290n7-MuiTypography-root"
+            >
+              How to read the results
+            </span>
+          </label>
           <label
             aria-label="Expand all rows"
             class="MuiFormControlLabel-root MuiFormControlLabel-labelPlacementEnd css-1bsjtco-MuiFormControlLabel-root"
@@ -849,7 +881,7 @@ exports[`Results View The table should match snapshot and other elements should
                     data-testid="expand-revision-button"
                   >
                     <button
-                      aria-controls="_r_u_"
+                      aria-controls="_r_10_"
                       aria-expanded="false"
                       class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                       tabindex="0"
@@ -1036,7 +1068,7 @@ exports[`Results View The table should match snapshot and other elements should
                     data-testid="expand-revision-button"
                   >
                     <button
-                      aria-controls="_r_15_"
+                      aria-controls="_r_17_"
                       aria-expanded="false"
                       class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                       tabindex="0"
@@ -1223,7 +1255,7 @@ exports[`Results View The table should match snapshot and other elements should
                     data-testid="expand-revision-button"
                   >
                     <button
-                      aria-controls="_r_1c_"
+                      aria-controls="_r_1e_"
                       aria-expanded="false"
                       class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                       tabindex="0"
@@ -1410,7 +1442,7 @@ exports[`Results View The table should match snapshot and other elements should
                     data-testid="expand-revision-button"
                   >
                     <button
-                      aria-controls="_r_1j_"
+                      aria-controls="_r_1l_"
                       aria-expanded="false"
                       class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                       tabindex="0"
diff --git a/src/__tests__/CompareResults/__snapshots__/ResultsTable.test.tsx.snap b/src/__tests__/CompareResults/__snapshots__/ResultsTable.test.tsx.snap
index 51cd17bbb..a95a77860 100644
--- a/src/__tests__/CompareResults/__snapshots__/ResultsTable.test.tsx.snap
+++ b/src/__tests__/CompareResults/__snapshots__/ResultsTable.test.tsx.snap
@@ -974,6 +974,128 @@ exports[`Results Table Should match snapshot 1`] = `
                 </div>
               </div>
             </header>
+            <div
+              class="MuiPaper-root MuiPaper-elevation MuiPaper-rounded MuiPaper-elevation0 MuiAlert-root MuiAlert-colorInfo MuiAlert-standardInfo MuiAlert-standard css-6r948r-MuiPaper-root-MuiAlert-root"
+              data-testid="how-to-read-results"
+              role="alert"
+              style="--Paper-shadow: none;"
+            >
+              <div
+                class="MuiAlert-icon css-vab54s-MuiAlert-icon"
+              >
+                <svg
+                  aria-hidden="true"
+                  class="MuiSvgIcon-root MuiSvgIcon-fontSizeInherit css-6gorna-MuiSvgIcon-root"
+                  data-testid="InfoOutlinedIcon"
+                  focusable="false"
+                  viewBox="0 0 24 24"
+                >
+                  <path
+                    d="M11,9H13V7H11M12,20C7.59,20 4,16.41 4,12C4,7.59 7.59,4 12,4C16.41,4 20,7.59 20, 12C20,16.41 16.41,20 12,20M12,2A10,10 0 0,0 2,12A10,10 0 0,0 12,22A10,10 0 0,0 22,12A10, 10 0 0,0 12,2M11,17H13V11H11V17Z"
+                  />
+                </svg>
+              </div>
+              <div
+                class="MuiAlert-message css-zioonp-MuiAlert-message"
+              >
+                <div
+                  class="MuiTypography-root MuiTypography-body1 MuiTypography-gutterBottom MuiAlertTitle-root css-4xzt87-MuiTypography-root-MuiAlertTitle-root"
+                >
+                  How to read the results
+                </div>
+                <ul
+                  class="MuiBox-root css-n1ol3p"
+                >
+                  <li>
+                    Each row is one 
+                    <strong>
+                      platform
+                    </strong>
+                    . 
+                    <strong>
+                      Base
+                    </strong>
+                     is the old build; 
+                    <strong>
+                      New
+                    </strong>
+                     is your change.
+                  </li>
+                  <li>
+                    <strong>
+                      Base
+                    </strong>
+                     and 
+                    <strong>
+                      New
+                    </strong>
+                     show the average result for each build, in the test's unit.
+                  </li>
+                  <li>
+                    <strong>
+                      Δ Median %
+                    </strong>
+                     shows how much the middle result moved from Base to New. A plus sign means New is higher; a minus sign means New is lower.
+                  </li>
+                  <li>
+                    <strong>
+                      Status
+                    </strong>
+                     says whether the change is an
+                     
+                    <strong>
+                      Improvement
+                    </strong>
+                    , a 
+                    <strong>
+                      Regression
+                    </strong>
+                    , or
+                     
+                    <strong>
+                      No change
+                    </strong>
+                    .
+                  </li>
+                  <li>
+                    <strong>
+                      Difference Size
+                    </strong>
+                     says how big the difference is: negligible, small, medium, or large.
+                  </li>
+                  <li>
+                    Tick 
+                    <strong>
+                      Advanced columns
+                    </strong>
+                     to add the expert stats (Cliff's Delta, CLES, Significance).
+                  </li>
+                </ul>
+              </div>
+              <div
+                class="MuiAlert-action css-rgppqo-MuiAlert-action"
+              >
+                <button
+                  aria-label="Close"
+                  class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorInherit MuiIconButton-sizeSmall css-ak37b0-MuiButtonBase-root-MuiIconButton-root"
+                  tabindex="0"
+                  title="Close"
+                  type="button"
+                >
+                  <svg
+                    aria-hidden="true"
+                    class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
+                    data-testid="CloseIcon"
+                    focusable="false"
+                    viewBox="0 0 24 24"
+                  >
+                    <path
+                      d="M19 6.41L17.59 5 12 10.59 6.41 5 5 6.41 10.59 12 5 17.59 6.41 19 12 13.41 17.59 19 19 17.59 13.41 12z"
+                    />
+                  </svg>
+                </button>
+              </div>
+            </div>
             <div
               class="MuiBox-root css-hshm0p"
               data-testid="results-table"
@@ -1025,7 +1147,7 @@ exports[`Results Table Should match snapshot 1`] = `
                             aria-invalid="false"
                             aria-label="Search by title, platform, revision or options"
                             class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd css-3v3un6-MuiInputBase-input-MuiOutlinedInput-input"
-                            id="_r_k_"
+                            id="_r_l_"
                             placeholder="Filter results"
                             type="search"
                             value=""
@@ -1319,6 +1441,38 @@ exports[`Results Table Should match snapshot 1`] = `
                           Advanced columns
                         </span>
                       </label>
+                      <label
+                        aria-label="Show the "How to read the results" guide above the table"
+                        class="MuiFormControlLabel-root MuiFormControlLabel-labelPlacementEnd css-1bsjtco-MuiFormControlLabel-root"
+                        data-mui-internal-clone-element="true"
+                      >
+                        <span
+                          class="MuiButtonBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall PrivateSwitchBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall Mui-checked MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall css-1nff2up-MuiButtonBase-root-MuiSwitchBase-root-MuiCheckbox-root"
+                        >
+                          <input
+                            checked=""
+                            class="PrivateSwitchBase-input css-12xagqm-MuiSwitchBase-root"
+                            data-indeterminate="false"
+                            type="checkbox"
+                          />
+                          <svg
+                            aria-hidden="true"
+                            class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
+                            data-testid="CheckBoxIcon"
+                            focusable="false"
+                            viewBox="0 0 24 24"
+                          >
+                            <path
+                              d="M19 3H5c-1.11 0-2 .9-2 2v14c0 1.1.89 2 2 2h14c1.11 0 2-.9 2-2V5c0-1.1-.89-2-2-2zm-9 14l-5-5 1.41-1.41L10 14.17l7.59-7.59L19 8l-9 9z"
+                            />
+                          </svg>
+                        </span>
+                        <span
+                          class="MuiTypography-root MuiTypography-body1 MuiFormControlLabel-label css-n290n7-MuiTypography-root"
+                        >
+                          How to read the results
+                        </span>
+                      </label>
                       <label
                         aria-label="Expand all rows"
                         class="MuiFormControlLabel-root MuiFormControlLabel-labelPlacementEnd css-1bsjtco-MuiFormControlLabel-root"
@@ -1822,7 +1976,7 @@ exports[`Results Table Should match snapshot 1`] = `
                                 data-testid="expand-revision-button"
                               >
                                 <button
-                                  aria-controls="_r_18_"
+                                  aria-controls="_r_1a_"
                                   aria-expanded="false"
                                   class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                                   tabindex="0"
@@ -2009,7 +2163,7 @@ exports[`Results Table Should match snapshot 1`] = `
                                 data-testid="expand-revision-button"
                               >
                                 <button
-                                  aria-controls="_r_1f_"
+                                  aria-controls="_r_1h_"
                                   aria-expanded="false"
                                   class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                                   tabindex="0"
@@ -2196,7 +2350,7 @@ exports[`Results Table Should match snapshot 1`] = `
                                 data-testid="expand-revision-button"
                               >
                                 <button
-                                  aria-controls="_r_1m_"
+                                  aria-controls="_r_1o_"
                                   aria-expanded="false"
                                   class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                                   tabindex="0"
@@ -2470,7 +2624,7 @@ exports[`Results Table Should match snapshot 1`] = `
                                 data-testid="expand-revision-button"
                               >
                                 <button
-                                  aria-controls="_r_1u_"
+                                  aria-controls="_r_20_"
                                   aria-expanded="false"
                                   class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                                   tabindex="0"
@@ -3120,7 +3274,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                                 autocapitalize="none"
                                 autocomplete="off"
                                 class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-16cokj7-MuiInputBase-input-MuiOutlinedInput-input"
-                                id="_r_qb_"
+                                id="_r_qv_"
                                 placeholder="Search by revision ID or author email"
                                 role="combobox"
                                 spellcheck="false"
@@ -3447,7 +3601,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                                 autocapitalize="none"
                                 autocomplete="off"
                                 class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-16cokj7-MuiInputBase-input-MuiOutlinedInput-input"
-                                id="_r_qj_"
+                                id="_r_r7_"
                                 placeholder="Search by revision ID or author email"
                                 role="combobox"
                                 spellcheck="false"
@@ -3753,6 +3907,128 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                 </div>
               </div>
             </header>
+            <div
+              class="MuiPaper-root MuiPaper-elevation MuiPaper-rounded MuiPaper-elevation0 MuiAlert-root MuiAlert-colorInfo MuiAlert-standardInfo MuiAlert-standard css-6r948r-MuiPaper-root-MuiAlert-root"
+              data-testid="how-to-read-results"
+              role="alert"
+              style="--Paper-shadow: none;"
+            >
+              <div
+                class="MuiAlert-icon css-vab54s-MuiAlert-icon"
+              >
+                <svg
+                  aria-hidden="true"
+                  class="MuiSvgIcon-root MuiSvgIcon-fontSizeInherit css-6gorna-MuiSvgIcon-root"
+                  data-testid="InfoOutlinedIcon"
+                  focusable="false"
+                  viewBox="0 0 24 24"
+                >
+                  <path
+                    d="M11,9H13V7H11M12,20C7.59,20 4,16.41 4,12C4,7.59 7.59,4 12,4C16.41,4 20,7.59 20, 12C20,16.41 16.41,20 12,20M12,2A10,10 0 0,0 2,12A10,10 0 0,0 12,22A10,10 0 0,0 22,12A10, 10 0 0,0 12,2M11,17H13V11H11V17Z"
+                  />
+                </svg>
+              </div>
+              <div
+                class="MuiAlert-message css-zioonp-MuiAlert-message"
+              >
+                <div
+                  class="MuiTypography-root MuiTypography-body1 MuiTypography-gutterBottom MuiAlertTitle-root css-4xzt87-MuiTypography-root-MuiAlertTitle-root"
+                >
+                  How to read the results
+                </div>
+                <ul
+                  class="MuiBox-root css-n1ol3p"
+                >
+                  <li>
+                    Each row is one 
+                    <strong>
+                      platform
+                    </strong>
+                    . 
+                    <strong>
+                      Base
+                    </strong>
+                     is the old build; 
+                    <strong>
+                      New
+                    </strong>
+                     is your change.
+                  </li>
+                  <li>
+                    <strong>
+                      Base
+                    </strong>
+                     and 
+                    <strong>
+                      New
+                    </strong>
+                     show the average result for each build, in the test's unit.
+                  </li>
+                  <li>
+                    <strong>
+                      Δ Median %
+                    </strong>
+                     shows how much the middle result moved from Base to New. A plus sign means New is higher; a minus sign means New is lower.
+                  </li>
+                  <li>
+                    <strong>
+                      Status
+                    </strong>
+                     says whether the change is an
+                     
+                    <strong>
+                      Improvement
+                    </strong>
+                    , a 
+                    <strong>
+                      Regression
+                    </strong>
+                    , or
+                     
+                    <strong>
+                      No change
+                    </strong>
+                    .
+                  </li>
+                  <li>
+                    <strong>
+                      Difference Size
+                    </strong>
+                     says how big the difference is: negligible, small, medium, or large.
+                  </li>
+                  <li>
+                    Tick 
+                    <strong>
+                      Advanced columns
+                    </strong>
+                     to add the expert stats (Cliff's Delta, CLES, Significance).
+                  </li>
+                </ul>
+              </div>
+              <div
+                class="MuiAlert-action css-rgppqo-MuiAlert-action"
+              >
+                <button
+                  aria-label="Close"
+                  class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorInherit MuiIconButton-sizeSmall css-ak37b0-MuiButtonBase-root-MuiIconButton-root"
+                  tabindex="0"
+                  title="Close"
+                  type="button"
+                >
+                  <svg
+                    aria-hidden="true"
+                    class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
+                    data-testid="CloseIcon"
+                    focusable="false"
+                    viewBox="0 0 24 24"
+                  >
+                    <path
+                      d="M19 6.41L17.59 5 12 10.59 6.41 5 5 6.41 10.59 12 5 17.59 6.41 19 12 13.41 17.59 19 19 17.59 13.41 12z"
+                    />
+                  </svg>
+                </button>
+              </div>
+            </div>
             <div
               class="MuiBox-root css-hshm0p"
               data-testid="results-table"
@@ -3804,7 +4080,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                             aria-invalid="false"
                             aria-label="Search by title, platform, revision or options"
                             class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd css-3v3un6-MuiInputBase-input-MuiOutlinedInput-input"
-                            id="_r_qr_"
+                            id="_r_rg_"
                             placeholder="Filter results"
                             type="search"
                             value=""
@@ -4099,6 +4375,38 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                           Advanced columns
                         </span>
                       </label>
+                      <label
+                        aria-label="Show the "How to read the results" guide above the table"
+                        class="MuiFormControlLabel-root MuiFormControlLabel-labelPlacementEnd css-1bsjtco-MuiFormControlLabel-root"
+                        data-mui-internal-clone-element="true"
+                      >
+                        <span
+                          class="MuiButtonBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall PrivateSwitchBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall Mui-checked MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall css-1nff2up-MuiButtonBase-root-MuiSwitchBase-root-MuiCheckbox-root"
+                        >
+                          <input
+                            checked=""
+                            class="PrivateSwitchBase-input css-12xagqm-MuiSwitchBase-root"
+                            data-indeterminate="false"
+                            type="checkbox"
+                          />
+                          <svg
+                            aria-hidden="true"
+                            class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
+                            data-testid="CheckBoxIcon"
+                            focusable="false"
+                            viewBox="0 0 24 24"
+                          >
+                            <path
+                              d="M19 3H5c-1.11 0-2 .9-2 2v14c0 1.1.89 2 2 2h14c1.11 0 2-.9 2-2V5c0-1.1-.89-2-2-2zm-9 14l-5-5 1.41-1.41L10 14.17l7.59-7.59L19 8l-9 9z"
+                            />
+                          </svg>
+                        </span>
+                        <span
+                          class="MuiTypography-root MuiTypography-body1 MuiFormControlLabel-label css-n290n7-MuiTypography-root"
+                        >
+                          How to read the results
+                        </span>
+                      </label>
                       <label
                         aria-label="Expand all rows"
                         class="MuiFormControlLabel-root MuiFormControlLabel-labelPlacementEnd css-1bsjtco-MuiFormControlLabel-root"
@@ -4718,7 +5026,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                                 data-testid="expand-revision-button"
                               >
                                 <button
-                                  aria-controls="_r_rk_"
+                                  aria-controls="_r_sa_"
                                   aria-expanded="false"
                                   class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                                   tabindex="0"
@@ -4930,7 +5238,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                                 data-testid="expand-revision-button"
                               >
                                 <button
-                                  aria-controls="_r_rr_"
+                                  aria-controls="_r_sh_"
                                   aria-expanded="false"
                                   class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                                   tabindex="0"
@@ -5142,7 +5450,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                                 data-testid="expand-revision-button"
                               >
                                 <button
-                                  aria-controls="_r_s2_"
+                                  aria-controls="_r_so_"
                                   aria-expanded="false"
                                   class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                                   tabindex="0"
@@ -5437,7 +5745,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                                 data-testid="expand-revision-button"
                               >
                                 <button
-                                  aria-controls="_r_sa_"
+                                  aria-controls="_r_t0_"
                                   aria-expanded="false"
                                   class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                                   tabindex="0"
@@ -6256,7 +6564,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
           data-testid="expand-revision-button"
         >
           <button
-            aria-controls="_r_va_"
+            aria-controls="_r_104_"
             aria-expanded="false"
             class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
             tabindex="0"
@@ -6507,7 +6815,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
           data-testid="expand-revision-button"
         >
           <button
-            aria-controls="_r_vi_"
+            aria-controls="_r_10c_"
             aria-expanded="false"
             class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
             tabindex="0"
@@ -6816,7 +7124,7 @@ exports[`Results Table should render different blocks when rendering several rev
           data-testid="expand-revision-button"
         >
           <button
-            aria-controls="_r_4l_"
+            aria-controls="_r_4r_"
             aria-expanded="false"
             class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
             tabindex="0"
@@ -7062,7 +7370,7 @@ exports[`Results Table should render different blocks when rendering several rev
           data-testid="expand-revision-button"
         >
           <button
-            aria-controls="_r_4t_"
+            aria-controls="_r_53_"
             aria-expanded="false"
             class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
             tabindex="0"
diff --git a/src/__tests__/CompareResults/__snapshots__/ResultsView.test.tsx.snap b/src/__tests__/CompareResults/__snapshots__/ResultsView.test.tsx.snap
index 2f2e3e661..acb4376af 100644
--- a/src/__tests__/CompareResults/__snapshots__/ResultsView.test.tsx.snap
+++ b/src/__tests__/CompareResults/__snapshots__/ResultsView.test.tsx.snap
@@ -4,7 +4,7 @@ exports[`Results View Should display Base, New and Common graphs with replicates
 <section
   aria-label="Revision Row Details"
   class="MuiBox-root css-13s8wtg"
-  id="_r_bg_"
+  id="_r_bs_"
 >
   <div
     class="MuiStack-root css-1714cpj-MuiStack-root"
@@ -548,7 +548,7 @@ exports[`Results View Should display Base, New and Common graphs with tooltips 1
 <section
   aria-label="Revision Row Details"
   class="MuiBox-root css-13s8wtg"
-  id="_r_a0_"
+  id="_r_aa_"
 >
   <div
     class="MuiStack-root css-1714cpj-MuiStack-root"
@@ -1205,7 +1205,7 @@ exports[`Results View The table should match snapshot and other elements should
                 aria-invalid="false"
                 aria-label="Search by title, platform, revision or options"
                 class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd css-3v3un6-MuiInputBase-input-MuiOutlinedInput-input"
-                id="_r_k_"
+                id="_r_l_"
                 placeholder="Filter results"
                 type="search"
                 value=""
@@ -1499,6 +1499,38 @@ exports[`Results View The table should match snapshot and other elements should
               Advanced columns
             </span>
           </label>
+          <label
+            aria-label="Show the "How to read the results" guide above the table"
+            class="MuiFormControlLabel-root MuiFormControlLabel-labelPlacementEnd css-1bsjtco-MuiFormControlLabel-root"
+            data-mui-internal-clone-element="true"
+          >
+            <span
+              class="MuiButtonBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall PrivateSwitchBase-root MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall Mui-checked MuiCheckbox-root MuiCheckbox-colorPrimary MuiCheckbox-sizeSmall css-1nff2up-MuiButtonBase-root-MuiSwitchBase-root-MuiCheckbox-root"
+            >
+              <input
+                checked=""
+                class="PrivateSwitchBase-input css-12xagqm-MuiSwitchBase-root"
+                data-indeterminate="false"
+                type="checkbox"
+              />
+              <svg
+                aria-hidden="true"
+                class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
+                data-testid="CheckBoxIcon"
+                focusable="false"
+                viewBox="0 0 24 24"
+              >
+                <path
+                  d="M19 3H5c-1.11 0-2 .9-2 2v14c0 1.1.89 2 2 2h14c1.11 0 2-.9 2-2V5c0-1.1-.89-2-2-2zm-9 14l-5-5 1.41-1.41L10 14.17l7.59-7.59L19 8l-9 9z"
+                />
+              </svg>
+            </span>
+            <span
+              class="MuiTypography-root MuiTypography-body1 MuiFormControlLabel-label css-n290n7-MuiTypography-root"
+            >
+              How to read the results
+            </span>
+          </label>
           <label
             aria-label="Expand all rows"
             class="MuiFormControlLabel-root MuiFormControlLabel-labelPlacementEnd css-1bsjtco-MuiFormControlLabel-root"
@@ -2002,7 +2034,7 @@ exports[`Results View The table should match snapshot and other elements should
                     data-testid="expand-revision-button"
                   >
                     <button
-                      aria-controls="_r_18_"
+                      aria-controls="_r_1a_"
                       aria-expanded="false"
                       class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                       tabindex="0"
@@ -2189,7 +2221,7 @@ exports[`Results View The table should match snapshot and other elements should
                     data-testid="expand-revision-button"
                   >
                     <button
-                      aria-controls="_r_1f_"
+                      aria-controls="_r_1h_"
                       aria-expanded="false"
                       class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                       tabindex="0"
@@ -2376,7 +2408,7 @@ exports[`Results View The table should match snapshot and other elements should
                     data-testid="expand-revision-button"
                   >
                     <button
-                      aria-controls="_r_1m_"
+                      aria-controls="_r_1o_"
                       aria-expanded="false"
                       class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                       tabindex="0"
@@ -2563,7 +2595,7 @@ exports[`Results View The table should match snapshot and other elements should
                     data-testid="expand-revision-button"
                   >
                     <button
-                      aria-controls="_r_1t_"
+                      aria-controls="_r_1v_"
                       aria-expanded="false"
                       class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                       tabindex="0"
diff --git a/src/__tests__/CompareResults/__snapshots__/SearchInput.test.tsx.snap b/src/__tests__/CompareResults/__snapshots__/SearchInput.test.tsx.snap
index bbea8143b..6ed31bc6f 100644
--- a/src/__tests__/CompareResults/__snapshots__/SearchInput.test.tsx.snap
+++ b/src/__tests__/CompareResults/__snapshots__/SearchInput.test.tsx.snap
@@ -38,7 +38,7 @@ exports[`Search by title/test name should filter results after a timeout or imme
         aria-invalid="false"
         aria-label="Search by title, platform, revision or options"
         class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd css-3v3un6-MuiInputBase-input-MuiOutlinedInput-input"
-        id="_r_m_"
+        id="_r_n_"
         placeholder="Filter results"
         type="search"
         value=""
diff --git a/src/__tests__/Search/__snapshots__/CompareOverTime.test.tsx.snap b/src/__tests__/Search/__snapshots__/CompareOverTime.test.tsx.snap
index 89536dd15..5955552aa 100644
--- a/src/__tests__/Search/__snapshots__/CompareOverTime.test.tsx.snap
+++ b/src/__tests__/Search/__snapshots__/CompareOverTime.test.tsx.snap
@@ -742,7 +742,7 @@ exports[`Compare Over Time selects and displays new time range when clicked 1`]
 <ul
   aria-labelledby="select-timerange-label"
   class="MuiList-root MuiList-padding MuiMenu-list css-1toxriw-MuiList-root-MuiMenu-list"
-  id="_r_5m_"
+  id="_r_5o_"
   role="listbox"
   tabindex="-1"
 >
@@ -1221,7 +1221,7 @@ exports[`Compare Over Time should have an edit mode in Results View: After click
                     autocapitalize="none"
                     autocomplete="off"
                     class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-16cokj7-MuiInputBase-input-MuiOutlinedInput-input"
-                    id="_r_cl_"
+                    id="_r_cr_"
                     placeholder="Search by revision ID or author email"
                     role="combobox"
                     spellcheck="false"
@@ -2053,7 +2053,7 @@ exports[`Compare Over Time should remove the checked revision once X button is c
                     autocapitalize="none"
                     autocomplete="off"
                     class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-9wexq8-MuiInputBase-input-MuiOutlinedInput-input"
-                    id="_r_7m_"
+                    id="_r_7o_"
                     placeholder="Search by revision ID or author email"
                     role="combobox"
                     spellcheck="false"
@@ -2993,7 +2993,7 @@ exports[`Compare Over Time should update base repo, revisions and time-range aft
                     autocapitalize="none"
                     autocomplete="off"
                     class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-16cokj7-MuiInputBase-input-MuiOutlinedInput-input"
-                    id="_r_dq_"
+                    id="_r_e2_"
                     placeholder="Search by revision ID or author email"
                     role="combobox"
                     spellcheck="false"
diff --git a/src/__tests__/Search/__snapshots__/CompareWithBase.test.tsx.snap b/src/__tests__/Search/__snapshots__/CompareWithBase.test.tsx.snap
index c7d3e44df..645bc3d3a 100644
--- a/src/__tests__/Search/__snapshots__/CompareWithBase.test.tsx.snap
+++ b/src/__tests__/Search/__snapshots__/CompareWithBase.test.tsx.snap
@@ -742,7 +742,7 @@ exports[`Compare With Base selects and displays new framework when clicked 1`] =
 <ul
   aria-labelledby="select-framework-label"
   class="MuiList-root MuiList-padding MuiMenu-list css-1toxriw-MuiList-root-MuiMenu-list"
-  id="_r_2h_"
+  id="_r_2j_"
   role="listbox"
   tabindex="-1"
 >
@@ -1028,7 +1028,7 @@ exports[`Compare With Base should have an edit mode in Results View: After click
                     autocapitalize="none"
                     autocomplete="off"
                     class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-16cokj7-MuiInputBase-input-MuiOutlinedInput-input"
-                    id="_r_48_"
+                    id="_r_4a_"
                     placeholder="Search by revision ID or author email"
                     role="combobox"
                     spellcheck="false"
@@ -1375,7 +1375,7 @@ exports[`Compare With Base should have an edit mode in Results View: After click
                     autocapitalize="none"
                     autocomplete="off"
                     class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-16cokj7-MuiInputBase-input-MuiOutlinedInput-input"
-                    id="_r_4h_"
+                    id="_r_4j_"
                     placeholder="Search by revision ID or author email"
                     role="combobox"
                     spellcheck="false"
@@ -1626,7 +1626,7 @@ exports[`Compare With Base should have an edit mode in Results View: After click
                     autocapitalize="none"
                     autocomplete="off"
                     class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-16cokj7-MuiInputBase-input-MuiOutlinedInput-input"
-                    id="_r_48_"
+                    id="_r_4a_"
                     placeholder="Search by revision ID or author email"
                     role="combobox"
                     spellcheck="false"
@@ -1973,7 +1973,7 @@ exports[`Compare With Base should have an edit mode in Results View: After click
                     autocapitalize="none"
                     autocomplete="off"
                     class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-16cokj7-MuiInputBase-input-MuiOutlinedInput-input"
-                    id="_r_4h_"
+                    id="_r_4j_"
                     placeholder="Search by revision ID or author email"
                     role="combobox"
                     spellcheck="false"
@@ -2388,7 +2388,7 @@ exports[`Compare With Base should have an edit mode in Results View: Initial sta
                     autocapitalize="none"
                     autocomplete="off"
                     class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-16cokj7-MuiInputBase-input-MuiOutlinedInput-input"
-                    id="_r_48_"
+                    id="_r_4a_"
                     placeholder="Search by revision ID or author email"
                     role="combobox"
                     spellcheck="false"
@@ -2735,7 +2735,7 @@ exports[`Compare With Base should have an edit mode in Results View: Initial sta
                     autocapitalize="none"
                     autocomplete="off"
                     class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-16cokj7-MuiInputBase-input-MuiOutlinedInput-input"
-                    id="_r_4h_"
+                    id="_r_4j_"
                     placeholder="Search by revision ID or author email"
                     role="combobox"
                     spellcheck="false"
@@ -3154,7 +3154,7 @@ exports[`Compare With Base should have an edit mode in Results View: after remov
                     autocapitalize="none"
                     autocomplete="off"
                     class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-16cokj7-MuiInputBase-input-MuiOutlinedInput-input"
-                    id="_r_48_"
+                    id="_r_4a_"
                     placeholder="Search by revision ID or author email"
                     role="combobox"
                     spellcheck="false"
@@ -3341,7 +3341,7 @@ exports[`Compare With Base should have an edit mode in Results View: after remov
                     autocapitalize="none"
                     autocomplete="off"
                     class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-16cokj7-MuiInputBase-input-MuiOutlinedInput-input"
-                    id="_r_4h_"
+                    id="_r_4j_"
                     placeholder="Search by revision ID or author email"
                     role="combobox"
                     spellcheck="false"
@@ -3792,7 +3792,7 @@ exports[`Compare With Base should have an edit mode in Results View: after remov
                     autocapitalize="none"
                     autocomplete="off"
                     class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-16cokj7-MuiInputBase-input-MuiOutlinedInput-input"
-                    id="_r_48_"
+                    id="_r_4a_"
                     placeholder="Search by revision ID or author email"
                     role="combobox"
                     spellcheck="false"
@@ -4139,7 +4139,7 @@ exports[`Compare With Base should have an edit mode in Results View: after remov
                     autocapitalize="none"
                     autocomplete="off"
                     class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-16cokj7-MuiInputBase-input-MuiOutlinedInput-input"
-                    id="_r_4h_"
+                    id="_r_4j_"
                     placeholder="Search by revision ID or author email"
                     role="combobox"
                     spellcheck="false"
@@ -4585,7 +4585,7 @@ exports[`Compare With Base should remove the checked revision once X button is c
                                   autocapitalize="none"
                                   autocomplete="off"
                                   class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-9wexq8-MuiInputBase-input-MuiOutlinedInput-input"
-                                  id="_r_33_"
+                                  id="_r_35_"
                                   placeholder="Search by revision ID or author email"
                                   role="combobox"
                                   spellcheck="false"
@@ -4772,7 +4772,7 @@ exports[`Compare With Base should remove the checked revision once X button is c
                                   autocapitalize="none"
                                   autocomplete="off"
                                   class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-9wexq8-MuiInputBase-input-MuiOutlinedInput-input"
-                                  id="_r_38_"
+                                  id="_r_3a_"
                                   placeholder="Search by revision ID or author email"
                                   role="combobox"
                                   spellcheck="false"
@@ -5238,7 +5238,7 @@ exports[`Compare With Base should remove the checked revision once X button is c
                                   autocapitalize="none"
                                   autocomplete="off"
                                   class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-9wexq8-MuiInputBase-input-MuiOutlinedInput-input"
-                                  id="_r_3k_"
+                                  id="_r_3m_"
                                   placeholder="Search by revision ID or author email"
                                   role="combobox"
                                   spellcheck="false"
@@ -5395,7 +5395,7 @@ exports[`Compare With Base should remove the checked revision once X button is c
 exports[`Compare With Base updates the framework and url when a new one is selected: after awsy is selected 1`] = `
 <ul
   class="MuiList-root MuiList-padding MuiMenu-list css-1toxriw-MuiList-root-MuiMenu-list"
-  id="_r_6f_"
+  id="_r_6k_"
   role="listbox"
   tabindex="-1"
 >
diff --git a/src/components/CompareResults/HowToReadResults.tsx b/src/components/CompareResults/HowToReadResults.tsx
new file mode 100644
index 000000000..fc8b98a80
--- /dev/null
+++ b/src/components/CompareResults/HowToReadResults.tsx
@@ -0,0 +1,65 @@
+import Alert from '@mui/material/Alert';
+import AlertTitle from '@mui/material/AlertTitle';
+import Box from '@mui/material/Box';
+
+import { useAppDispatch, useAppSelector } from '../../hooks/app';
+import { updateShowHowToRead } from '../../reducers/ColumnPrefsSlice';
+
+// Beginner-friendly guide shown above the results table, explaining what each
+// column means in plain language.
+function HowToReadResults() {
+  const dispatch = useAppDispatch();
+  const showHowToRead = useAppSelector(
+    (state) => state.columnPrefs.showHowToRead,
+  );
+
+  if (!showHowToRead) {
+    return null;
+  }
+
+  const onClose = () => {
+    dispatch(updateShowHowToRead(false));
+    localStorage.setItem('showHowToRead', 'false');
+  };
+
+  return (
+    <Alert
+      severity='info'
+      onClose={onClose}
+      data-testid='how-to-read-results'
+      sx={{ mb: 2 }}
+    >
+      <AlertTitle>How to read the results</AlertTitle>
+      <Box component='ul' sx={{ m: 0, pl: 2.5 }}>
+        <li>
+          Each row is one <strong>platform</strong>. <strong>Base</strong> is
+          the old build; <strong>New</strong> is your change.
+        </li>
+        <li>
+          <strong>Base</strong> and <strong>New</strong> show the average result
+          for each build, in the test&apos;s unit.
+        </li>
+        <li>
+          <strong>Δ Median %</strong> shows how much the middle result moved
+          from Base to New. A plus sign means New is higher; a minus sign means
+          New is lower.
+        </li>
+        <li>
+          <strong>Status</strong> says whether the change is an{' '}
+          <strong>Improvement</strong>, a <strong>Regression</strong>, or{' '}
+          <strong>No change</strong>.
+        </li>
+        <li>
+          <strong>Difference Size</strong> says how big the difference is:
+          negligible, small, medium, or large.
+        </li>
+        <li>
+          Tick <strong>Advanced columns</strong> to add the expert stats
+          (Cliff&apos;s Delta, CLES, Significance).
+        </li>
+      </Box>
+    </Alert>
+  );
+}
+
+export default HowToReadResults;
diff --git a/src/components/CompareResults/ResultsControls.tsx b/src/components/CompareResults/ResultsControls.tsx
index 0d27c29e4..727366580 100644
--- a/src/components/CompareResults/ResultsControls.tsx
+++ b/src/components/CompareResults/ResultsControls.tsx
@@ -10,7 +10,8 @@ import AdvancedColumnsToggle from './AdvancedColumnsToggle';
 import { DownloadButton } from './DownloadButton';
 import RevisionSelect from './RevisionSelect';
 import SearchInput from './SearchInput';
-import { useAppSelector } from '../../hooks/app';
+import { useAppDispatch, useAppSelector } from '../../hooks/app';
+import { updateShowHowToRead } from '../../reducers/ColumnPrefsSlice';
 import { Strings } from '../../resources/Strings';
 import type { CombinedResultsItemType } from '../../types/state';
 import type { Framework, TestVersion } from '../../types/types';
@@ -46,6 +47,14 @@ export default function ResultsControls({
   onExpandAllChange,
 }: Props) {
   const mode = useAppSelector((state) => state.theme.mode);
+  const dispatch = useAppDispatch();
+  const showHowToRead = useAppSelector(
+    (state) => state.columnPrefs.showHowToRead,
+  );
+  const onShowHowToReadChange = (checked: boolean) => {
+    dispatch(updateShowHowToRead(checked));
+    localStorage.setItem('showHowToRead', String(checked));
+  };
   return (
     <Grid container className={controlsStyles} spacing={2}>
       <Grid
@@ -107,6 +116,18 @@ export default function ResultsControls({
           }}
         >
           <AdvancedColumnsToggle />
+          <Tooltip title='Show the "How to read the results" guide above the table'>
+            <FormControlLabel
+              control={
+                <Checkbox
+                  checked={showHowToRead}
+                  onChange={(e) => onShowHowToReadChange(e.target.checked)}
+                  size='small'
+                />
+              }
+              label='How to read the results'
+            />
+          </Tooltip>
           <Tooltip title='Expand all rows'>
             <FormControlLabel
               control={
diff --git a/src/components/CompareResults/ResultsMain.tsx b/src/components/CompareResults/ResultsMain.tsx
index 85fbfb933..126f92e6d 100644
--- a/src/components/CompareResults/ResultsMain.tsx
+++ b/src/components/CompareResults/ResultsMain.tsx
@@ -7,6 +7,7 @@ import { Container } from '@mui/system';
 import { useLoaderData } from 'react-router';
 import { style } from 'typestyle';
 
+import HowToReadResults from './HowToReadResults';
 import type { LoaderReturnValue } from './loader';
 import type { LoaderReturnValue as OverTimeLoaderReturnValue } from './overTimeLoader';
 import ResultsTable from './ResultsTable';
@@ -192,6 +193,7 @@ function ResultsMain() {
           {testWarnings[testVersion] ?? testWarnings[MANN_WHITNEY_U]}
         </Grid>
       </header>
+      <HowToReadResults />
       <ResultsTable />
     </Container>
   );
diff --git a/src/reducers/ColumnPrefsSlice.ts b/src/reducers/ColumnPrefsSlice.ts
index 03784af5a..36daf17cb 100644
--- a/src/reducers/ColumnPrefsSlice.ts
+++ b/src/reducers/ColumnPrefsSlice.ts
@@ -1,10 +1,18 @@
 import { createSlice, PayloadAction } from '@reduxjs/toolkit';
 
-// Power-user preference: when true the results table shows the advanced
-// columns (CD, CLES, Sig); when false it shows the simplified view. Persisted
-// to localStorage so the choice survives reloads.
-const initialState: { showAdvancedColumns: boolean } = {
+// Results-view display preferences, persisted to localStorage so choices
+// survive reloads:
+//   - showAdvancedColumns: when true the table shows the advanced columns
+//     (CD, CLES, Sig); when false it shows the simplified view.
+//   - showHowToRead: when true the "How to read the results" helper panel is
+//     shown above the table. Defaults on so new contributors get the guidance;
+//     dismissing it (once) is remembered.
+const initialState: {
+  showAdvancedColumns: boolean;
+  showHowToRead: boolean;
+} = {
   showAdvancedColumns: localStorage.getItem('showAdvancedColumns') === 'true',
+  showHowToRead: localStorage.getItem('showHowToRead') !== 'false',
 };
 
 const columnPrefs = createSlice({
@@ -14,8 +22,12 @@ const columnPrefs = createSlice({
     updateShowAdvancedColumns(state, action: PayloadAction<boolean>) {
       state.showAdvancedColumns = action.payload;
     },
+    updateShowHowToRead(state, action: PayloadAction<boolean>) {
+      state.showHowToRead = action.payload;
+    },
   },
 });
 
-export const { updateShowAdvancedColumns } = columnPrefs.actions;
+export const { updateShowAdvancedColumns, updateShowHowToRead } =
+  columnPrefs.actions;
 export default columnPrefs.reducer;

From e78504eb240bd19abc3822c747a5c41cadf07965 Mon Sep 17 00:00:00 2001
From: Carla Severe <csevere@mozilla.com>
Date: Thu, 23 Jul 2026 19:13:36 -0700
Subject: [PATCH 4/6] render 0.00 vs - for no data in median col

---
 src/common/testVersions/mannWhitney.tsx | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/src/common/testVersions/mannWhitney.tsx b/src/common/testVersions/mannWhitney.tsx
index ae964acbc..bac7d2b06 100644
--- a/src/common/testVersions/mannWhitney.tsx
+++ b/src/common/testVersions/mannWhitney.tsx
@@ -145,10 +145,16 @@ export function medianDiffPct(result: MannWhitneyResultsItem): number | null {
 
   const baseMedian = medianOf(result.base_runs ?? []);
   const newMedian = medianOf(result.new_runs ?? []);
-  const value =
-    baseMedian === null || newMedian === null || baseMedian === 0
-      ? null
-      : ((newMedian - baseMedian) / baseMedian) * 100;
+  let value: number | null;
+  if (baseMedian === null || newMedian === null) {
+    // No data to compute from → "-".
+    value = null;
+  } else if (baseMedian === 0) {
+    // A zero base median yields 0% rather than an undefined division.
+    value = 0;
+  } else {
+    value = ((newMedian - baseMedian) / baseMedian) * 100;
+  }
 
   medianDiffPctCache.set(result, value);
   return value;

From fd7039cdb83ba7b1d99429edb3b00f78e9cc24b2 Mon Sep 17 00:00:00 2001
From: Carla Severe <csevere@mozilla.com>
Date: Fri, 24 Jul 2026 16:32:32 -0700
Subject: [PATCH 5/6] update table to include significance; add difference
 below status

---
 src/__tests__/App.test.tsx                    |  13 +-
 .../CompareResults/ResultsTable.test.tsx      | 321 ++++---
 .../SubtestsResultsView.test.tsx              |  82 +-
 .../SubtestsRevisionRow.test.tsx              |   6 +-
 .../OverTimeResultsView.test.tsx.snap         | 107 ++-
 .../__snapshots__/ResultsTable.test.tsx.snap  | 380 ++++----
 .../__snapshots__/ResultsView.test.tsx.snap   | 111 ++-
 .../SubtestsResultsView.test.tsx.snap         | 840 ++++++++++++------
 .../CompareOverTime.test.tsx.snap             |   8 +-
 .../CompareWithBase.test.tsx.snap             |  30 +-
 src/common/constants.ts                       |   4 +-
 src/common/testVersions/mannWhitney.tsx       | 188 ++--
 .../CompareResults/HowToReadResults.tsx       |   9 +-
 13 files changed, 1257 insertions(+), 842 deletions(-)

diff --git a/src/__tests__/App.test.tsx b/src/__tests__/App.test.tsx
index 3a71d0cab..c9c04bad8 100644
--- a/src/__tests__/App.test.tsx
+++ b/src/__tests__/App.test.tsx
@@ -396,15 +396,12 @@ describe('App', () => {
       // Wait for the page to load
       await screen.findByText('a11yr');
 
-      // Verify that Mann-Whitney-U specific columns are rendered in the
-      // default (simplified) view — "Difference Size" and "Δ Median %" are
-      // unique to the Mann-Whitney strategy, so their presence in the table
-      // header indicates the testVersion defaulted to mann-whitney-u. Scope to
-      // the header since the "How to read the results" panel also names them.
+      // Verify a Mann-Whitney-U specific column is rendered — "Δ Median %" is
+      // unique to the Mann-Whitney strategy (Student-T uses "Delta"), so its
+      // presence in the table header indicates the testVersion defaulted to
+      // mann-whitney-u. Scope to the header since the "How to read the results"
+      // panel also names it.
       const tableHeader = screen.getByTestId('table-header');
-      expect(
-        within(tableHeader).getByText('Difference Size'),
-      ).toBeInTheDocument();
       expect(within(tableHeader).getByText('Δ Median %')).toBeInTheDocument();
 
       // Verify the Stats Test Version dropdown shows Mann-Whitney-U as selected
diff --git a/src/__tests__/CompareResults/ResultsTable.test.tsx b/src/__tests__/CompareResults/ResultsTable.test.tsx
index dae55f633..fa7dd9f7b 100644
--- a/src/__tests__/CompareResults/ResultsTable.test.tsx
+++ b/src/__tests__/CompareResults/ResultsTable.test.tsx
@@ -93,7 +93,7 @@ function summarizeVisibleRows(testVersion?: TestVersion, advanced = false) {
               ? [
                   '.platform span',
                   '.median-diff',
-                  '.status',
+                  '.status-hint',
                   '.delta',
                   '.significance',
                   '.effects',
@@ -101,8 +101,8 @@ function summarizeVisibleRows(testVersion?: TestVersion, advanced = false) {
               : [
                   '.platform span',
                   '.median-diff',
-                  '.status',
-                  '.difference-size',
+                  '.status-hint',
+                  '.significance',
                 ]
             : ['.platform span', '.status', '.delta', '.confidence'];
         const rowString = rowClasses
@@ -751,9 +751,9 @@ describe('Results Table for MannWhitneyResultsItem for mann-whitney-u testVersio
     expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html opt e10s fission stylo webrender',
       '  rev: spam',
-      '  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.1, Noise, 25.00 %',
       '  rev: devilrabbit',
-      '  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.1, Noise, 25.00 %',
     ]);
     expect(screen.getByRole('rowgroup')).toMatchSnapshot();
   });
@@ -777,12 +777,12 @@ describe('Results Table for MannWhitneyResultsItem for mann-whitney-u testVersio
     await screen.findByText('a11yr');
     expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html spam opt e10s fission stylo webrender',
-      '  - Android, +1.08%, Improvement, 0.1, -, 25.00 %',
-      '  - inexistant, +1.08%, Improvement, 0.1, -, 25.00 %',
-      '  - Linux 18.04, +1.85%, Regression, -, -, 45.00 %',
-      '  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %',
-      '  - Windows 10, -, , -, , 100.00 %',
-      '  - Windows 10, -2.40%, , -, , 50.00 %',
+      '  - Android, +1.08%, Improvement, 0.1, Noise, 25.00 %',
+      '  - inexistant, +1.08%, Improvement, 0.1, Noise, 25.00 %',
+      '  - Linux 18.04, +1.85%, Regression, -, Noise, 45.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.1, Noise, 25.00 %',
+      '  - Windows 10, -, , -, Real, 100.00 %',
+      '  - Windows 10, -2.40%, , -, Real, 50.00 %',
     ]);
 
     expect(summarizeTableFiltersFromUrl()).toEqual({});
@@ -791,9 +791,9 @@ describe('Results Table for MannWhitneyResultsItem for mann-whitney-u testVersio
     await clickMenuItem(user, 'Platform', /Windows/);
     expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html spam opt e10s fission stylo webrender',
-      '  - Android, +1.08%, Improvement, 0.1, -, 25.00 %',
-      '  - Linux 18.04, +1.85%, Regression, -, -, 45.00 %',
-      '  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %',
+      '  - Android, +1.08%, Improvement, 0.1, Noise, 25.00 %',
+      '  - Linux 18.04, +1.85%, Regression, -, Noise, 45.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.1, Noise, 25.00 %',
     ]);
     expect(summarizeTableFiltersFromUrl()).toEqual({
       platform: ['osx', 'linux', 'android', 'ios'],
@@ -804,12 +804,12 @@ describe('Results Table for MannWhitneyResultsItem for mann-whitney-u testVersio
     await clickMenuItem(user, 'Platform', /Windows/);
     expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html spam opt e10s fission stylo webrender',
-      '  - Android, +1.08%, Improvement, 0.1, -, 25.00 %',
-      '  - inexistant, +1.08%, Improvement, 0.1, -, 25.00 %',
-      '  - Linux 18.04, +1.85%, Regression, -, -, 45.00 %',
-      '  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %',
-      '  - Windows 10, -, , -, , 100.00 %',
-      '  - Windows 10, -2.40%, , -, , 50.00 %',
+      '  - Android, +1.08%, Improvement, 0.1, Noise, 25.00 %',
+      '  - inexistant, +1.08%, Improvement, 0.1, Noise, 25.00 %',
+      '  - Linux 18.04, +1.85%, Regression, -, Noise, 45.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.1, Noise, 25.00 %',
+      '  - Windows 10, -, , -, Real, 100.00 %',
+      '  - Windows 10, -2.40%, , -, Real, 50.00 %',
     ]);
     expect(summarizeTableFiltersFromUrl()).toEqual({});
 
@@ -817,8 +817,8 @@ describe('Results Table for MannWhitneyResultsItem for mann-whitney-u testVersio
     await clickMenuItem(user, 'Platform', /Linux/);
     expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html spam opt e10s fission stylo webrender',
-      '  - Android, +1.08%, Improvement, 0.1, -, 25.00 %',
-      '  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %',
+      '  - Android, +1.08%, Improvement, 0.1, Noise, 25.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.1, Noise, 25.00 %',
     ]);
     expect(summarizeTableFiltersFromUrl()).toEqual({
       platform: ['osx', 'android', 'ios'],
@@ -827,9 +827,9 @@ describe('Results Table for MannWhitneyResultsItem for mann-whitney-u testVersio
     await clickMenuItem(user, 'Platform', /Linux/);
     expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html spam opt e10s fission stylo webrender',
-      '  - Android, +1.08%, Improvement, 0.1, -, 25.00 %',
-      '  - Linux 18.04, +1.85%, Regression, -, -, 45.00 %',
-      '  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %',
+      '  - Android, +1.08%, Improvement, 0.1, Noise, 25.00 %',
+      '  - Linux 18.04, +1.85%, Regression, -, Noise, 45.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.1, Noise, 25.00 %',
     ]);
     expect(summarizeTableFiltersFromUrl()).toEqual({
       platform: ['osx', 'android', 'ios', 'linux'],
@@ -838,22 +838,22 @@ describe('Results Table for MannWhitneyResultsItem for mann-whitney-u testVersio
     await clickMenuItem(user, 'Platform', 'Select all values');
     expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html spam opt e10s fission stylo webrender',
-      '  - Android, +1.08%, Improvement, 0.1, -, 25.00 %',
-      '  - inexistant, +1.08%, Improvement, 0.1, -, 25.00 %',
-      '  - Linux 18.04, +1.85%, Regression, -, -, 45.00 %',
-      '  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %',
-      '  - Windows 10, -, , -, , 100.00 %',
-      '  - Windows 10, -2.40%, , -, , 50.00 %',
+      '  - Android, +1.08%, Improvement, 0.1, Noise, 25.00 %',
+      '  - inexistant, +1.08%, Improvement, 0.1, Noise, 25.00 %',
+      '  - Linux 18.04, +1.85%, Regression, -, Noise, 45.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.1, Noise, 25.00 %',
+      '  - Windows 10, -, , -, Real, 100.00 %',
+      '  - Windows 10, -2.40%, , -, Real, 50.00 %',
     ]);
     expect(summarizeTableFiltersFromUrl()).toEqual({});
 
     await clickMenuItem(user, 'Platform', /macOS/);
     expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html spam opt e10s fission stylo webrender',
-      '  - Android, +1.08%, Improvement, 0.1, -, 25.00 %',
-      '  - Linux 18.04, +1.85%, Regression, -, -, 45.00 %',
-      '  - Windows 10, -, , -, , 100.00 %',
-      '  - Windows 10, -2.40%, , -, , 50.00 %',
+      '  - Android, +1.08%, Improvement, 0.1, Noise, 25.00 %',
+      '  - Linux 18.04, +1.85%, Regression, -, Noise, 45.00 %',
+      '  - Windows 10, -, , -, Real, 100.00 %',
+      '  - Windows 10, -2.40%, , -, Real, 50.00 %',
     ]);
     expect(summarizeTableFiltersFromUrl()).toEqual({
       platform: ['windows', 'linux', 'android', 'ios'],
@@ -862,9 +862,9 @@ describe('Results Table for MannWhitneyResultsItem for mann-whitney-u testVersio
     await clickMenuItem(user, 'Platform', /Android/);
     expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html spam opt e10s fission stylo webrender',
-      '  - Linux 18.04, +1.85%, Regression, -, -, 45.00 %',
-      '  - Windows 10, -, , -, , 100.00 %',
-      '  - Windows 10, -2.40%, , -, , 50.00 %',
+      '  - Linux 18.04, +1.85%, Regression, -, Noise, 45.00 %',
+      '  - Windows 10, -, , -, Real, 100.00 %',
+      '  - Windows 10, -2.40%, , -, Real, 50.00 %',
     ]);
     expect(summarizeTableFiltersFromUrl()).toEqual({
       platform: ['windows', 'linux', 'ios'],
@@ -873,7 +873,7 @@ describe('Results Table for MannWhitneyResultsItem for mann-whitney-u testVersio
     await clickMenuItem(user, 'Platform', /Select only.*Android/);
     expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html spam opt e10s fission stylo webrender',
-      '  - Android, +1.08%, Improvement, 0.1, -, 25.00 %',
+      '  - Android, +1.08%, Improvement, 0.1, Noise, 25.00 %',
     ]);
     expect(summarizeTableFiltersFromUrl()).toEqual({
       platform: ['android'],
@@ -887,16 +887,16 @@ describe('Results Table for MannWhitneyResultsItem for mann-whitney-u testVersio
 
     const user = userEvent.setup({ advanceTimers: jest.advanceTimersByTime });
 
-    // Filter only "Significant"
+    // Filter only "Real" (significant)
     const signifianceMenu = await screen.findByRole('button', {
       name: /Sig.*filter/,
     });
     await user.click(signifianceMenu);
     expect(signifianceMenu).toMatchSnapshot();
 
-    // significant item 0 and Not significant item 1
+    // "Real" is item 0, "Noise" (not significant) is item 1
     const significantOptions = await screen.findAllByRole('menuitemcheckbox', {
-      name: /Significant/,
+      name: /Real|Noise/,
     });
     await user.click(significantOptions[1]);
     await user.keyboard('[Escape]');
@@ -912,10 +912,10 @@ describe('Results Table for MannWhitneyResultsItem for mann-whitney-u testVersio
     await screen.findByText('a11yr');
     expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html spam opt e10s fission stylo webrender',
-      '  - Linux 18.04, +1.85%, Regression, -, -, 45.00 %',
-      '  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %',
-      '  - Windows 10, -, , -, , 100.00 %',
-      '  - Windows 10, -2.40%, , -, , 50.00 %',
+      '  - Linux 18.04, +1.85%, Regression, -, Noise, 45.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.1, Noise, 25.00 %',
+      '  - Windows 10, -, , -, Real, 100.00 %',
+      '  - Windows 10, -2.40%, , -, Real, 50.00 %',
     ]);
     expect(summarizeTableFiltersFromUrl()).toEqual({});
 
@@ -923,8 +923,8 @@ describe('Results Table for MannWhitneyResultsItem for mann-whitney-u testVersio
     await clickMenuItem(user, 'Status', /No changes/);
     expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html spam opt e10s fission stylo webrender',
-      '  - Linux 18.04, +1.85%, Regression, -, -, 45.00 %',
-      '  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %',
+      '  - Linux 18.04, +1.85%, Regression, -, Noise, 45.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.1, Noise, 25.00 %',
     ]);
     expect(summarizeTableFiltersFromUrl()).toEqual({
       status: ['improvement', 'regression'],
@@ -933,7 +933,7 @@ describe('Results Table for MannWhitneyResultsItem for mann-whitney-u testVersio
     await clickMenuItem(user, 'Status', /Improvement/);
     expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html spam opt e10s fission stylo webrender',
-      '  - Linux 18.04, +1.85%, Regression, -, -, 45.00 %',
+      '  - Linux 18.04, +1.85%, Regression, -, Noise, 45.00 %',
     ]);
     expect(summarizeTableFiltersFromUrl()).toEqual({
       status: ['regression'],
@@ -943,9 +943,9 @@ describe('Results Table for MannWhitneyResultsItem for mann-whitney-u testVersio
     await clickMenuItem(user, 'Status', /Regression/);
     expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html spam opt e10s fission stylo webrender',
-      '  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %',
-      '  - Windows 10, -, , -, , 100.00 %',
-      '  - Windows 10, -2.40%, , -, , 50.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.1, Noise, 25.00 %',
+      '  - Windows 10, -, , -, Real, 100.00 %',
+      '  - Windows 10, -2.40%, , -, Real, 50.00 %',
     ]);
     expect(summarizeTableFiltersFromUrl()).toEqual({
       status: ['none', 'improvement'],
@@ -954,17 +954,17 @@ describe('Results Table for MannWhitneyResultsItem for mann-whitney-u testVersio
     await clickMenuItem(user, 'Status', /Regression/);
     expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html spam opt e10s fission stylo webrender',
-      '  - Linux 18.04, +1.85%, Regression, -, -, 45.00 %',
-      '  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %',
-      '  - Windows 10, -, , -, , 100.00 %',
-      '  - Windows 10, -2.40%, , -, , 50.00 %',
+      '  - Linux 18.04, +1.85%, Regression, -, Noise, 45.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.1, Noise, 25.00 %',
+      '  - Windows 10, -, , -, Real, 100.00 %',
+      '  - Windows 10, -2.40%, , -, Real, 50.00 %',
     ]);
     expect(summarizeTableFiltersFromUrl()).toEqual({});
 
     await clickMenuItem(user, 'Status', /Select only.*Regression/);
     expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html spam opt e10s fission stylo webrender',
-      '  - Linux 18.04, +1.85%, Regression, -, -, 45.00 %',
+      '  - Linux 18.04, +1.85%, Regression, -, Noise, 45.00 %',
     ]);
     expect(summarizeTableFiltersFromUrl()).toEqual({
       status: ['regression'],
@@ -973,7 +973,7 @@ describe('Results Table for MannWhitneyResultsItem for mann-whitney-u testVersio
     await clickMenuItem(user, 'Status', /Select only.*Improvement/);
     expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html spam opt e10s fission stylo webrender',
-      '  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.1, Noise, 25.00 %',
     ]);
     expect(summarizeTableFiltersFromUrl()).toEqual({
       status: ['improvement'],
@@ -990,12 +990,12 @@ describe('Results Table for MannWhitneyResultsItem for mann-whitney-u testVersio
 
     expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html spam opt e10s fission stylo webrender',
-      '  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.1, Noise, 25.00 %',
     ]);
     const user = userEvent.setup({ advanceTimers: jest.advanceTimersByTime });
     expect(await summarizeTableFiltersFromCheckboxes(user)).toEqual({
       'Platform(2)': ['macOS', 'Android'],
-      'Sig(2)': ['Significant', 'Not Significant-'],
+      'Sig(2)': ['Real', 'Noise'],
       'Status(3)': ['No changes', 'Improvement', 'Regression'],
     });
 
@@ -1026,26 +1026,26 @@ describe('Results Table for MannWhitneyResultsItem for mann-whitney-u testVersio
     expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr aria.html opt e10s fission stylo webrender',
       '  rev: spam',
-      '  - Linux 18.04, +1.85%, Regression, 1.2, -, 44.00 %',
-      '  - macOS 10.15, +1.08%, Improvement, 1.3, -, 24.00 %',
-      '  - Windows 10, -, , 1.2, , 99.00 %',
-      '  - Windows 10, -2.40%, , 1.2, , 49.00 %',
+      '  - Linux 18.04, +1.85%, Regression, 1.2, Noise, 44.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 1.3, Noise, 24.00 %',
+      '  - Windows 10, -, , 1.2, Real, 99.00 %',
+      '  - Windows 10, -2.40%, , 1.2, Real, 49.00 %',
       '  rev: tictactoe',
-      '  - Linux 18.04, +1.85%, Regression, 2, -, 43.00 %',
-      '  - macOS 10.15, +1.08%, Improvement, 2.1, -, 23.00 %',
-      '  - Windows 10, -, , 2, , 98.00 %',
-      '  - Windows 10, -2.40%, , 2, , 48.00 %',
+      '  - Linux 18.04, +1.85%, Regression, 2, Noise, 43.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 2.1, Noise, 23.00 %',
+      '  - Windows 10, -, , 2, Real, 98.00 %',
+      '  - Windows 10, -2.40%, , 2, Real, 48.00 %',
       'a11yr dhtml.html opt e10s fission stylo webrender',
       '  rev: spam',
-      '  - Linux 18.04, +1.85%, Regression, -, -, 45.00 %',
-      '  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %',
-      '  - Windows 10, -, , -, , 100.00 %',
-      '  - Windows 10, -2.40%, , -, , 50.00 %',
+      '  - Linux 18.04, +1.85%, Regression, -, Noise, 45.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.1, Noise, 25.00 %',
+      '  - Windows 10, -, , -, Real, 100.00 %',
+      '  - Windows 10, -2.40%, , -, Real, 50.00 %',
       '  rev: tictactoe',
-      '  - Linux 18.04, +1.85%, Regression, 0.8, -, 44.00 %',
-      '  - macOS 10.15, +1.08%, Improvement, 0.9, -, 24.00 %',
-      '  - Windows 10, -, , 0.8, , 99.00 %',
-      '  - Windows 10, -2.40%, , 0.8, , 49.00 %',
+      '  - Linux 18.04, +1.85%, Regression, 0.8, Noise, 44.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.9, Noise, 24.00 %',
+      '  - Windows 10, -, , 0.8, Real, 99.00 %',
+      '  - Windows 10, -2.40%, , 0.8, Real, 49.00 %',
     ]);
     // It should have the "descending" SVG.
     expect(deltaButton).toMatchSnapshot();
@@ -1057,26 +1057,26 @@ describe('Results Table for MannWhitneyResultsItem for mann-whitney-u testVersio
     expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr aria.html opt e10s fission stylo webrender',
       '  rev: tictactoe',
-      '  - macOS 10.15, +1.08%, Improvement, 2.1, -, 23.00 %',
-      '  - Linux 18.04, +1.85%, Regression, 2, -, 43.00 %',
-      '  - Windows 10, -2.40%, , 2, , 48.00 %',
-      '  - Windows 10, -, , 2, , 98.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 2.1, Noise, 23.00 %',
+      '  - Linux 18.04, +1.85%, Regression, 2, Noise, 43.00 %',
+      '  - Windows 10, -2.40%, , 2, Real, 48.00 %',
+      '  - Windows 10, -, , 2, Real, 98.00 %',
       '  rev: spam',
-      '  - macOS 10.15, +1.08%, Improvement, 1.3, -, 24.00 %',
-      '  - Linux 18.04, +1.85%, Regression, 1.2, -, 44.00 %',
-      '  - Windows 10, -2.40%, , 1.2, , 49.00 %',
-      '  - Windows 10, -, , 1.2, , 99.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 1.3, Noise, 24.00 %',
+      '  - Linux 18.04, +1.85%, Regression, 1.2, Noise, 44.00 %',
+      '  - Windows 10, -2.40%, , 1.2, Real, 49.00 %',
+      '  - Windows 10, -, , 1.2, Real, 99.00 %',
       'a11yr dhtml.html opt e10s fission stylo webrender',
       '  rev: tictactoe',
-      '  - macOS 10.15, +1.08%, Improvement, 0.9, -, 24.00 %',
-      '  - Linux 18.04, +1.85%, Regression, 0.8, -, 44.00 %',
-      '  - Windows 10, -2.40%, , 0.8, , 49.00 %',
-      '  - Windows 10, -, , 0.8, , 99.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.9, Noise, 24.00 %',
+      '  - Linux 18.04, +1.85%, Regression, 0.8, Noise, 44.00 %',
+      '  - Windows 10, -2.40%, , 0.8, Real, 49.00 %',
+      '  - Windows 10, -, , 0.8, Real, 99.00 %',
       '  rev: spam',
-      '  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %',
-      '  - Linux 18.04, +1.85%, Regression, -, -, 45.00 %',
-      '  - Windows 10, -2.40%, , -, , 50.00 %',
-      '  - Windows 10, -, , -, , 100.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.1, Noise, 25.00 %',
+      '  - Linux 18.04, +1.85%, Regression, -, Noise, 45.00 %',
+      '  - Windows 10, -2.40%, , -, Real, 50.00 %',
+      '  - Windows 10, -, , -, Real, 100.00 %',
     ]);
     // It should have the "ascending" SVG.
     expect(deltaButton).toMatchSnapshot();
@@ -1091,26 +1091,26 @@ describe('Results Table for MannWhitneyResultsItem for mann-whitney-u testVersio
     expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr aria.html opt e10s fission stylo webrender',
       '  rev: tictactoe',
-      '  - macOS 10.15, +1.08%, Improvement, 2.1, -, 23.00 %',
-      '  - Linux 18.04, +1.85%, Regression, 2, -, 43.00 %',
-      '  - Windows 10, -, , 2, , 98.00 %',
-      '  - Windows 10, -2.40%, , 2, , 48.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 2.1, Noise, 23.00 %',
+      '  - Linux 18.04, +1.85%, Regression, 2, Noise, 43.00 %',
+      '  - Windows 10, -, , 2, Real, 98.00 %',
+      '  - Windows 10, -2.40%, , 2, Real, 48.00 %',
       '  rev: spam',
-      '  - macOS 10.15, +1.08%, Improvement, 1.3, -, 24.00 %',
-      '  - Linux 18.04, +1.85%, Regression, 1.2, -, 44.00 %',
-      '  - Windows 10, -, , 1.2, , 99.00 %',
-      '  - Windows 10, -2.40%, , 1.2, , 49.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 1.3, Noise, 24.00 %',
+      '  - Linux 18.04, +1.85%, Regression, 1.2, Noise, 44.00 %',
+      '  - Windows 10, -, , 1.2, Real, 99.00 %',
+      '  - Windows 10, -2.40%, , 1.2, Real, 49.00 %',
       'a11yr dhtml.html opt e10s fission stylo webrender',
       '  rev: tictactoe',
-      '  - macOS 10.15, +1.08%, Improvement, 0.9, -, 24.00 %',
-      '  - Linux 18.04, +1.85%, Regression, 0.8, -, 44.00 %',
-      '  - Windows 10, -, , 0.8, , 99.00 %',
-      '  - Windows 10, -2.40%, , 0.8, , 49.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.9, Noise, 24.00 %',
+      '  - Linux 18.04, +1.85%, Regression, 0.8, Noise, 44.00 %',
+      '  - Windows 10, -, , 0.8, Real, 99.00 %',
+      '  - Windows 10, -2.40%, , 0.8, Real, 49.00 %',
       '  rev: spam',
-      '  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %',
-      '  - Linux 18.04, +1.85%, Regression, -, -, 45.00 %',
-      '  - Windows 10, -, , -, , 100.00 %',
-      '  - Windows 10, -2.40%, , -, , 50.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.1, Noise, 25.00 %',
+      '  - Linux 18.04, +1.85%, Regression, -, Noise, 45.00 %',
+      '  - Windows 10, -, , -, Real, 100.00 %',
+      '  - Windows 10, -2.40%, , -, Real, 50.00 %',
     ]);
     // It should have the "descending" SVG.
     expect(significanceButton).toMatchSnapshot();
@@ -1122,26 +1122,26 @@ describe('Results Table for MannWhitneyResultsItem for mann-whitney-u testVersio
     expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html opt e10s fission stylo webrender',
       '  rev: spam',
-      '  - Windows 10, -2.40%, , -, , 50.00 %',
-      '  - Windows 10, -, , -, , 100.00 %',
-      '  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %',
-      '  - Linux 18.04, +1.85%, Regression, -, -, 45.00 %',
+      '  - Windows 10, -2.40%, , -, Real, 50.00 %',
+      '  - Windows 10, -, , -, Real, 100.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.1, Noise, 25.00 %',
+      '  - Linux 18.04, +1.85%, Regression, -, Noise, 45.00 %',
       '  rev: tictactoe',
-      '  - Windows 10, -2.40%, , 0.8, , 49.00 %',
-      '  - Windows 10, -, , 0.8, , 99.00 %',
-      '  - macOS 10.15, +1.08%, Improvement, 0.9, -, 24.00 %',
-      '  - Linux 18.04, +1.85%, Regression, 0.8, -, 44.00 %',
+      '  - Windows 10, -2.40%, , 0.8, Real, 49.00 %',
+      '  - Windows 10, -, , 0.8, Real, 99.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.9, Noise, 24.00 %',
+      '  - Linux 18.04, +1.85%, Regression, 0.8, Noise, 44.00 %',
       'a11yr aria.html opt e10s fission stylo webrender',
       '  rev: spam',
-      '  - Windows 10, -2.40%, , 1.2, , 49.00 %',
-      '  - Windows 10, -, , 1.2, , 99.00 %',
-      '  - macOS 10.15, +1.08%, Improvement, 1.3, -, 24.00 %',
-      '  - Linux 18.04, +1.85%, Regression, 1.2, -, 44.00 %',
+      '  - Windows 10, -2.40%, , 1.2, Real, 49.00 %',
+      '  - Windows 10, -, , 1.2, Real, 99.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 1.3, Noise, 24.00 %',
+      '  - Linux 18.04, +1.85%, Regression, 1.2, Noise, 44.00 %',
       '  rev: tictactoe',
-      '  - Windows 10, -2.40%, , 2, , 48.00 %',
-      '  - Windows 10, -, , 2, , 98.00 %',
-      '  - macOS 10.15, +1.08%, Improvement, 2.1, -, 23.00 %',
-      '  - Linux 18.04, +1.85%, Regression, 2, -, 43.00 %',
+      '  - Windows 10, -2.40%, , 2, Real, 48.00 %',
+      '  - Windows 10, -, , 2, Real, 98.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 2.1, Noise, 23.00 %',
+      '  - Linux 18.04, +1.85%, Regression, 2, Noise, 43.00 %',
     ]);
     // It should have the "descending" SVG.
     expect(significanceButton).toMatchSnapshot();
@@ -1156,26 +1156,26 @@ describe('Results Table for MannWhitneyResultsItem for mann-whitney-u testVersio
     expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html opt e10s fission stylo webrender',
       '  rev: spam',
-      '  - Windows 10, -, , -, , 100.00 %',
-      '  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %',
-      '  - Linux 18.04, +1.85%, Regression, -, -, 45.00 %',
-      '  - Windows 10, -2.40%, , -, , 50.00 %',
+      '  - Windows 10, -, , -, Real, 100.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.1, Noise, 25.00 %',
+      '  - Linux 18.04, +1.85%, Regression, -, Noise, 45.00 %',
+      '  - Windows 10, -2.40%, , -, Real, 50.00 %',
       '  rev: tictactoe',
-      '  - Windows 10, -, , 0.8, , 99.00 %',
-      '  - macOS 10.15, +1.08%, Improvement, 0.9, -, 24.00 %',
-      '  - Linux 18.04, +1.85%, Regression, 0.8, -, 44.00 %',
-      '  - Windows 10, -2.40%, , 0.8, , 49.00 %',
+      '  - Windows 10, -, , 0.8, Real, 99.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.9, Noise, 24.00 %',
+      '  - Linux 18.04, +1.85%, Regression, 0.8, Noise, 44.00 %',
+      '  - Windows 10, -2.40%, , 0.8, Real, 49.00 %',
       'a11yr aria.html opt e10s fission stylo webrender',
       '  rev: spam',
-      '  - Windows 10, -, , 1.2, , 99.00 %',
-      '  - macOS 10.15, +1.08%, Improvement, 1.3, -, 24.00 %',
-      '  - Linux 18.04, +1.85%, Regression, 1.2, -, 44.00 %',
-      '  - Windows 10, -2.40%, , 1.2, , 49.00 %',
+      '  - Windows 10, -, , 1.2, Real, 99.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 1.3, Noise, 24.00 %',
+      '  - Linux 18.04, +1.85%, Regression, 1.2, Noise, 44.00 %',
+      '  - Windows 10, -2.40%, , 1.2, Real, 49.00 %',
       '  rev: tictactoe',
-      '  - Windows 10, -, , 2, , 98.00 %',
-      '  - macOS 10.15, +1.08%, Improvement, 2.1, -, 23.00 %',
-      '  - Linux 18.04, +1.85%, Regression, 2, -, 43.00 %',
-      '  - Windows 10, -2.40%, , 2, , 48.00 %',
+      '  - Windows 10, -, , 2, Real, 98.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 2.1, Noise, 23.00 %',
+      '  - Linux 18.04, +1.85%, Regression, 2, Noise, 43.00 %',
+      '  - Windows 10, -2.40%, , 2, Real, 48.00 %',
     ]);
 
     expect(effectSizeButton).toMatchSnapshot();
@@ -1187,26 +1187,26 @@ describe('Results Table for MannWhitneyResultsItem for mann-whitney-u testVersio
     expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
       'a11yr dhtml.html opt e10s fission stylo webrender',
       '  rev: spam',
-      '  - Windows 10, -2.40%, , -, , 50.00 %',
-      '  - Linux 18.04, +1.85%, Regression, -, -, 45.00 %',
-      '  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %',
-      '  - Windows 10, -, , -, , 100.00 %',
+      '  - Windows 10, -2.40%, , -, Real, 50.00 %',
+      '  - Linux 18.04, +1.85%, Regression, -, Noise, 45.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.1, Noise, 25.00 %',
+      '  - Windows 10, -, , -, Real, 100.00 %',
       '  rev: tictactoe',
-      '  - Windows 10, -2.40%, , 0.8, , 49.00 %',
-      '  - Linux 18.04, +1.85%, Regression, 0.8, -, 44.00 %',
-      '  - macOS 10.15, +1.08%, Improvement, 0.9, -, 24.00 %',
-      '  - Windows 10, -, , 0.8, , 99.00 %',
+      '  - Windows 10, -2.40%, , 0.8, Real, 49.00 %',
+      '  - Linux 18.04, +1.85%, Regression, 0.8, Noise, 44.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 0.9, Noise, 24.00 %',
+      '  - Windows 10, -, , 0.8, Real, 99.00 %',
       'a11yr aria.html opt e10s fission stylo webrender',
       '  rev: spam',
-      '  - Windows 10, -2.40%, , 1.2, , 49.00 %',
-      '  - Linux 18.04, +1.85%, Regression, 1.2, -, 44.00 %',
-      '  - macOS 10.15, +1.08%, Improvement, 1.3, -, 24.00 %',
-      '  - Windows 10, -, , 1.2, , 99.00 %',
+      '  - Windows 10, -2.40%, , 1.2, Real, 49.00 %',
+      '  - Linux 18.04, +1.85%, Regression, 1.2, Noise, 44.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 1.3, Noise, 24.00 %',
+      '  - Windows 10, -, , 1.2, Real, 99.00 %',
       '  rev: tictactoe',
-      '  - Windows 10, -2.40%, , 2, , 48.00 %',
-      '  - Linux 18.04, +1.85%, Regression, 2, -, 43.00 %',
-      '  - macOS 10.15, +1.08%, Improvement, 2.1, -, 23.00 %',
-      '  - Windows 10, -, , 2, , 98.00 %',
+      '  - Windows 10, -2.40%, , 2, Real, 48.00 %',
+      '  - Linux 18.04, +1.85%, Regression, 2, Noise, 43.00 %',
+      '  - macOS 10.15, +1.08%, Improvement, 2.1, Noise, 23.00 %',
+      '  - Windows 10, -, , 2, Real, 98.00 %',
     ]);
     expect(effectSizeButton).toMatchSnapshot();
     // It should be persisted in the URL
@@ -1279,19 +1279,19 @@ describe('Results Table for MannWhitneyResultsItem for mann-whitney-u testVersio
 });
 
 describe('Advanced-columns toggle for mann-whitney-u testVersion', () => {
-  it('shows Difference Size and hides CD/CLES/Sig in the simplified (default) view', async () => {
+  it('shows Sig but hides CD/CLES in the simplified (default) view', async () => {
     const { testCompareMannWhitneyData } = getTestData();
     setupAndRender(testCompareMannWhitneyData, 'test_version=mann-whitney-u');
     await screen.findByText('a11yr');
 
     const header = screen.getByTestId('table-header');
-    expect(header.querySelector('.difference-size-header')).toBeTruthy();
+    // Sig is shown in both views; CD/CLES are advanced-only.
+    expect(header.querySelector('.significance-header')).toBeTruthy();
     expect(header.querySelector('.delta-header')).toBeFalsy();
     expect(header.querySelector('.effects-header')).toBeFalsy();
-    expect(header.querySelector('.significance-header')).toBeFalsy();
   });
 
-  it('shows CD/CLES/Sig and hides Difference Size when advanced columns are enabled', async () => {
+  it('reveals CD/CLES when advanced columns are enabled (Sig stays)', async () => {
     enableAdvancedColumns();
     const { testCompareMannWhitneyData } = getTestData();
     setupAndRender(testCompareMannWhitneyData, 'test_version=mann-whitney-u');
@@ -1301,6 +1301,5 @@ describe('Advanced-columns toggle for mann-whitney-u testVersion', () => {
     expect(header.querySelector('.delta-header')).toBeTruthy();
     expect(header.querySelector('.effects-header')).toBeTruthy();
     expect(header.querySelector('.significance-header')).toBeTruthy();
-    expect(header.querySelector('.difference-size-header')).toBeFalsy();
   });
 });
diff --git a/src/__tests__/CompareResults/SubtestsResultsView.test.tsx b/src/__tests__/CompareResults/SubtestsResultsView.test.tsx
index 522c3b35c..d5737351a 100644
--- a/src/__tests__/CompareResults/SubtestsResultsView.test.tsx
+++ b/src/__tests__/CompareResults/SubtestsResultsView.test.tsx
@@ -65,7 +65,7 @@ function summarizeVisibleRows(testVersion?: TestVersion, advanced = false) {
       testVersion === 'mann-whitney-u'
         ? advanced
           ? ['.median-diff', '.delta', '.significance', '.effects']
-          : ['.median-diff', '.status', '.difference-size']
+          : ['.median-diff', '.status-hint', '.significance']
         : ['.delta', '.confidence'];
     const rowString = rowClasses
       .map((selector) => {
@@ -545,10 +545,10 @@ describe('SubtestsResultsView Component Tests for mann-whitney-u testVersion', (
       await setupForSorting();
       // Initial view (alphabetical ordered, even if "sort by subtests" isn't specified
       expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
-        'browser.html: +1.14%, -0.04, -, 15.00%',
-        'dhtml.html: +1.14%, 0.02, , 60.00%',
-        'improvement.html: +1.14%, -0.05, , 50.00%',
-        'regression.html: +1.14%, 0.12, , 25.00%',
+        'browser.html: +1.14%, -0.04, Noise, 15.00%',
+        'dhtml.html: +1.14%, 0.02, Real, 60.00%',
+        'improvement.html: +1.14%, -0.05, Real, 50.00%',
+        'regression.html: +1.14%, 0.12, Real, 25.00%',
         'tablemutation.html: +0.98%, 0.01, -, 45.00%',
       ]);
 
@@ -560,10 +560,10 @@ describe('SubtestsResultsView Component Tests for mann-whitney-u testVersion', (
       // Sort descending
       await user.click(deltaButton);
       expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
-        'regression.html: +1.14%, 0.12, , 25.00%',
-        'improvement.html: +1.14%, -0.05, , 50.00%',
-        'browser.html: +1.14%, -0.04, -, 15.00%',
-        'dhtml.html: +1.14%, 0.02, , 60.00%',
+        'regression.html: +1.14%, 0.12, Real, 25.00%',
+        'improvement.html: +1.14%, -0.05, Real, 50.00%',
+        'browser.html: +1.14%, -0.04, Noise, 15.00%',
+        'dhtml.html: +1.14%, 0.02, Real, 60.00%',
         'tablemutation.html: +0.98%, 0.01, -, 45.00%',
       ]);
 
@@ -576,10 +576,10 @@ describe('SubtestsResultsView Component Tests for mann-whitney-u testVersion', (
       await user.click(deltaButton);
       expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
         'tablemutation.html: +0.98%, 0.01, -, 45.00%',
-        'dhtml.html: +1.14%, 0.02, , 60.00%',
-        'browser.html: +1.14%, -0.04, -, 15.00%',
-        'improvement.html: +1.14%, -0.05, , 50.00%',
-        'regression.html: +1.14%, 0.12, , 25.00%',
+        'dhtml.html: +1.14%, 0.02, Real, 60.00%',
+        'browser.html: +1.14%, -0.04, Noise, 15.00%',
+        'improvement.html: +1.14%, -0.05, Real, 50.00%',
+        'regression.html: +1.14%, 0.12, Real, 25.00%',
       ]);
       // It should have the "ascending" SVG.
       expect(deltaButton).toMatchSnapshot();
@@ -592,11 +592,11 @@ describe('SubtestsResultsView Component Tests for mann-whitney-u testVersion', (
       });
       await user.click(significanceButton);
       expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
-        'browser.html: +1.14%, -0.04, -, 15.00%',
+        'browser.html: +1.14%, -0.04, Noise, 15.00%',
         'tablemutation.html: +0.98%, 0.01, -, 45.00%',
-        'dhtml.html: +1.14%, 0.02, , 60.00%',
-        'regression.html: +1.14%, 0.12, , 25.00%',
-        'improvement.html: +1.14%, -0.05, , 50.00%',
+        'dhtml.html: +1.14%, 0.02, Real, 60.00%',
+        'regression.html: +1.14%, 0.12, Real, 25.00%',
+        'improvement.html: +1.14%, -0.05, Real, 50.00%',
       ]);
       // It should have the "no sort" SVG.
       expect(deltaButton).toMatchSnapshot();
@@ -608,11 +608,11 @@ describe('SubtestsResultsView Component Tests for mann-whitney-u testVersion', (
       // Sort by Significance ascending
       await user.click(significanceButton);
       expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
-        'improvement.html: +1.14%, -0.05, , 50.00%',
-        'regression.html: +1.14%, 0.12, , 25.00%',
-        'dhtml.html: +1.14%, 0.02, , 60.00%',
+        'improvement.html: +1.14%, -0.05, Real, 50.00%',
+        'regression.html: +1.14%, 0.12, Real, 25.00%',
+        'dhtml.html: +1.14%, 0.02, Real, 60.00%',
         'tablemutation.html: +0.98%, 0.01, -, 45.00%',
-        'browser.html: +1.14%, -0.04, -, 15.00%',
+        'browser.html: +1.14%, -0.04, Noise, 15.00%',
       ]);
       expectParameterToHaveValue('sort', 'significance|asc');
 
@@ -622,11 +622,11 @@ describe('SubtestsResultsView Component Tests for mann-whitney-u testVersion', (
       });
       await user.click(effectButton);
       expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
-        'browser.html: +1.14%, -0.04, -, 15.00%',
-        'regression.html: +1.14%, 0.12, , 25.00%',
-        'dhtml.html: +1.14%, 0.02, , 60.00%',
+        'browser.html: +1.14%, -0.04, Noise, 15.00%',
+        'regression.html: +1.14%, 0.12, Real, 25.00%',
+        'dhtml.html: +1.14%, 0.02, Real, 60.00%',
         'tablemutation.html: +0.98%, 0.01, -, 45.00%',
-        'improvement.html: +1.14%, -0.05, , 50.00%',
+        'improvement.html: +1.14%, -0.05, Real, 50.00%',
       ]);
 
       // It should have the "descending" SVG.
@@ -637,11 +637,11 @@ describe('SubtestsResultsView Component Tests for mann-whitney-u testVersion', (
       // Sort by Effect Size ascending
       await user.click(effectButton);
       expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
-        'improvement.html: +1.14%, -0.05, , 50.00%',
+        'improvement.html: +1.14%, -0.05, Real, 50.00%',
         'tablemutation.html: +0.98%, 0.01, -, 45.00%',
-        'dhtml.html: +1.14%, 0.02, , 60.00%',
-        'regression.html: +1.14%, 0.12, , 25.00%',
-        'browser.html: +1.14%, -0.04, -, 15.00%',
+        'dhtml.html: +1.14%, 0.02, Real, 60.00%',
+        'regression.html: +1.14%, 0.12, Real, 25.00%',
+        'browser.html: +1.14%, -0.04, Noise, 15.00%',
       ]);
       expectParameterToHaveValue('sort', 'effects|asc');
     });
@@ -651,10 +651,10 @@ describe('SubtestsResultsView Component Tests for mann-whitney-u testVersion', (
       await screen.findByText('dhtml.html');
       expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
         'tablemutation.html: +0.98%, 0.01, -, 45.00%',
-        'dhtml.html: +1.14%, 0.02, , 60.00%',
-        'browser.html: +1.14%, -0.04, -, 15.00%',
-        'improvement.html: +1.14%, -0.05, , 50.00%',
-        'regression.html: +1.14%, 0.12, , 25.00%',
+        'dhtml.html: +1.14%, 0.02, Real, 60.00%',
+        'browser.html: +1.14%, -0.04, Noise, 15.00%',
+        'improvement.html: +1.14%, -0.05, Real, 50.00%',
+        'regression.html: +1.14%, 0.12, Real, 25.00%',
       ]);
       // It should have the "ascending" SVG.
       expect(screen.getByRole('button', { name: /CD/ })).toMatchSnapshot();
@@ -664,10 +664,10 @@ describe('SubtestsResultsView Component Tests for mann-whitney-u testVersion', (
       await setupForSorting({ extraParameters: 'sort=delta' });
       await screen.findByText('dhtml.html');
       expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
-        'regression.html: +1.14%, 0.12, , 25.00%',
-        'improvement.html: +1.14%, -0.05, , 50.00%',
-        'browser.html: +1.14%, -0.04, -, 15.00%',
-        'dhtml.html: +1.14%, 0.02, , 60.00%',
+        'regression.html: +1.14%, 0.12, Real, 25.00%',
+        'improvement.html: +1.14%, -0.05, Real, 50.00%',
+        'browser.html: +1.14%, -0.04, Noise, 15.00%',
+        'dhtml.html: +1.14%, 0.02, Real, 60.00%',
         'tablemutation.html: +0.98%, 0.01, -, 45.00%',
       ]);
       // It should have the "descending" SVG.
@@ -677,10 +677,10 @@ describe('SubtestsResultsView Component Tests for mann-whitney-u testVersion', (
     it('initializes the sort from the URL at load time for a descending sort', async () => {
       await setupForSorting({ extraParameters: 'sort=delta|desc' });
       expect(summarizeVisibleRows('mann-whitney-u', true)).toEqual([
-        'regression.html: +1.14%, 0.12, , 25.00%',
-        'improvement.html: +1.14%, -0.05, , 50.00%',
-        'browser.html: +1.14%, -0.04, -, 15.00%',
-        'dhtml.html: +1.14%, 0.02, , 60.00%',
+        'regression.html: +1.14%, 0.12, Real, 25.00%',
+        'improvement.html: +1.14%, -0.05, Real, 50.00%',
+        'browser.html: +1.14%, -0.04, Noise, 15.00%',
+        'dhtml.html: +1.14%, 0.02, Real, 60.00%',
         'tablemutation.html: +0.98%, 0.01, -, 45.00%',
       ]);
       // It should have the "descending" SVG.
diff --git a/src/__tests__/CompareResults/SubtestsRevisionRow.test.tsx b/src/__tests__/CompareResults/SubtestsRevisionRow.test.tsx
index f3f3fe330..1b328e56a 100644
--- a/src/__tests__/CompareResults/SubtestsRevisionRow.test.tsx
+++ b/src/__tests__/CompareResults/SubtestsRevisionRow.test.tsx
@@ -199,7 +199,7 @@ describe('SubtestsRevisionRow Component', () => {
     expect(effects).toHaveTextContent('60.00%');
 
     const significanceCell = roles[8];
-    expect(significanceCell?.querySelector('svg')).not.toBeNull();
+    expect(significanceCell).toHaveTextContent('Real');
 
     const cliffs_delta = roles[6]?.childNodes[1];
     expect(cliffs_delta).toHaveTextContent('0.02');
@@ -218,7 +218,7 @@ describe('SubtestsRevisionRow Component', () => {
     );
 
     const roles = await screen.findAllByRole('cell');
-    const status = roles[5]?.childNodes[0];
+    const status = roles[5]?.querySelector('.status-hint');
     expect(status).toHaveTextContent('Regression');
     expect(status).toHaveClass('status-hint-regression');
   });
@@ -236,7 +236,7 @@ describe('SubtestsRevisionRow Component', () => {
     );
 
     const roles1 = await screen.findAllByRole('cell');
-    const status1 = roles1[5]?.childNodes[0];
+    const status1 = roles1[5]?.querySelector('.status-hint');
     expect(status1).toHaveTextContent('Improvement');
     expect(status1).toHaveClass('status-hint-improvement');
   });
diff --git a/src/__tests__/CompareResults/__snapshots__/OverTimeResultsView.test.tsx.snap b/src/__tests__/CompareResults/__snapshots__/OverTimeResultsView.test.tsx.snap
index cbda59375..128181692 100644
--- a/src/__tests__/CompareResults/__snapshots__/OverTimeResultsView.test.tsx.snap
+++ b/src/__tests__/CompareResults/__snapshots__/OverTimeResultsView.test.tsx.snap
@@ -413,7 +413,7 @@ exports[`Results View The table should match snapshot and other elements should
       </div>
     </div>
     <div
-      class="f11g8g7n f1l733lh"
+      class="fm2goje f1l733lh"
       data-testid="table-header"
       role="row"
     >
@@ -547,22 +547,21 @@ exports[`Results View The table should match snapshot and other elements should
         </button>
       </div>
       <div
-        class="cell difference-size-header"
+        class="cell significance-header"
         role="columnheader"
       >
-        <span
-          aria-label="Shows how big the difference between Base and New is, in plain words: negligible (barely any), small, medium, or large. It comes from how much the Base and New results overlap — the less they overlap, the bigger the difference."
-          class="MuiBox-root css-1tkq7a4"
-          data-mui-internal-clone-element="true"
+        <div
+          class="MuiButtonGroup-root MuiButtonGroup-contained MuiButtonGroup-horizontal MuiButtonGroup-disableElevation MuiButtonGroup-colorTableHeaderButton css-1fyroww-MuiButtonGroup-root"
+          role="group"
         >
           <button
-            aria-label="Difference Size (Click to sort by this column)"
-            class="MuiButtonBase-root MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation css-7upxw3-MuiButtonBase-root-MuiButton-root"
+            aria-label="Significance (Click to sort by this column)"
+            class="MuiButtonBase-root MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButtonGroup-firstButton css-17eldkb-MuiButtonBase-root-MuiButton-root"
             tabindex="0"
             type="button"
           >
             <svg
-              class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-10d4m26-MuiSvgIcon-root"
+              class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
               data-testid="SwapVertIcon"
               focusable="false"
               role="img"
@@ -572,12 +571,40 @@ exports[`Results View The table should match snapshot and other elements should
                 d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
               />
               <title>
-                Not sorted by Difference Size
+                Not sorted by Significance
               </title>
             </svg>
-            Difference Size
           </button>
-        </span>
+          <button
+            aria-haspopup="true"
+            aria-label="Significance (Click to filter values)"
+            class="MuiButtonBase-root MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation MuiButtonGroup-lastButton css-l81dbu-MuiButtonBase-root-MuiButton-root"
+            data-mui-internal-clone-element="true"
+            tabindex="0"
+            type="button"
+          >
+            Significance
+            <div
+              aria-label="2 items selected"
+              class="MuiBox-root css-18uhbjh"
+            >
+              (
+              2
+              )
+            </div>
+            <svg
+              aria-hidden="true"
+              class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-120he73-MuiSvgIcon-root"
+              data-testid="KeyboardArrowDownIcon"
+              focusable="false"
+              viewBox="0 0 24 24"
+            >
+              <path
+                d="M7.41 8.59 12 13.17l4.59-4.58L18 10l-6 6-6-6z"
+              />
+            </svg>
+          </button>
+        </div>
       </div>
       <div
         class="cell trials-header"
@@ -718,7 +745,7 @@ exports[`Results View The table should match snapshot and other elements should
               class="revision-block fw0pvlu"
             >
               <div
-                class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1eojgcr"
+                class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1b1zdsv"
                 role="row"
               >
                 <div
@@ -781,11 +808,15 @@ exports[`Results View The table should match snapshot and other elements should
                   role="cell"
                 >
                   <div
-                    class="status-hint MuiBox-root css-1dj4wrv"
-                  />
+                    class="MuiBox-root css-j0pheo"
+                  >
+                    <div
+                      class="status-hint MuiBox-root css-1dj4wrv"
+                    />
+                  </div>
                 </div>
                 <div
-                  class="difference-size cell"
+                  class="significance cell"
                   role="cell"
                 >
                   -
@@ -881,7 +912,7 @@ exports[`Results View The table should match snapshot and other elements should
                     data-testid="expand-revision-button"
                   >
                     <button
-                      aria-controls="_r_10_"
+                      aria-controls="_r_11_"
                       aria-expanded="false"
                       class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                       tabindex="0"
@@ -904,7 +935,7 @@ exports[`Results View The table should match snapshot and other elements should
                 </div>
               </div>
               <div
-                class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1eojgcr"
+                class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1b1zdsv"
                 role="row"
               >
                 <div
@@ -968,11 +999,15 @@ exports[`Results View The table should match snapshot and other elements should
                   role="cell"
                 >
                   <div
-                    class="status-hint MuiBox-root css-1dj4wrv"
-                  />
+                    class="MuiBox-root css-j0pheo"
+                  >
+                    <div
+                      class="status-hint MuiBox-root css-1dj4wrv"
+                    />
+                  </div>
                 </div>
                 <div
-                  class="difference-size cell"
+                  class="significance cell"
                   role="cell"
                 >
                   -
@@ -1068,7 +1103,7 @@ exports[`Results View The table should match snapshot and other elements should
                     data-testid="expand-revision-button"
                   >
                     <button
-                      aria-controls="_r_17_"
+                      aria-controls="_r_18_"
                       aria-expanded="false"
                       class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                       tabindex="0"
@@ -1091,7 +1126,7 @@ exports[`Results View The table should match snapshot and other elements should
                 </div>
               </div>
               <div
-                class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1eojgcr"
+                class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1b1zdsv"
                 role="row"
               >
                 <div
@@ -1155,11 +1190,15 @@ exports[`Results View The table should match snapshot and other elements should
                   role="cell"
                 >
                   <div
-                    class="status-hint MuiBox-root css-1dj4wrv"
-                  />
+                    class="MuiBox-root css-j0pheo"
+                  >
+                    <div
+                      class="status-hint MuiBox-root css-1dj4wrv"
+                    />
+                  </div>
                 </div>
                 <div
-                  class="difference-size cell"
+                  class="significance cell"
                   role="cell"
                 >
                   -
@@ -1255,7 +1294,7 @@ exports[`Results View The table should match snapshot and other elements should
                     data-testid="expand-revision-button"
                   >
                     <button
-                      aria-controls="_r_1e_"
+                      aria-controls="_r_1f_"
                       aria-expanded="false"
                       class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                       tabindex="0"
@@ -1278,7 +1317,7 @@ exports[`Results View The table should match snapshot and other elements should
                 </div>
               </div>
               <div
-                class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1eojgcr"
+                class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1b1zdsv"
                 role="row"
               >
                 <div
@@ -1342,11 +1381,15 @@ exports[`Results View The table should match snapshot and other elements should
                   role="cell"
                 >
                   <div
-                    class="status-hint MuiBox-root css-1dj4wrv"
-                  />
+                    class="MuiBox-root css-j0pheo"
+                  >
+                    <div
+                      class="status-hint MuiBox-root css-1dj4wrv"
+                    />
+                  </div>
                 </div>
                 <div
-                  class="difference-size cell"
+                  class="significance cell"
                   role="cell"
                 >
                   -
@@ -1442,7 +1485,7 @@ exports[`Results View The table should match snapshot and other elements should
                     data-testid="expand-revision-button"
                   >
                     <button
-                      aria-controls="_r_1l_"
+                      aria-controls="_r_1m_"
                       aria-expanded="false"
                       class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                       tabindex="0"
diff --git a/src/__tests__/CompareResults/__snapshots__/ResultsTable.test.tsx.snap b/src/__tests__/CompareResults/__snapshots__/ResultsTable.test.tsx.snap
index a95a77860..21132c962 100644
--- a/src/__tests__/CompareResults/__snapshots__/ResultsTable.test.tsx.snap
+++ b/src/__tests__/CompareResults/__snapshots__/ResultsTable.test.tsx.snap
@@ -1055,20 +1055,20 @@ exports[`Results Table Should match snapshot 1`] = `
                     <strong>
                       No change
                     </strong>
-                    .
+                     — with the size of the difference (negligible, small, medium, or large) shown beneath it.
                   </li>
                   <li>
                     <strong>
-                      Difference Size
+                      Sig
                     </strong>
-                     says how big the difference is: negligible, small, medium, or large.
+                     shows whether the difference is statistically significant (an arrow) or not (a dash).
                   </li>
                   <li>
                     Tick 
                     <strong>
                       Advanced columns
                     </strong>
-                     to add the expert stats (Cliff's Delta, CLES, Significance).
+                     to add the expert stats (Cliff's Delta and CLES).
                   </li>
                 </ul>
               </div>
@@ -1508,7 +1508,7 @@ exports[`Results Table Should match snapshot 1`] = `
                   </div>
                 </div>
                 <div
-                  class="f11g8g7n f1l733lh"
+                  class="fm2goje f1l733lh"
                   data-testid="table-header"
                   role="row"
                 >
@@ -1642,22 +1642,21 @@ exports[`Results Table Should match snapshot 1`] = `
                     </button>
                   </div>
                   <div
-                    class="cell difference-size-header"
+                    class="cell significance-header"
                     role="columnheader"
                   >
-                    <span
-                      aria-label="Shows how big the difference between Base and New is, in plain words: negligible (barely any), small, medium, or large. It comes from how much the Base and New results overlap — the less they overlap, the bigger the difference."
-                      class="MuiBox-root css-1tkq7a4"
-                      data-mui-internal-clone-element="true"
+                    <div
+                      class="MuiButtonGroup-root MuiButtonGroup-contained MuiButtonGroup-horizontal MuiButtonGroup-disableElevation MuiButtonGroup-colorTableHeaderButton css-1fyroww-MuiButtonGroup-root"
+                      role="group"
                     >
                       <button
-                        aria-label="Difference Size (Click to sort by this column)"
-                        class="MuiButtonBase-root MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation css-7upxw3-MuiButtonBase-root-MuiButton-root"
+                        aria-label="Significance (Click to sort by this column)"
+                        class="MuiButtonBase-root MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButtonGroup-firstButton css-17eldkb-MuiButtonBase-root-MuiButton-root"
                         tabindex="0"
                         type="button"
                       >
                         <svg
-                          class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-10d4m26-MuiSvgIcon-root"
+                          class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
                           data-testid="SwapVertIcon"
                           focusable="false"
                           role="img"
@@ -1667,12 +1666,40 @@ exports[`Results Table Should match snapshot 1`] = `
                             d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
                           />
                           <title>
-                            Not sorted by Difference Size
+                            Not sorted by Significance
                           </title>
                         </svg>
-                        Difference Size
                       </button>
-                    </span>
+                      <button
+                        aria-haspopup="true"
+                        aria-label="Significance (Click to filter values)"
+                        class="MuiButtonBase-root MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation MuiButtonGroup-lastButton css-l81dbu-MuiButtonBase-root-MuiButton-root"
+                        data-mui-internal-clone-element="true"
+                        tabindex="0"
+                        type="button"
+                      >
+                        Significance
+                        <div
+                          aria-label="2 items selected"
+                          class="MuiBox-root css-18uhbjh"
+                        >
+                          (
+                          2
+                          )
+                        </div>
+                        <svg
+                          aria-hidden="true"
+                          class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-120he73-MuiSvgIcon-root"
+                          data-testid="KeyboardArrowDownIcon"
+                          focusable="false"
+                          viewBox="0 0 24 24"
+                        >
+                          <path
+                            d="M7.41 8.59 12 13.17l4.59-4.58L18 10l-6 6-6-6z"
+                          />
+                        </svg>
+                      </button>
+                    </div>
                   </div>
                   <div
                     class="cell trials-header"
@@ -1813,7 +1840,7 @@ exports[`Results Table Should match snapshot 1`] = `
                           class="revision-block fw0pvlu"
                         >
                           <div
-                            class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1eojgcr"
+                            class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1b1zdsv"
                             role="row"
                           >
                             <div
@@ -1876,11 +1903,15 @@ exports[`Results Table Should match snapshot 1`] = `
                               role="cell"
                             >
                               <div
-                                class="status-hint MuiBox-root css-1dj4wrv"
-                              />
+                                class="MuiBox-root css-j0pheo"
+                              >
+                                <div
+                                  class="status-hint MuiBox-root css-1dj4wrv"
+                                />
+                              </div>
                             </div>
                             <div
-                              class="difference-size cell"
+                              class="significance cell"
                               role="cell"
                             >
                               -
@@ -1976,7 +2007,7 @@ exports[`Results Table Should match snapshot 1`] = `
                                 data-testid="expand-revision-button"
                               >
                                 <button
-                                  aria-controls="_r_1a_"
+                                  aria-controls="_r_1b_"
                                   aria-expanded="false"
                                   class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                                   tabindex="0"
@@ -1999,7 +2030,7 @@ exports[`Results Table Should match snapshot 1`] = `
                             </div>
                           </div>
                           <div
-                            class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1eojgcr"
+                            class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1b1zdsv"
                             role="row"
                           >
                             <div
@@ -2063,11 +2094,15 @@ exports[`Results Table Should match snapshot 1`] = `
                               role="cell"
                             >
                               <div
-                                class="status-hint MuiBox-root css-1dj4wrv"
-                              />
+                                class="MuiBox-root css-j0pheo"
+                              >
+                                <div
+                                  class="status-hint MuiBox-root css-1dj4wrv"
+                                />
+                              </div>
                             </div>
                             <div
-                              class="difference-size cell"
+                              class="significance cell"
                               role="cell"
                             >
                               -
@@ -2163,7 +2198,7 @@ exports[`Results Table Should match snapshot 1`] = `
                                 data-testid="expand-revision-button"
                               >
                                 <button
-                                  aria-controls="_r_1h_"
+                                  aria-controls="_r_1i_"
                                   aria-expanded="false"
                                   class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                                   tabindex="0"
@@ -2186,7 +2221,7 @@ exports[`Results Table Should match snapshot 1`] = `
                             </div>
                           </div>
                           <div
-                            class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1eojgcr"
+                            class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1b1zdsv"
                             role="row"
                           >
                             <div
@@ -2250,11 +2285,15 @@ exports[`Results Table Should match snapshot 1`] = `
                               role="cell"
                             >
                               <div
-                                class="status-hint MuiBox-root css-1dj4wrv"
-                              />
+                                class="MuiBox-root css-j0pheo"
+                              >
+                                <div
+                                  class="status-hint MuiBox-root css-1dj4wrv"
+                                />
+                              </div>
                             </div>
                             <div
-                              class="difference-size cell"
+                              class="significance cell"
                               role="cell"
                             >
                               -
@@ -2350,7 +2389,7 @@ exports[`Results Table Should match snapshot 1`] = `
                                 data-testid="expand-revision-button"
                               >
                                 <button
-                                  aria-controls="_r_1o_"
+                                  aria-controls="_r_1p_"
                                   aria-expanded="false"
                                   class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                                   tabindex="0"
@@ -2460,7 +2499,7 @@ exports[`Results Table Should match snapshot 1`] = `
                           class="revision-block fw0pvlu"
                         >
                           <div
-                            class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1eojgcr"
+                            class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1b1zdsv"
                             role="row"
                           >
                             <div
@@ -2524,11 +2563,15 @@ exports[`Results Table Should match snapshot 1`] = `
                               role="cell"
                             >
                               <div
-                                class="status-hint MuiBox-root css-1dj4wrv"
-                              />
+                                class="MuiBox-root css-j0pheo"
+                              >
+                                <div
+                                  class="status-hint MuiBox-root css-1dj4wrv"
+                                />
+                              </div>
                             </div>
                             <div
-                              class="difference-size cell"
+                              class="significance cell"
                               role="cell"
                             >
                               -
@@ -2624,7 +2667,7 @@ exports[`Results Table Should match snapshot 1`] = `
                                 data-testid="expand-revision-button"
                               >
                                 <button
-                                  aria-controls="_r_20_"
+                                  aria-controls="_r_21_"
                                   aria-expanded="false"
                                   class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                                   tabindex="0"
@@ -3274,7 +3317,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                                 autocapitalize="none"
                                 autocomplete="off"
                                 class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-16cokj7-MuiInputBase-input-MuiOutlinedInput-input"
-                                id="_r_qv_"
+                                id="_r_r1_"
                                 placeholder="Search by revision ID or author email"
                                 role="combobox"
                                 spellcheck="false"
@@ -3601,7 +3644,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                                 autocapitalize="none"
                                 autocomplete="off"
                                 class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-16cokj7-MuiInputBase-input-MuiOutlinedInput-input"
-                                id="_r_r7_"
+                                id="_r_r9_"
                                 placeholder="Search by revision ID or author email"
                                 role="combobox"
                                 spellcheck="false"
@@ -3988,20 +4031,20 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                     <strong>
                       No change
                     </strong>
-                    .
+                     — with the size of the difference (negligible, small, medium, or large) shown beneath it.
                   </li>
                   <li>
                     <strong>
-                      Difference Size
+                      Sig
                     </strong>
-                     says how big the difference is: negligible, small, medium, or large.
+                     shows whether the difference is statistically significant (an arrow) or not (a dash).
                   </li>
                   <li>
                     Tick 
                     <strong>
                       Advanced columns
                     </strong>
-                     to add the expert stats (Cliff's Delta, CLES, Significance).
+                     to add the expert stats (Cliff's Delta and CLES).
                   </li>
                 </ul>
               </div>
@@ -4080,7 +4123,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                             aria-invalid="false"
                             aria-label="Search by title, platform, revision or options"
                             class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd css-3v3un6-MuiInputBase-input-MuiOutlinedInput-input"
-                            id="_r_rg_"
+                            id="_r_ri_"
                             placeholder="Filter results"
                             type="search"
                             value=""
@@ -4901,20 +4944,29 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                               role="cell"
                             >
                               <div
-                                class="status-hint status-hint-regression MuiBox-root css-ucc9gw"
+                                class="MuiBox-root css-j0pheo"
                               >
-                                <svg
-                                  aria-hidden="true"
-                                  class="MuiSvgIcon-root MuiSvgIcon-colorError MuiSvgIcon-fontSizeMedium css-r7hube-MuiSvgIcon-root"
-                                  data-testid="ThumbDownIcon"
-                                  focusable="false"
-                                  viewBox="0 0 24 24"
+                                <div
+                                  class="status-hint status-hint-regression MuiBox-root css-ucc9gw"
                                 >
-                                  <path
-                                    d="M15 3H6c-.83 0-1.54.5-1.84 1.22l-3.02 7.05c-.09.23-.14.47-.14.73v2c0 1.1.9 2 2 2h6.31l-.95 4.57-.03.32c0 .41.17.79.44 1.06L9.83 23l6.59-6.59c.36-.36.58-.86.58-1.41V5c0-1.1-.9-2-2-2m4 0v12h4V3z"
-                                  />
-                                </svg>
-                                Regression
+                                  <svg
+                                    aria-hidden="true"
+                                    class="MuiSvgIcon-root MuiSvgIcon-colorError MuiSvgIcon-fontSizeMedium css-r7hube-MuiSvgIcon-root"
+                                    data-testid="ThumbDownIcon"
+                                    focusable="false"
+                                    viewBox="0 0 24 24"
+                                  >
+                                    <path
+                                      d="M15 3H6c-.83 0-1.54.5-1.84 1.22l-3.02 7.05c-.09.23-.14.47-.14.73v2c0 1.1.9 2 2 2h6.31l-.95 4.57-.03.32c0 .41.17.79.44 1.06L9.83 23l6.59-6.59c.36-.36.58-.86.58-1.41V5c0-1.1-.9-2-2-2m4 0v12h4V3z"
+                                    />
+                                  </svg>
+                                  Regression
+                                </div>
+                                <span
+                                  class="difference-size MuiBox-root css-kmk2bl"
+                                >
+                                  Negligible
+                                </span>
                               </div>
                             </div>
                             <div
@@ -4933,7 +4985,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                               class="significance cell"
                               role="cell"
                             >
-                              -
+                              Noise
                             </div>
                             <div
                               class="total-runs cell"
@@ -5026,7 +5078,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                                 data-testid="expand-revision-button"
                               >
                                 <button
-                                  aria-controls="_r_sa_"
+                                  aria-controls="_r_sc_"
                                   aria-expanded="false"
                                   class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                                   tabindex="0"
@@ -5113,20 +5165,24 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                               role="cell"
                             >
                               <div
-                                class="status-hint status-hint-improvement MuiBox-root css-1h9ue86"
+                                class="MuiBox-root css-j0pheo"
                               >
-                                <svg
-                                  aria-hidden="true"
-                                  class="MuiSvgIcon-root MuiSvgIcon-colorSuccess MuiSvgIcon-fontSizeMedium css-p35293-MuiSvgIcon-root"
-                                  data-testid="ThumbUpIcon"
-                                  focusable="false"
-                                  viewBox="0 0 24 24"
+                                <div
+                                  class="status-hint status-hint-improvement MuiBox-root css-1h9ue86"
                                 >
-                                  <path
-                                    d="M1 21h4V9H1zm22-11c0-1.1-.9-2-2-2h-6.31l.95-4.57.03-.32c0-.41-.17-.79-.44-1.06L14.17 1 7.59 7.59C7.22 7.95 7 8.45 7 9v10c0 1.1.9 2 2 2h9c.83 0 1.54-.5 1.84-1.22l3.02-7.05c.09-.23.14-.47.14-.73z"
-                                  />
-                                </svg>
-                                Improvement
+                                  <svg
+                                    aria-hidden="true"
+                                    class="MuiSvgIcon-root MuiSvgIcon-colorSuccess MuiSvgIcon-fontSizeMedium css-p35293-MuiSvgIcon-root"
+                                    data-testid="ThumbUpIcon"
+                                    focusable="false"
+                                    viewBox="0 0 24 24"
+                                  >
+                                    <path
+                                      d="M1 21h4V9H1zm22-11c0-1.1-.9-2-2-2h-6.31l.95-4.57.03-.32c0-.41-.17-.79-.44-1.06L14.17 1 7.59 7.59C7.22 7.95 7 8.45 7 9v10c0 1.1.9 2 2 2h9c.83 0 1.54-.5 1.84-1.22l3.02-7.05c.09-.23.14-.47.14-.73z"
+                                    />
+                                  </svg>
+                                  Improvement
+                                </div>
                               </div>
                             </div>
                             <div
@@ -5145,7 +5201,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                               class="significance cell"
                               role="cell"
                             >
-                              -
+                              Noise
                             </div>
                             <div
                               class="total-runs cell"
@@ -5238,7 +5294,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                                 data-testid="expand-revision-button"
                               >
                                 <button
-                                  aria-controls="_r_sh_"
+                                  aria-controls="_r_sj_"
                                   aria-expanded="false"
                                   class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                                   tabindex="0"
@@ -5325,8 +5381,12 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                               role="cell"
                             >
                               <div
-                                class="status-hint MuiBox-root css-1dj4wrv"
-                              />
+                                class="MuiBox-root css-j0pheo"
+                              >
+                                <div
+                                  class="status-hint MuiBox-root css-1dj4wrv"
+                                />
+                              </div>
                             </div>
                             <div
                               class="delta cell"
@@ -5344,20 +5404,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                               class="significance cell"
                               role="cell"
                             >
-                              <svg
-                                aria-hidden="true"
-                                class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
-                                data-testid="KeyboardDoubleArrowUpIcon"
-                                focusable="false"
-                                viewBox="0 0 24 24"
-                              >
-                                <path
-                                  d="M6 17.59 7.41 19 12 14.42 16.59 19 18 17.59l-6-6z"
-                                />
-                                <path
-                                  d="m6 11 1.41 1.41L12 7.83l4.59 4.58L18 11l-6-6z"
-                                />
-                              </svg>
+                              Real
                             </div>
                             <div
                               class="total-runs cell"
@@ -5450,7 +5497,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                                 data-testid="expand-revision-button"
                               >
                                 <button
-                                  aria-controls="_r_so_"
+                                  aria-controls="_r_sq_"
                                   aria-expanded="false"
                                   class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                                   tabindex="0"
@@ -5620,8 +5667,12 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                               role="cell"
                             >
                               <div
-                                class="status-hint MuiBox-root css-1dj4wrv"
-                              />
+                                class="MuiBox-root css-j0pheo"
+                              >
+                                <div
+                                  class="status-hint MuiBox-root css-1dj4wrv"
+                                />
+                              </div>
                             </div>
                             <div
                               class="delta cell"
@@ -5639,20 +5690,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                               class="significance cell"
                               role="cell"
                             >
-                              <svg
-                                aria-hidden="true"
-                                class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
-                                data-testid="KeyboardDoubleArrowUpIcon"
-                                focusable="false"
-                                viewBox="0 0 24 24"
-                              >
-                                <path
-                                  d="M6 17.59 7.41 19 12 14.42 16.59 19 18 17.59l-6-6z"
-                                />
-                                <path
-                                  d="m6 11 1.41 1.41L12 7.83l4.59 4.58L18 11l-6-6z"
-                                />
-                              </svg>
+                              Real
                             </div>
                             <div
                               class="total-runs cell"
@@ -5745,7 +5783,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                                 data-testid="expand-revision-button"
                               >
                                 <button
-                                  aria-controls="_r_t0_"
+                                  aria-controls="_r_t2_"
                                   aria-expanded="false"
                                   class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                                   tabindex="0"
@@ -6075,26 +6113,26 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
 [
   "a11yr dhtml.html opt e10s fission stylo webrender",
   "  rev: spam",
-  "  - Linux 18.04, +1.85%, Regression, -, -, 45.00 %",
-  "  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %",
-  "  - Windows 10, -, , -, , 100.00 %",
-  "  - Windows 10, -2.40%, , -, , 50.00 %",
+  "  - Linux 18.04, +1.85%, Regression, -, Noise, 45.00 %",
+  "  - macOS 10.15, +1.08%, Improvement, 0.1, Noise, 25.00 %",
+  "  - Windows 10, -, , -, Real, 100.00 %",
+  "  - Windows 10, -2.40%, , -, Real, 50.00 %",
   "  rev: tictactoe",
-  "  - Linux 18.04, +1.85%, Regression, 0.8, -, 44.00 %",
-  "  - macOS 10.15, +1.08%, Improvement, 0.9, -, 24.00 %",
-  "  - Windows 10, -, , 0.8, , 99.00 %",
-  "  - Windows 10, -2.40%, , 0.8, , 49.00 %",
+  "  - Linux 18.04, +1.85%, Regression, 0.8, Noise, 44.00 %",
+  "  - macOS 10.15, +1.08%, Improvement, 0.9, Noise, 24.00 %",
+  "  - Windows 10, -, , 0.8, Real, 99.00 %",
+  "  - Windows 10, -2.40%, , 0.8, Real, 49.00 %",
   "a11yr aria.html opt e10s fission stylo webrender",
   "  rev: spam",
-  "  - Linux 18.04, +1.85%, Regression, 1.2, -, 44.00 %",
-  "  - macOS 10.15, +1.08%, Improvement, 1.3, -, 24.00 %",
-  "  - Windows 10, -, , 1.2, , 99.00 %",
-  "  - Windows 10, -2.40%, , 1.2, , 49.00 %",
+  "  - Linux 18.04, +1.85%, Regression, 1.2, Noise, 44.00 %",
+  "  - macOS 10.15, +1.08%, Improvement, 1.3, Noise, 24.00 %",
+  "  - Windows 10, -, , 1.2, Real, 99.00 %",
+  "  - Windows 10, -2.40%, , 1.2, Real, 49.00 %",
   "  rev: tictactoe",
-  "  - Linux 18.04, +1.85%, Regression, 2, -, 43.00 %",
-  "  - macOS 10.15, +1.08%, Improvement, 2.1, -, 23.00 %",
-  "  - Windows 10, -, , 2, , 98.00 %",
-  "  - Windows 10, -2.40%, , 2, , 48.00 %",
+  "  - Linux 18.04, +1.85%, Regression, 2, Noise, 43.00 %",
+  "  - macOS 10.15, +1.08%, Improvement, 2.1, Noise, 23.00 %",
+  "  - Windows 10, -, , 2, Real, 98.00 %",
+  "  - Windows 10, -2.40%, , 2, Real, 48.00 %",
 ]
 `;
 
@@ -6147,26 +6185,26 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
 [
   "a11yr dhtml.html opt e10s fission stylo webrender",
   "  rev: spam",
-  "  - Windows 10, -2.40%, , -, , 50.00 %",
-  "  - Windows 10, -, , -, , 100.00 %",
-  "  - macOS 10.15, +1.08%, Improvement, 0.1, -, 25.00 %",
-  "  - Linux 18.04, +1.85%, Regression, -, -, 45.00 %",
+  "  - Windows 10, -2.40%, , -, Real, 50.00 %",
+  "  - Windows 10, -, , -, Real, 100.00 %",
+  "  - macOS 10.15, +1.08%, Improvement, 0.1, Noise, 25.00 %",
+  "  - Linux 18.04, +1.85%, Regression, -, Noise, 45.00 %",
   "  rev: tictactoe",
-  "  - Windows 10, -2.40%, , 0.8, , 49.00 %",
-  "  - Windows 10, -, , 0.8, , 99.00 %",
-  "  - macOS 10.15, +1.08%, Improvement, 0.9, -, 24.00 %",
-  "  - Linux 18.04, +1.85%, Regression, 0.8, -, 44.00 %",
+  "  - Windows 10, -2.40%, , 0.8, Real, 49.00 %",
+  "  - Windows 10, -, , 0.8, Real, 99.00 %",
+  "  - macOS 10.15, +1.08%, Improvement, 0.9, Noise, 24.00 %",
+  "  - Linux 18.04, +1.85%, Regression, 0.8, Noise, 44.00 %",
   "a11yr aria.html opt e10s fission stylo webrender",
   "  rev: spam",
-  "  - Windows 10, -2.40%, , 1.2, , 49.00 %",
-  "  - Windows 10, -, , 1.2, , 99.00 %",
-  "  - macOS 10.15, +1.08%, Improvement, 1.3, -, 24.00 %",
-  "  - Linux 18.04, +1.85%, Regression, 1.2, -, 44.00 %",
+  "  - Windows 10, -2.40%, , 1.2, Real, 49.00 %",
+  "  - Windows 10, -, , 1.2, Real, 99.00 %",
+  "  - macOS 10.15, +1.08%, Improvement, 1.3, Noise, 24.00 %",
+  "  - Linux 18.04, +1.85%, Regression, 1.2, Noise, 44.00 %",
   "  rev: tictactoe",
-  "  - Windows 10, -2.40%, , 2, , 48.00 %",
-  "  - Windows 10, -, , 2, , 98.00 %",
-  "  - macOS 10.15, +1.08%, Improvement, 2.1, -, 23.00 %",
-  "  - Linux 18.04, +1.85%, Regression, 2, -, 43.00 %",
+  "  - Windows 10, -2.40%, , 2, Real, 48.00 %",
+  "  - Windows 10, -, , 2, Real, 98.00 %",
+  "  - macOS 10.15, +1.08%, Improvement, 2.1, Noise, 23.00 %",
+  "  - Linux 18.04, +1.85%, Regression, 2, Noise, 43.00 %",
 ]
 `;
 
@@ -6439,20 +6477,24 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
         role="cell"
       >
         <div
-          class="status-hint status-hint-improvement MuiBox-root css-1h9ue86"
+          class="MuiBox-root css-j0pheo"
         >
-          <svg
-            aria-hidden="true"
-            class="MuiSvgIcon-root MuiSvgIcon-colorSuccess MuiSvgIcon-fontSizeMedium css-p35293-MuiSvgIcon-root"
-            data-testid="ThumbUpIcon"
-            focusable="false"
-            viewBox="0 0 24 24"
+          <div
+            class="status-hint status-hint-improvement MuiBox-root css-1h9ue86"
           >
-            <path
-              d="M1 21h4V9H1zm22-11c0-1.1-.9-2-2-2h-6.31l.95-4.57.03-.32c0-.41-.17-.79-.44-1.06L14.17 1 7.59 7.59C7.22 7.95 7 8.45 7 9v10c0 1.1.9 2 2 2h9c.83 0 1.54-.5 1.84-1.22l3.02-7.05c.09-.23.14-.47.14-.73z"
-            />
-          </svg>
-          Improvement
+            <svg
+              aria-hidden="true"
+              class="MuiSvgIcon-root MuiSvgIcon-colorSuccess MuiSvgIcon-fontSizeMedium css-p35293-MuiSvgIcon-root"
+              data-testid="ThumbUpIcon"
+              focusable="false"
+              viewBox="0 0 24 24"
+            >
+              <path
+                d="M1 21h4V9H1zm22-11c0-1.1-.9-2-2-2h-6.31l.95-4.57.03-.32c0-.41-.17-.79-.44-1.06L14.17 1 7.59 7.59C7.22 7.95 7 8.45 7 9v10c0 1.1.9 2 2 2h9c.83 0 1.54-.5 1.84-1.22l3.02-7.05c.09-.23.14-.47.14-.73z"
+              />
+            </svg>
+            Improvement
+          </div>
         </div>
       </div>
       <div
@@ -6471,7 +6513,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
         class="significance cell"
         role="cell"
       >
-        -
+        Noise
       </div>
       <div
         class="total-runs cell"
@@ -6564,7 +6606,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
           data-testid="expand-revision-button"
         >
           <button
-            aria-controls="_r_104_"
+            aria-controls="_r_106_"
             aria-expanded="false"
             class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
             tabindex="0"
@@ -6690,20 +6732,24 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
         role="cell"
       >
         <div
-          class="status-hint status-hint-improvement MuiBox-root css-1h9ue86"
+          class="MuiBox-root css-j0pheo"
         >
-          <svg
-            aria-hidden="true"
-            class="MuiSvgIcon-root MuiSvgIcon-colorSuccess MuiSvgIcon-fontSizeMedium css-p35293-MuiSvgIcon-root"
-            data-testid="ThumbUpIcon"
-            focusable="false"
-            viewBox="0 0 24 24"
+          <div
+            class="status-hint status-hint-improvement MuiBox-root css-1h9ue86"
           >
-            <path
-              d="M1 21h4V9H1zm22-11c0-1.1-.9-2-2-2h-6.31l.95-4.57.03-.32c0-.41-.17-.79-.44-1.06L14.17 1 7.59 7.59C7.22 7.95 7 8.45 7 9v10c0 1.1.9 2 2 2h9c.83 0 1.54-.5 1.84-1.22l3.02-7.05c.09-.23.14-.47.14-.73z"
-            />
-          </svg>
-          Improvement
+            <svg
+              aria-hidden="true"
+              class="MuiSvgIcon-root MuiSvgIcon-colorSuccess MuiSvgIcon-fontSizeMedium css-p35293-MuiSvgIcon-root"
+              data-testid="ThumbUpIcon"
+              focusable="false"
+              viewBox="0 0 24 24"
+            >
+              <path
+                d="M1 21h4V9H1zm22-11c0-1.1-.9-2-2-2h-6.31l.95-4.57.03-.32c0-.41-.17-.79-.44-1.06L14.17 1 7.59 7.59C7.22 7.95 7 8.45 7 9v10c0 1.1.9 2 2 2h9c.83 0 1.54-.5 1.84-1.22l3.02-7.05c.09-.23.14-.47.14-.73z"
+              />
+            </svg>
+            Improvement
+          </div>
         </div>
       </div>
       <div
@@ -6722,7 +6768,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
         class="significance cell"
         role="cell"
       >
-        -
+        Noise
       </div>
       <div
         class="total-runs cell"
@@ -6815,7 +6861,7 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
           data-testid="expand-revision-button"
         >
           <button
-            aria-controls="_r_10c_"
+            aria-controls="_r_10e_"
             aria-expanded="false"
             class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
             tabindex="0"
@@ -7124,7 +7170,7 @@ exports[`Results Table should render different blocks when rendering several rev
           data-testid="expand-revision-button"
         >
           <button
-            aria-controls="_r_4r_"
+            aria-controls="_r_4t_"
             aria-expanded="false"
             class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
             tabindex="0"
@@ -7370,7 +7416,7 @@ exports[`Results Table should render different blocks when rendering several rev
           data-testid="expand-revision-button"
         >
           <button
-            aria-controls="_r_53_"
+            aria-controls="_r_55_"
             aria-expanded="false"
             class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
             tabindex="0"
diff --git a/src/__tests__/CompareResults/__snapshots__/ResultsView.test.tsx.snap b/src/__tests__/CompareResults/__snapshots__/ResultsView.test.tsx.snap
index acb4376af..8fba411cc 100644
--- a/src/__tests__/CompareResults/__snapshots__/ResultsView.test.tsx.snap
+++ b/src/__tests__/CompareResults/__snapshots__/ResultsView.test.tsx.snap
@@ -4,7 +4,7 @@ exports[`Results View Should display Base, New and Common graphs with replicates
 <section
   aria-label="Revision Row Details"
   class="MuiBox-root css-13s8wtg"
-  id="_r_bs_"
+  id="_r_c2_"
 >
   <div
     class="MuiStack-root css-1714cpj-MuiStack-root"
@@ -548,7 +548,7 @@ exports[`Results View Should display Base, New and Common graphs with tooltips 1
 <section
   aria-label="Revision Row Details"
   class="MuiBox-root css-13s8wtg"
-  id="_r_aa_"
+  id="_r_af_"
 >
   <div
     class="MuiStack-root css-1714cpj-MuiStack-root"
@@ -1566,7 +1566,7 @@ exports[`Results View The table should match snapshot and other elements should
       </div>
     </div>
     <div
-      class="f11g8g7n f1l733lh"
+      class="fm2goje f1l733lh"
       data-testid="table-header"
       role="row"
     >
@@ -1700,22 +1700,21 @@ exports[`Results View The table should match snapshot and other elements should
         </button>
       </div>
       <div
-        class="cell difference-size-header"
+        class="cell significance-header"
         role="columnheader"
       >
-        <span
-          aria-label="Shows how big the difference between Base and New is, in plain words: negligible (barely any), small, medium, or large. It comes from how much the Base and New results overlap — the less they overlap, the bigger the difference."
-          class="MuiBox-root css-1tkq7a4"
-          data-mui-internal-clone-element="true"
+        <div
+          class="MuiButtonGroup-root MuiButtonGroup-contained MuiButtonGroup-horizontal MuiButtonGroup-disableElevation MuiButtonGroup-colorTableHeaderButton css-1fyroww-MuiButtonGroup-root"
+          role="group"
         >
           <button
-            aria-label="Difference Size (Click to sort by this column)"
-            class="MuiButtonBase-root MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation css-7upxw3-MuiButtonBase-root-MuiButton-root"
+            aria-label="Significance (Click to sort by this column)"
+            class="MuiButtonBase-root MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButtonGroup-firstButton css-17eldkb-MuiButtonBase-root-MuiButton-root"
             tabindex="0"
             type="button"
           >
             <svg
-              class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-10d4m26-MuiSvgIcon-root"
+              class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
               data-testid="SwapVertIcon"
               focusable="false"
               role="img"
@@ -1725,12 +1724,40 @@ exports[`Results View The table should match snapshot and other elements should
                 d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
               />
               <title>
-                Not sorted by Difference Size
+                Not sorted by Significance
               </title>
             </svg>
-            Difference Size
           </button>
-        </span>
+          <button
+            aria-haspopup="true"
+            aria-label="Significance (Click to filter values)"
+            class="MuiButtonBase-root MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation MuiButtonGroup-lastButton css-l81dbu-MuiButtonBase-root-MuiButton-root"
+            data-mui-internal-clone-element="true"
+            tabindex="0"
+            type="button"
+          >
+            Significance
+            <div
+              aria-label="2 items selected"
+              class="MuiBox-root css-18uhbjh"
+            >
+              (
+              2
+              )
+            </div>
+            <svg
+              aria-hidden="true"
+              class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-120he73-MuiSvgIcon-root"
+              data-testid="KeyboardArrowDownIcon"
+              focusable="false"
+              viewBox="0 0 24 24"
+            >
+              <path
+                d="M7.41 8.59 12 13.17l4.59-4.58L18 10l-6 6-6-6z"
+              />
+            </svg>
+          </button>
+        </div>
       </div>
       <div
         class="cell trials-header"
@@ -1871,7 +1898,7 @@ exports[`Results View The table should match snapshot and other elements should
               class="revision-block fw0pvlu"
             >
               <div
-                class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1eojgcr"
+                class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1b1zdsv"
                 role="row"
               >
                 <div
@@ -1934,11 +1961,15 @@ exports[`Results View The table should match snapshot and other elements should
                   role="cell"
                 >
                   <div
-                    class="status-hint MuiBox-root css-1dj4wrv"
-                  />
+                    class="MuiBox-root css-j0pheo"
+                  >
+                    <div
+                      class="status-hint MuiBox-root css-1dj4wrv"
+                    />
+                  </div>
                 </div>
                 <div
-                  class="difference-size cell"
+                  class="significance cell"
                   role="cell"
                 >
                   -
@@ -2034,7 +2065,7 @@ exports[`Results View The table should match snapshot and other elements should
                     data-testid="expand-revision-button"
                   >
                     <button
-                      aria-controls="_r_1a_"
+                      aria-controls="_r_1b_"
                       aria-expanded="false"
                       class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                       tabindex="0"
@@ -2057,7 +2088,7 @@ exports[`Results View The table should match snapshot and other elements should
                 </div>
               </div>
               <div
-                class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1eojgcr"
+                class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1b1zdsv"
                 role="row"
               >
                 <div
@@ -2121,11 +2152,15 @@ exports[`Results View The table should match snapshot and other elements should
                   role="cell"
                 >
                   <div
-                    class="status-hint MuiBox-root css-1dj4wrv"
-                  />
+                    class="MuiBox-root css-j0pheo"
+                  >
+                    <div
+                      class="status-hint MuiBox-root css-1dj4wrv"
+                    />
+                  </div>
                 </div>
                 <div
-                  class="difference-size cell"
+                  class="significance cell"
                   role="cell"
                 >
                   -
@@ -2221,7 +2256,7 @@ exports[`Results View The table should match snapshot and other elements should
                     data-testid="expand-revision-button"
                   >
                     <button
-                      aria-controls="_r_1h_"
+                      aria-controls="_r_1i_"
                       aria-expanded="false"
                       class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                       tabindex="0"
@@ -2244,7 +2279,7 @@ exports[`Results View The table should match snapshot and other elements should
                 </div>
               </div>
               <div
-                class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1eojgcr"
+                class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1b1zdsv"
                 role="row"
               >
                 <div
@@ -2308,11 +2343,15 @@ exports[`Results View The table should match snapshot and other elements should
                   role="cell"
                 >
                   <div
-                    class="status-hint MuiBox-root css-1dj4wrv"
-                  />
+                    class="MuiBox-root css-j0pheo"
+                  >
+                    <div
+                      class="status-hint MuiBox-root css-1dj4wrv"
+                    />
+                  </div>
                 </div>
                 <div
-                  class="difference-size cell"
+                  class="significance cell"
                   role="cell"
                 >
                   -
@@ -2408,7 +2447,7 @@ exports[`Results View The table should match snapshot and other elements should
                     data-testid="expand-revision-button"
                   >
                     <button
-                      aria-controls="_r_1o_"
+                      aria-controls="_r_1p_"
                       aria-expanded="false"
                       class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                       tabindex="0"
@@ -2431,7 +2470,7 @@ exports[`Results View The table should match snapshot and other elements should
                 </div>
               </div>
               <div
-                class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1eojgcr"
+                class="revisionRow f1wmgkbg f1dlt78d MuiBox-root css-1b1zdsv"
                 role="row"
               >
                 <div
@@ -2495,11 +2534,15 @@ exports[`Results View The table should match snapshot and other elements should
                   role="cell"
                 >
                   <div
-                    class="status-hint MuiBox-root css-1dj4wrv"
-                  />
+                    class="MuiBox-root css-j0pheo"
+                  >
+                    <div
+                      class="status-hint MuiBox-root css-1dj4wrv"
+                    />
+                  </div>
                 </div>
                 <div
-                  class="difference-size cell"
+                  class="significance cell"
                   role="cell"
                 >
                   -
@@ -2595,7 +2638,7 @@ exports[`Results View The table should match snapshot and other elements should
                     data-testid="expand-revision-button"
                   >
                     <button
-                      aria-controls="_r_1v_"
+                      aria-controls="_r_20_"
                       aria-expanded="false"
                       class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                       tabindex="0"
diff --git a/src/__tests__/CompareResults/__snapshots__/SubtestsResultsView.test.tsx.snap b/src/__tests__/CompareResults/__snapshots__/SubtestsResultsView.test.tsx.snap
index f46476d51..6c9ad72be 100644
--- a/src/__tests__/CompareResults/__snapshots__/SubtestsResultsView.test.tsx.snap
+++ b/src/__tests__/CompareResults/__snapshots__/SubtestsResultsView.test.tsx.snap
@@ -744,7 +744,7 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                           aria-invalid="false"
                           aria-label="Search by title"
                           class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd css-3v3un6-MuiInputBase-input-MuiOutlinedInput-input"
-                          id="_r_i_"
+                          id="_r_j_"
                           placeholder="Filter results"
                           type="search"
                           value=""
@@ -875,7 +875,7 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
               role="table"
             >
               <div
-                class="fws74y3 f1l733lh"
+                class="f3v5asi f1l733lh"
                 data-testid="table-header"
                 role="row"
               >
@@ -1002,22 +1002,21 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                   </button>
                 </div>
                 <div
-                  class="cell difference-size-header"
+                  class="cell significance-header"
                   role="columnheader"
                 >
-                  <span
-                    aria-label="Shows how big the difference between Base and New is, in plain words: negligible (barely any), small, medium, or large. It comes from how much the Base and New results overlap — the less they overlap, the bigger the difference."
-                    class="MuiBox-root css-1tkq7a4"
-                    data-mui-internal-clone-element="true"
+                  <div
+                    class="MuiButtonGroup-root MuiButtonGroup-contained MuiButtonGroup-horizontal MuiButtonGroup-disableElevation MuiButtonGroup-colorTableHeaderButton css-1fyroww-MuiButtonGroup-root"
+                    role="group"
                   >
                     <button
-                      aria-label="Difference Size (Click to sort by this column)"
-                      class="MuiButtonBase-root MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation css-7upxw3-MuiButtonBase-root-MuiButton-root"
+                      aria-label="Significance (Click to sort by this column)"
+                      class="MuiButtonBase-root MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButtonGroup-firstButton css-17eldkb-MuiButtonBase-root-MuiButton-root"
                       tabindex="0"
                       type="button"
                     >
                       <svg
-                        class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-10d4m26-MuiSvgIcon-root"
+                        class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
                         data-testid="SwapVertIcon"
                         focusable="false"
                         role="img"
@@ -1027,12 +1026,40 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                           d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
                         />
                         <title>
-                          Not sorted by Difference Size
+                          Not sorted by Significance
                         </title>
                       </svg>
-                      Difference Size
                     </button>
-                  </span>
+                    <button
+                      aria-haspopup="true"
+                      aria-label="Significance (Click to filter values)"
+                      class="MuiButtonBase-root MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation MuiButtonGroup-lastButton css-l81dbu-MuiButtonBase-root-MuiButton-root"
+                      data-mui-internal-clone-element="true"
+                      tabindex="0"
+                      type="button"
+                    >
+                      Significance
+                      <div
+                        aria-label="2 items selected"
+                        class="MuiBox-root css-18uhbjh"
+                      >
+                        (
+                        2
+                        )
+                      </div>
+                      <svg
+                        aria-hidden="true"
+                        class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-120he73-MuiSvgIcon-root"
+                        data-testid="KeyboardArrowDownIcon"
+                        focusable="false"
+                        viewBox="0 0 24 24"
+                      >
+                        <path
+                          d="M7.41 8.59 12 13.17l4.59-4.58L18 10l-6 6-6-6z"
+                        />
+                      </svg>
+                    </button>
+                  </div>
                 </div>
                 <div
                   class="cell trials-header"
@@ -1056,7 +1083,7 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                 />
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-1g9rwfw"
                 role="row"
               >
                 <div
@@ -1115,11 +1142,15 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                   role="cell"
                 >
                   <div
-                    class="status-hint MuiBox-root css-1dj4wrv"
-                  />
+                    class="MuiBox-root css-j0pheo"
+                  >
+                    <div
+                      class="status-hint MuiBox-root css-1dj4wrv"
+                    />
+                  </div>
                 </div>
                 <div
-                  class="difference-size cell"
+                  class="significance cell"
                   role="cell"
                 >
                   -
@@ -1183,7 +1214,7 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_p_"
+                    aria-controls="_r_q_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -1205,7 +1236,7 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                 </div>
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-1g9rwfw"
                 role="row"
               >
                 <div
@@ -1250,11 +1281,15 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                   role="cell"
                 >
                   <div
-                    class="status-hint MuiBox-root css-1dj4wrv"
-                  />
+                    class="MuiBox-root css-j0pheo"
+                  >
+                    <div
+                      class="status-hint MuiBox-root css-1dj4wrv"
+                    />
+                  </div>
                 </div>
                 <div
-                  class="difference-size cell"
+                  class="significance cell"
                   role="cell"
                 >
                   -
@@ -1318,7 +1353,7 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_s_"
+                    aria-controls="_r_t_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -1340,7 +1375,7 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                 </div>
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-1g9rwfw"
                 role="row"
               >
                 <div
@@ -1385,11 +1420,15 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                   role="cell"
                 >
                   <div
-                    class="status-hint MuiBox-root css-1dj4wrv"
-                  />
+                    class="MuiBox-root css-j0pheo"
+                  >
+                    <div
+                      class="status-hint MuiBox-root css-1dj4wrv"
+                    />
+                  </div>
                 </div>
                 <div
-                  class="difference-size cell"
+                  class="significance cell"
                   role="cell"
                 >
                   -
@@ -1453,7 +1492,7 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_v_"
+                    aria-controls="_r_10_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -1475,7 +1514,7 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                 </div>
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-1g9rwfw"
                 role="row"
               >
                 <div
@@ -1520,11 +1559,15 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                   role="cell"
                 >
                   <div
-                    class="status-hint MuiBox-root css-1dj4wrv"
-                  />
+                    class="MuiBox-root css-j0pheo"
+                  >
+                    <div
+                      class="status-hint MuiBox-root css-1dj4wrv"
+                    />
+                  </div>
                 </div>
                 <div
-                  class="difference-size cell"
+                  class="significance cell"
                   role="cell"
                 >
                   -
@@ -1588,7 +1631,7 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_12_"
+                    aria-controls="_r_13_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -1610,7 +1653,7 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                 </div>
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-1g9rwfw"
                 role="row"
               >
                 <div
@@ -1655,11 +1698,15 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                   role="cell"
                 >
                   <div
-                    class="status-hint MuiBox-root css-1dj4wrv"
-                  />
+                    class="MuiBox-root css-j0pheo"
+                  >
+                    <div
+                      class="status-hint MuiBox-root css-1dj4wrv"
+                    />
+                  </div>
                 </div>
                 <div
-                  class="difference-size cell"
+                  class="significance cell"
                   role="cell"
                 >
                   -
@@ -1723,7 +1770,7 @@ exports[`SubtestsResultsView Component Tests should render the subtests results
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_15_"
+                    aria-controls="_r_16_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -2534,7 +2581,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                           aria-invalid="false"
                           aria-label="Search by title"
                           class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd css-3v3un6-MuiInputBase-input-MuiOutlinedInput-input"
-                          id="_r_r3_"
+                          id="_r_rh_"
                           placeholder="Filter results"
                           type="search"
                           value=""
@@ -2665,7 +2712,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
               role="table"
             >
               <div
-                class="fws74y3 f1l733lh"
+                class="f3v5asi f1l733lh"
                 data-testid="table-header"
                 role="row"
               >
@@ -2792,22 +2839,21 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   </button>
                 </div>
                 <div
-                  class="cell difference-size-header"
+                  class="cell significance-header"
                   role="columnheader"
                 >
-                  <span
-                    aria-label="Shows how big the difference between Base and New is, in plain words: negligible (barely any), small, medium, or large. It comes from how much the Base and New results overlap — the less they overlap, the bigger the difference."
-                    class="MuiBox-root css-1tkq7a4"
-                    data-mui-internal-clone-element="true"
+                  <div
+                    class="MuiButtonGroup-root MuiButtonGroup-contained MuiButtonGroup-horizontal MuiButtonGroup-disableElevation MuiButtonGroup-colorTableHeaderButton css-1fyroww-MuiButtonGroup-root"
+                    role="group"
                   >
                     <button
-                      aria-label="Difference Size (Click to sort by this column)"
-                      class="MuiButtonBase-root MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation css-7upxw3-MuiButtonBase-root-MuiButton-root"
+                      aria-label="Significance (Click to sort by this column)"
+                      class="MuiButtonBase-root MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButtonGroup-firstButton css-17eldkb-MuiButtonBase-root-MuiButton-root"
                       tabindex="0"
                       type="button"
                     >
                       <svg
-                        class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-10d4m26-MuiSvgIcon-root"
+                        class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
                         data-testid="SwapVertIcon"
                         focusable="false"
                         role="img"
@@ -2817,12 +2863,40 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                           d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
                         />
                         <title>
-                          Not sorted by Difference Size
+                          Not sorted by Significance
                         </title>
                       </svg>
-                      Difference Size
                     </button>
-                  </span>
+                    <button
+                      aria-haspopup="true"
+                      aria-label="Significance (Click to filter values)"
+                      class="MuiButtonBase-root MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation MuiButtonGroup-lastButton css-l81dbu-MuiButtonBase-root-MuiButton-root"
+                      data-mui-internal-clone-element="true"
+                      tabindex="0"
+                      type="button"
+                    >
+                      Significance
+                      <div
+                        aria-label="2 items selected"
+                        class="MuiBox-root css-18uhbjh"
+                      >
+                        (
+                        2
+                        )
+                      </div>
+                      <svg
+                        aria-hidden="true"
+                        class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-120he73-MuiSvgIcon-root"
+                        data-testid="KeyboardArrowDownIcon"
+                        focusable="false"
+                        viewBox="0 0 24 24"
+                      >
+                        <path
+                          d="M7.41 8.59 12 13.17l4.59-4.58L18 10l-6 6-6-6z"
+                        />
+                      </svg>
+                    </button>
+                  </div>
                 </div>
                 <div
                   class="cell trials-header"
@@ -2846,7 +2920,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                 />
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-1g9rwfw"
                 role="row"
               >
                 <div
@@ -2907,14 +2981,23 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   role="cell"
                 >
                   <div
-                    class="status-hint MuiBox-root css-1dj4wrv"
-                  />
+                    class="MuiBox-root css-j0pheo"
+                  >
+                    <div
+                      class="status-hint MuiBox-root css-1dj4wrv"
+                    />
+                    <span
+                      class="difference-size MuiBox-root css-kmk2bl"
+                    >
+                      Negligible
+                    </span>
+                  </div>
                 </div>
                 <div
-                  class="difference-size cell"
+                  class="significance cell"
                   role="cell"
                 >
-                  Negligible
+                  Noise
                 </div>
                 <div
                   class="total-runs cell"
@@ -2975,7 +3058,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_ra_"
+                    aria-controls="_r_ro_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -2997,7 +3080,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                 </div>
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-1g9rwfw"
                 role="row"
               >
                 <div
@@ -3044,27 +3127,36 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   role="cell"
                 >
                   <div
-                    class="status-hint status-hint-regression MuiBox-root css-ucc9gw"
+                    class="MuiBox-root css-j0pheo"
                   >
-                    <svg
-                      aria-hidden="true"
-                      class="MuiSvgIcon-root MuiSvgIcon-colorError MuiSvgIcon-fontSizeMedium css-r7hube-MuiSvgIcon-root"
-                      data-testid="ThumbDownIcon"
-                      focusable="false"
-                      viewBox="0 0 24 24"
+                    <div
+                      class="status-hint status-hint-regression MuiBox-root css-ucc9gw"
                     >
-                      <path
-                        d="M15 3H6c-.83 0-1.54.5-1.84 1.22l-3.02 7.05c-.09.23-.14.47-.14.73v2c0 1.1.9 2 2 2h6.31l-.95 4.57-.03.32c0 .41.17.79.44 1.06L9.83 23l6.59-6.59c.36-.36.58-.86.58-1.41V5c0-1.1-.9-2-2-2m4 0v12h4V3z"
-                      />
-                    </svg>
-                    Regression
+                      <svg
+                        aria-hidden="true"
+                        class="MuiSvgIcon-root MuiSvgIcon-colorError MuiSvgIcon-fontSizeMedium css-r7hube-MuiSvgIcon-root"
+                        data-testid="ThumbDownIcon"
+                        focusable="false"
+                        viewBox="0 0 24 24"
+                      >
+                        <path
+                          d="M15 3H6c-.83 0-1.54.5-1.84 1.22l-3.02 7.05c-.09.23-.14.47-.14.73v2c0 1.1.9 2 2 2h6.31l-.95 4.57-.03.32c0 .41.17.79.44 1.06L9.83 23l6.59-6.59c.36-.36.58-.86.58-1.41V5c0-1.1-.9-2-2-2m4 0v12h4V3z"
+                        />
+                      </svg>
+                      Regression
+                    </div>
+                    <span
+                      class="difference-size MuiBox-root css-kmk2bl"
+                    >
+                      Negligible
+                    </span>
                   </div>
                 </div>
                 <div
-                  class="difference-size cell"
+                  class="significance cell"
                   role="cell"
                 >
-                  Negligible
+                  Real
                 </div>
                 <div
                   class="total-runs cell"
@@ -3125,7 +3217,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_rd_"
+                    aria-controls="_r_rr_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -3147,7 +3239,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                 </div>
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-1g9rwfw"
                 role="row"
               >
                 <div
@@ -3194,14 +3286,23 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   role="cell"
                 >
                   <div
-                    class="status-hint MuiBox-root css-1dj4wrv"
-                  />
+                    class="MuiBox-root css-j0pheo"
+                  >
+                    <div
+                      class="status-hint MuiBox-root css-1dj4wrv"
+                    />
+                    <span
+                      class="difference-size MuiBox-root css-kmk2bl"
+                    >
+                      Negligible
+                    </span>
+                  </div>
                 </div>
                 <div
-                  class="difference-size cell"
+                  class="significance cell"
                   role="cell"
                 >
-                  Negligible
+                  Real
                 </div>
                 <div
                   class="total-runs cell"
@@ -3262,7 +3363,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_rg_"
+                    aria-controls="_r_ru_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -3284,7 +3385,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                 </div>
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-1g9rwfw"
                 role="row"
               >
                 <div
@@ -3331,14 +3432,23 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   role="cell"
                 >
                   <div
-                    class="status-hint MuiBox-root css-1dj4wrv"
-                  />
+                    class="MuiBox-root css-j0pheo"
+                  >
+                    <div
+                      class="status-hint MuiBox-root css-1dj4wrv"
+                    />
+                    <span
+                      class="difference-size MuiBox-root css-kmk2bl"
+                    >
+                      Small
+                    </span>
+                  </div>
                 </div>
                 <div
-                  class="difference-size cell"
+                  class="significance cell"
                   role="cell"
                 >
-                  Small
+                  Real
                 </div>
                 <div
                   class="total-runs cell"
@@ -3399,7 +3509,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_rj_"
+                    aria-controls="_r_s1_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -3421,7 +3531,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                 </div>
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-1g9rwfw"
                 role="row"
               >
                 <div
@@ -3468,27 +3578,36 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   role="cell"
                 >
                   <div
-                    class="status-hint status-hint-improvement MuiBox-root css-1h9ue86"
+                    class="MuiBox-root css-j0pheo"
                   >
-                    <svg
-                      aria-hidden="true"
-                      class="MuiSvgIcon-root MuiSvgIcon-colorSuccess MuiSvgIcon-fontSizeMedium css-p35293-MuiSvgIcon-root"
-                      data-testid="ThumbUpIcon"
-                      focusable="false"
-                      viewBox="0 0 24 24"
+                    <div
+                      class="status-hint status-hint-improvement MuiBox-root css-1h9ue86"
                     >
-                      <path
-                        d="M1 21h4V9H1zm22-11c0-1.1-.9-2-2-2h-6.31l.95-4.57.03-.32c0-.41-.17-.79-.44-1.06L14.17 1 7.59 7.59C7.22 7.95 7 8.45 7 9v10c0 1.1.9 2 2 2h9c.83 0 1.54-.5 1.84-1.22l3.02-7.05c.09-.23.14-.47.14-.73z"
-                      />
-                    </svg>
-                    Improvement
+                      <svg
+                        aria-hidden="true"
+                        class="MuiSvgIcon-root MuiSvgIcon-colorSuccess MuiSvgIcon-fontSizeMedium css-p35293-MuiSvgIcon-root"
+                        data-testid="ThumbUpIcon"
+                        focusable="false"
+                        viewBox="0 0 24 24"
+                      >
+                        <path
+                          d="M1 21h4V9H1zm22-11c0-1.1-.9-2-2-2h-6.31l.95-4.57.03-.32c0-.41-.17-.79-.44-1.06L14.17 1 7.59 7.59C7.22 7.95 7 8.45 7 9v10c0 1.1.9 2 2 2h9c.83 0 1.54-.5 1.84-1.22l3.02-7.05c.09-.23.14-.47.14-.73z"
+                        />
+                      </svg>
+                      Improvement
+                    </div>
+                    <span
+                      class="difference-size MuiBox-root css-kmk2bl"
+                    >
+                      Negligible
+                    </span>
                   </div>
                 </div>
                 <div
-                  class="difference-size cell"
+                  class="significance cell"
                   role="cell"
                 >
-                  Negligible
+                  -
                 </div>
                 <div
                   class="total-runs cell"
@@ -3549,7 +3668,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_rm_"
+                    aria-controls="_r_s4_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -3976,7 +4095,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                           aria-invalid="false"
                           aria-label="Search by title"
                           class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd css-3v3un6-MuiInputBase-input-MuiOutlinedInput-input"
-                          id="_r_oi_"
+                          id="_r_ou_"
                           placeholder="Filter results"
                           type="search"
                           value=""
@@ -4107,7 +4226,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
               role="table"
             >
               <div
-                class="fws74y3 f1l733lh"
+                class="f3v5asi f1l733lh"
                 data-testid="table-header"
                 role="row"
               >
@@ -4234,22 +4353,21 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   </button>
                 </div>
                 <div
-                  class="cell difference-size-header"
+                  class="cell significance-header"
                   role="columnheader"
                 >
-                  <span
-                    aria-label="Shows how big the difference between Base and New is, in plain words: negligible (barely any), small, medium, or large. It comes from how much the Base and New results overlap — the less they overlap, the bigger the difference."
-                    class="MuiBox-root css-1tkq7a4"
-                    data-mui-internal-clone-element="true"
+                  <div
+                    class="MuiButtonGroup-root MuiButtonGroup-contained MuiButtonGroup-horizontal MuiButtonGroup-disableElevation MuiButtonGroup-colorTableHeaderButton css-1fyroww-MuiButtonGroup-root"
+                    role="group"
                   >
                     <button
-                      aria-label="Difference Size (Click to sort by this column)"
-                      class="MuiButtonBase-root MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation css-7upxw3-MuiButtonBase-root-MuiButton-root"
+                      aria-label="Significance (Click to sort by this column)"
+                      class="MuiButtonBase-root MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButtonGroup-firstButton css-17eldkb-MuiButtonBase-root-MuiButton-root"
                       tabindex="0"
                       type="button"
                     >
                       <svg
-                        class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-10d4m26-MuiSvgIcon-root"
+                        class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
                         data-testid="SwapVertIcon"
                         focusable="false"
                         role="img"
@@ -4259,12 +4377,40 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                           d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
                         />
                         <title>
-                          Not sorted by Difference Size
+                          Not sorted by Significance
                         </title>
                       </svg>
-                      Difference Size
                     </button>
-                  </span>
+                    <button
+                      aria-haspopup="true"
+                      aria-label="Significance (Click to filter values)"
+                      class="MuiButtonBase-root MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation MuiButtonGroup-lastButton css-l81dbu-MuiButtonBase-root-MuiButton-root"
+                      data-mui-internal-clone-element="true"
+                      tabindex="0"
+                      type="button"
+                    >
+                      Significance
+                      <div
+                        aria-label="2 items selected"
+                        class="MuiBox-root css-18uhbjh"
+                      >
+                        (
+                        2
+                        )
+                      </div>
+                      <svg
+                        aria-hidden="true"
+                        class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-120he73-MuiSvgIcon-root"
+                        data-testid="KeyboardArrowDownIcon"
+                        focusable="false"
+                        viewBox="0 0 24 24"
+                      >
+                        <path
+                          d="M7.41 8.59 12 13.17l4.59-4.58L18 10l-6 6-6-6z"
+                        />
+                      </svg>
+                    </button>
+                  </div>
                 </div>
                 <div
                   class="cell trials-header"
@@ -4288,7 +4434,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                 />
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-1g9rwfw"
                 role="row"
               >
                 <div
@@ -4349,14 +4495,23 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   role="cell"
                 >
                   <div
-                    class="status-hint MuiBox-root css-1dj4wrv"
-                  />
+                    class="MuiBox-root css-j0pheo"
+                  >
+                    <div
+                      class="status-hint MuiBox-root css-1dj4wrv"
+                    />
+                    <span
+                      class="difference-size MuiBox-root css-kmk2bl"
+                    >
+                      Negligible
+                    </span>
+                  </div>
                 </div>
                 <div
-                  class="difference-size cell"
+                  class="significance cell"
                   role="cell"
                 >
-                  Negligible
+                  Noise
                 </div>
                 <div
                   class="total-runs cell"
@@ -4417,7 +4572,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_op_"
+                    aria-controls="_r_p5_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -4439,7 +4594,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                 </div>
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-1g9rwfw"
                 role="row"
               >
                 <div
@@ -4486,27 +4641,36 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   role="cell"
                 >
                   <div
-                    class="status-hint status-hint-regression MuiBox-root css-ucc9gw"
+                    class="MuiBox-root css-j0pheo"
                   >
-                    <svg
-                      aria-hidden="true"
-                      class="MuiSvgIcon-root MuiSvgIcon-colorError MuiSvgIcon-fontSizeMedium css-r7hube-MuiSvgIcon-root"
-                      data-testid="ThumbDownIcon"
-                      focusable="false"
-                      viewBox="0 0 24 24"
+                    <div
+                      class="status-hint status-hint-regression MuiBox-root css-ucc9gw"
                     >
-                      <path
-                        d="M15 3H6c-.83 0-1.54.5-1.84 1.22l-3.02 7.05c-.09.23-.14.47-.14.73v2c0 1.1.9 2 2 2h6.31l-.95 4.57-.03.32c0 .41.17.79.44 1.06L9.83 23l6.59-6.59c.36-.36.58-.86.58-1.41V5c0-1.1-.9-2-2-2m4 0v12h4V3z"
-                      />
-                    </svg>
-                    Regression
+                      <svg
+                        aria-hidden="true"
+                        class="MuiSvgIcon-root MuiSvgIcon-colorError MuiSvgIcon-fontSizeMedium css-r7hube-MuiSvgIcon-root"
+                        data-testid="ThumbDownIcon"
+                        focusable="false"
+                        viewBox="0 0 24 24"
+                      >
+                        <path
+                          d="M15 3H6c-.83 0-1.54.5-1.84 1.22l-3.02 7.05c-.09.23-.14.47-.14.73v2c0 1.1.9 2 2 2h6.31l-.95 4.57-.03.32c0 .41.17.79.44 1.06L9.83 23l6.59-6.59c.36-.36.58-.86.58-1.41V5c0-1.1-.9-2-2-2m4 0v12h4V3z"
+                        />
+                      </svg>
+                      Regression
+                    </div>
+                    <span
+                      class="difference-size MuiBox-root css-kmk2bl"
+                    >
+                      Negligible
+                    </span>
                   </div>
                 </div>
                 <div
-                  class="difference-size cell"
+                  class="significance cell"
                   role="cell"
                 >
-                  Negligible
+                  Real
                 </div>
                 <div
                   class="total-runs cell"
@@ -4567,7 +4731,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_os_"
+                    aria-controls="_r_p8_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -4589,7 +4753,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                 </div>
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-1g9rwfw"
                 role="row"
               >
                 <div
@@ -4636,14 +4800,23 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   role="cell"
                 >
                   <div
-                    class="status-hint MuiBox-root css-1dj4wrv"
-                  />
+                    class="MuiBox-root css-j0pheo"
+                  >
+                    <div
+                      class="status-hint MuiBox-root css-1dj4wrv"
+                    />
+                    <span
+                      class="difference-size MuiBox-root css-kmk2bl"
+                    >
+                      Negligible
+                    </span>
+                  </div>
                 </div>
                 <div
-                  class="difference-size cell"
+                  class="significance cell"
                   role="cell"
                 >
-                  Negligible
+                  Real
                 </div>
                 <div
                   class="total-runs cell"
@@ -4704,7 +4877,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_ov_"
+                    aria-controls="_r_pb_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -4726,7 +4899,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                 </div>
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-1g9rwfw"
                 role="row"
               >
                 <div
@@ -4773,14 +4946,23 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   role="cell"
                 >
                   <div
-                    class="status-hint MuiBox-root css-1dj4wrv"
-                  />
+                    class="MuiBox-root css-j0pheo"
+                  >
+                    <div
+                      class="status-hint MuiBox-root css-1dj4wrv"
+                    />
+                    <span
+                      class="difference-size MuiBox-root css-kmk2bl"
+                    >
+                      Small
+                    </span>
+                  </div>
                 </div>
                 <div
-                  class="difference-size cell"
+                  class="significance cell"
                   role="cell"
                 >
-                  Small
+                  Real
                 </div>
                 <div
                   class="total-runs cell"
@@ -4841,7 +5023,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_p2_"
+                    aria-controls="_r_pe_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -4863,7 +5045,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                 </div>
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-1g9rwfw"
                 role="row"
               >
                 <div
@@ -4910,27 +5092,36 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   role="cell"
                 >
                   <div
-                    class="status-hint status-hint-improvement MuiBox-root css-1h9ue86"
+                    class="MuiBox-root css-j0pheo"
                   >
-                    <svg
-                      aria-hidden="true"
-                      class="MuiSvgIcon-root MuiSvgIcon-colorSuccess MuiSvgIcon-fontSizeMedium css-p35293-MuiSvgIcon-root"
-                      data-testid="ThumbUpIcon"
-                      focusable="false"
-                      viewBox="0 0 24 24"
+                    <div
+                      class="status-hint status-hint-improvement MuiBox-root css-1h9ue86"
                     >
-                      <path
-                        d="M1 21h4V9H1zm22-11c0-1.1-.9-2-2-2h-6.31l.95-4.57.03-.32c0-.41-.17-.79-.44-1.06L14.17 1 7.59 7.59C7.22 7.95 7 8.45 7 9v10c0 1.1.9 2 2 2h9c.83 0 1.54-.5 1.84-1.22l3.02-7.05c.09-.23.14-.47.14-.73z"
-                      />
-                    </svg>
-                    Improvement
+                      <svg
+                        aria-hidden="true"
+                        class="MuiSvgIcon-root MuiSvgIcon-colorSuccess MuiSvgIcon-fontSizeMedium css-p35293-MuiSvgIcon-root"
+                        data-testid="ThumbUpIcon"
+                        focusable="false"
+                        viewBox="0 0 24 24"
+                      >
+                        <path
+                          d="M1 21h4V9H1zm22-11c0-1.1-.9-2-2-2h-6.31l.95-4.57.03-.32c0-.41-.17-.79-.44-1.06L14.17 1 7.59 7.59C7.22 7.95 7 8.45 7 9v10c0 1.1.9 2 2 2h9c.83 0 1.54-.5 1.84-1.22l3.02-7.05c.09-.23.14-.47.14-.73z"
+                        />
+                      </svg>
+                      Improvement
+                    </div>
+                    <span
+                      class="difference-size MuiBox-root css-kmk2bl"
+                    >
+                      Negligible
+                    </span>
                   </div>
                 </div>
                 <div
-                  class="difference-size cell"
+                  class="significance cell"
                   role="cell"
                 >
-                  Negligible
+                  -
                 </div>
                 <div
                   class="total-runs cell"
@@ -4991,7 +5182,7 @@ exports[`SubtestsViewCompareOverTime Component Tests in mann-whitney-u testVersi
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_p5_"
+                    aria-controls="_r_ph_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -5418,7 +5609,7 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                           aria-invalid="false"
                           aria-label="Search by title"
                           class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd css-3v3un6-MuiInputBase-input-MuiOutlinedInput-input"
-                          id="_r_f4_"
+                          id="_r_fd_"
                           placeholder="Filter results"
                           type="search"
                           value=""
@@ -5549,7 +5740,7 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
               role="table"
             >
               <div
-                class="fws74y3 f1l733lh"
+                class="f3v5asi f1l733lh"
                 data-testid="table-header"
                 role="row"
               >
@@ -5676,22 +5867,21 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                   </button>
                 </div>
                 <div
-                  class="cell difference-size-header"
+                  class="cell significance-header"
                   role="columnheader"
                 >
-                  <span
-                    aria-label="Shows how big the difference between Base and New is, in plain words: negligible (barely any), small, medium, or large. It comes from how much the Base and New results overlap — the less they overlap, the bigger the difference."
-                    class="MuiBox-root css-1tkq7a4"
-                    data-mui-internal-clone-element="true"
+                  <div
+                    class="MuiButtonGroup-root MuiButtonGroup-contained MuiButtonGroup-horizontal MuiButtonGroup-disableElevation MuiButtonGroup-colorTableHeaderButton css-1fyroww-MuiButtonGroup-root"
+                    role="group"
                   >
                     <button
-                      aria-label="Difference Size (Click to sort by this column)"
-                      class="MuiButtonBase-root MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation css-7upxw3-MuiButtonBase-root-MuiButton-root"
+                      aria-label="Significance (Click to sort by this column)"
+                      class="MuiButtonBase-root MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButtonGroup-firstButton css-17eldkb-MuiButtonBase-root-MuiButton-root"
                       tabindex="0"
                       type="button"
                     >
                       <svg
-                        class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-10d4m26-MuiSvgIcon-root"
+                        class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
                         data-testid="SwapVertIcon"
                         focusable="false"
                         role="img"
@@ -5701,12 +5891,40 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                           d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
                         />
                         <title>
-                          Not sorted by Difference Size
+                          Not sorted by Significance
                         </title>
                       </svg>
-                      Difference Size
                     </button>
-                  </span>
+                    <button
+                      aria-haspopup="true"
+                      aria-label="Significance (Click to filter values)"
+                      class="MuiButtonBase-root MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation MuiButtonGroup-lastButton css-l81dbu-MuiButtonBase-root-MuiButton-root"
+                      data-mui-internal-clone-element="true"
+                      tabindex="0"
+                      type="button"
+                    >
+                      Significance
+                      <div
+                        aria-label="2 items selected"
+                        class="MuiBox-root css-18uhbjh"
+                      >
+                        (
+                        2
+                        )
+                      </div>
+                      <svg
+                        aria-hidden="true"
+                        class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-120he73-MuiSvgIcon-root"
+                        data-testid="KeyboardArrowDownIcon"
+                        focusable="false"
+                        viewBox="0 0 24 24"
+                      >
+                        <path
+                          d="M7.41 8.59 12 13.17l4.59-4.58L18 10l-6 6-6-6z"
+                        />
+                      </svg>
+                    </button>
+                  </div>
                 </div>
                 <div
                   class="cell trials-header"
@@ -5730,7 +5948,7 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                 />
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-1g9rwfw"
                 role="row"
               >
                 <div
@@ -5791,14 +6009,23 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                   role="cell"
                 >
                   <div
-                    class="status-hint MuiBox-root css-1dj4wrv"
-                  />
+                    class="MuiBox-root css-j0pheo"
+                  >
+                    <div
+                      class="status-hint MuiBox-root css-1dj4wrv"
+                    />
+                    <span
+                      class="difference-size MuiBox-root css-kmk2bl"
+                    >
+                      Negligible
+                    </span>
+                  </div>
                 </div>
                 <div
-                  class="difference-size cell"
+                  class="significance cell"
                   role="cell"
                 >
-                  Negligible
+                  Noise
                 </div>
                 <div
                   class="total-runs cell"
@@ -5859,7 +6086,7 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_fb_"
+                    aria-controls="_r_fk_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -5881,7 +6108,7 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                 </div>
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-1g9rwfw"
                 role="row"
               >
                 <div
@@ -5928,27 +6155,36 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                   role="cell"
                 >
                   <div
-                    class="status-hint status-hint-regression MuiBox-root css-ucc9gw"
+                    class="MuiBox-root css-j0pheo"
                   >
-                    <svg
-                      aria-hidden="true"
-                      class="MuiSvgIcon-root MuiSvgIcon-colorError MuiSvgIcon-fontSizeMedium css-r7hube-MuiSvgIcon-root"
-                      data-testid="ThumbDownIcon"
-                      focusable="false"
-                      viewBox="0 0 24 24"
+                    <div
+                      class="status-hint status-hint-regression MuiBox-root css-ucc9gw"
                     >
-                      <path
-                        d="M15 3H6c-.83 0-1.54.5-1.84 1.22l-3.02 7.05c-.09.23-.14.47-.14.73v2c0 1.1.9 2 2 2h6.31l-.95 4.57-.03.32c0 .41.17.79.44 1.06L9.83 23l6.59-6.59c.36-.36.58-.86.58-1.41V5c0-1.1-.9-2-2-2m4 0v12h4V3z"
-                      />
-                    </svg>
-                    Regression
+                      <svg
+                        aria-hidden="true"
+                        class="MuiSvgIcon-root MuiSvgIcon-colorError MuiSvgIcon-fontSizeMedium css-r7hube-MuiSvgIcon-root"
+                        data-testid="ThumbDownIcon"
+                        focusable="false"
+                        viewBox="0 0 24 24"
+                      >
+                        <path
+                          d="M15 3H6c-.83 0-1.54.5-1.84 1.22l-3.02 7.05c-.09.23-.14.47-.14.73v2c0 1.1.9 2 2 2h6.31l-.95 4.57-.03.32c0 .41.17.79.44 1.06L9.83 23l6.59-6.59c.36-.36.58-.86.58-1.41V5c0-1.1-.9-2-2-2m4 0v12h4V3z"
+                        />
+                      </svg>
+                      Regression
+                    </div>
+                    <span
+                      class="difference-size MuiBox-root css-kmk2bl"
+                    >
+                      Negligible
+                    </span>
                   </div>
                 </div>
                 <div
-                  class="difference-size cell"
+                  class="significance cell"
                   role="cell"
                 >
-                  Negligible
+                  Real
                 </div>
                 <div
                   class="total-runs cell"
@@ -6009,7 +6245,7 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_fe_"
+                    aria-controls="_r_fn_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -6031,7 +6267,7 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                 </div>
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-1g9rwfw"
                 role="row"
               >
                 <div
@@ -6078,14 +6314,23 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                   role="cell"
                 >
                   <div
-                    class="status-hint MuiBox-root css-1dj4wrv"
-                  />
+                    class="MuiBox-root css-j0pheo"
+                  >
+                    <div
+                      class="status-hint MuiBox-root css-1dj4wrv"
+                    />
+                    <span
+                      class="difference-size MuiBox-root css-kmk2bl"
+                    >
+                      Negligible
+                    </span>
+                  </div>
                 </div>
                 <div
-                  class="difference-size cell"
+                  class="significance cell"
                   role="cell"
                 >
-                  Negligible
+                  Real
                 </div>
                 <div
                   class="total-runs cell"
@@ -6146,7 +6391,7 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_fh_"
+                    aria-controls="_r_fq_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -6168,7 +6413,7 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                 </div>
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-1g9rwfw"
                 role="row"
               >
                 <div
@@ -6215,14 +6460,23 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                   role="cell"
                 >
                   <div
-                    class="status-hint MuiBox-root css-1dj4wrv"
-                  />
+                    class="MuiBox-root css-j0pheo"
+                  >
+                    <div
+                      class="status-hint MuiBox-root css-1dj4wrv"
+                    />
+                    <span
+                      class="difference-size MuiBox-root css-kmk2bl"
+                    >
+                      Small
+                    </span>
+                  </div>
                 </div>
                 <div
-                  class="difference-size cell"
+                  class="significance cell"
                   role="cell"
                 >
-                  Small
+                  Real
                 </div>
                 <div
                   class="total-runs cell"
@@ -6283,7 +6537,7 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_fk_"
+                    aria-controls="_r_ft_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -6305,7 +6559,7 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                 </div>
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-1g9rwfw"
                 role="row"
               >
                 <div
@@ -6352,27 +6606,36 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                   role="cell"
                 >
                   <div
-                    class="status-hint status-hint-improvement MuiBox-root css-1h9ue86"
+                    class="MuiBox-root css-j0pheo"
                   >
-                    <svg
-                      aria-hidden="true"
-                      class="MuiSvgIcon-root MuiSvgIcon-colorSuccess MuiSvgIcon-fontSizeMedium css-p35293-MuiSvgIcon-root"
-                      data-testid="ThumbUpIcon"
-                      focusable="false"
-                      viewBox="0 0 24 24"
+                    <div
+                      class="status-hint status-hint-improvement MuiBox-root css-1h9ue86"
                     >
-                      <path
-                        d="M1 21h4V9H1zm22-11c0-1.1-.9-2-2-2h-6.31l.95-4.57.03-.32c0-.41-.17-.79-.44-1.06L14.17 1 7.59 7.59C7.22 7.95 7 8.45 7 9v10c0 1.1.9 2 2 2h9c.83 0 1.54-.5 1.84-1.22l3.02-7.05c.09-.23.14-.47.14-.73z"
-                      />
-                    </svg>
-                    Improvement
+                      <svg
+                        aria-hidden="true"
+                        class="MuiSvgIcon-root MuiSvgIcon-colorSuccess MuiSvgIcon-fontSizeMedium css-p35293-MuiSvgIcon-root"
+                        data-testid="ThumbUpIcon"
+                        focusable="false"
+                        viewBox="0 0 24 24"
+                      >
+                        <path
+                          d="M1 21h4V9H1zm22-11c0-1.1-.9-2-2-2h-6.31l.95-4.57.03-.32c0-.41-.17-.79-.44-1.06L14.17 1 7.59 7.59C7.22 7.95 7 8.45 7 9v10c0 1.1.9 2 2 2h9c.83 0 1.54-.5 1.84-1.22l3.02-7.05c.09-.23.14-.47.14-.73z"
+                        />
+                      </svg>
+                      Improvement
+                    </div>
+                    <span
+                      class="difference-size MuiBox-root css-kmk2bl"
+                    >
+                      Negligible
+                    </span>
                   </div>
                 </div>
                 <div
-                  class="difference-size cell"
+                  class="significance cell"
                   role="cell"
                 >
-                  Negligible
+                  -
                 </div>
                 <div
                   class="total-runs cell"
@@ -6433,7 +6696,7 @@ exports[`SubtestsViewCompareOverTime Component Tests renders over-time view when
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_fn_"
+                    aria-controls="_r_g0_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -6860,7 +7123,7 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                           aria-invalid="false"
                           aria-label="Search by title"
                           class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd css-3v3un6-MuiInputBase-input-MuiOutlinedInput-input"
-                          id="_r_cj_"
+                          id="_r_cq_"
                           placeholder="Filter results"
                           type="search"
                           value=""
@@ -6991,7 +7254,7 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
               role="table"
             >
               <div
-                class="fws74y3 f1l733lh"
+                class="f3v5asi f1l733lh"
                 data-testid="table-header"
                 role="row"
               >
@@ -7118,22 +7381,21 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                   </button>
                 </div>
                 <div
-                  class="cell difference-size-header"
+                  class="cell significance-header"
                   role="columnheader"
                 >
-                  <span
-                    aria-label="Shows how big the difference between Base and New is, in plain words: negligible (barely any), small, medium, or large. It comes from how much the Base and New results overlap — the less they overlap, the bigger the difference."
-                    class="MuiBox-root css-1tkq7a4"
-                    data-mui-internal-clone-element="true"
+                  <div
+                    class="MuiButtonGroup-root MuiButtonGroup-contained MuiButtonGroup-horizontal MuiButtonGroup-disableElevation MuiButtonGroup-colorTableHeaderButton css-1fyroww-MuiButtonGroup-root"
+                    role="group"
                   >
                     <button
-                      aria-label="Difference Size (Click to sort by this column)"
-                      class="MuiButtonBase-root MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation css-7upxw3-MuiButtonBase-root-MuiButton-root"
+                      aria-label="Significance (Click to sort by this column)"
+                      class="MuiButtonBase-root MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButtonGroup-firstButton css-17eldkb-MuiButtonBase-root-MuiButton-root"
                       tabindex="0"
                       type="button"
                     >
                       <svg
-                        class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-10d4m26-MuiSvgIcon-root"
+                        class="MuiSvgIcon-root MuiSvgIcon-fontSizeSmall css-54rgmy-MuiSvgIcon-root"
                         data-testid="SwapVertIcon"
                         focusable="false"
                         role="img"
@@ -7143,12 +7405,40 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                           d="M16 17.01V10h-2v7.01h-3L15 21l4-3.99zM9 3 5 6.99h3V14h2V6.99h3z"
                         />
                         <title>
-                          Not sorted by Difference Size
+                          Not sorted by Significance
                         </title>
                       </svg>
-                      Difference Size
                     </button>
-                  </span>
+                    <button
+                      aria-haspopup="true"
+                      aria-label="Significance (Click to filter values)"
+                      class="MuiButtonBase-root MuiButtonGroup-grouped MuiButtonGroup-groupedHorizontal MuiButtonGroup-groupedContained MuiButtonGroup-groupedContainedHorizontal MuiButtonGroup-groupedContainedTableHeaderButton MuiButton-root MuiButton-contained MuiButton-containedTableHeaderButton MuiButton-sizeSmall MuiButton-containedSizeSmall MuiButton-colorTableHeaderButton MuiButton-disableElevation MuiButtonGroup-lastButton css-l81dbu-MuiButtonBase-root-MuiButton-root"
+                      data-mui-internal-clone-element="true"
+                      tabindex="0"
+                      type="button"
+                    >
+                      Significance
+                      <div
+                        aria-label="2 items selected"
+                        class="MuiBox-root css-18uhbjh"
+                      >
+                        (
+                        2
+                        )
+                      </div>
+                      <svg
+                        aria-hidden="true"
+                        class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium css-120he73-MuiSvgIcon-root"
+                        data-testid="KeyboardArrowDownIcon"
+                        focusable="false"
+                        viewBox="0 0 24 24"
+                      >
+                        <path
+                          d="M7.41 8.59 12 13.17l4.59-4.58L18 10l-6 6-6-6z"
+                        />
+                      </svg>
+                    </button>
+                  </div>
                 </div>
                 <div
                   class="cell trials-header"
@@ -7172,7 +7462,7 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                 />
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-1g9rwfw"
                 role="row"
               >
                 <div
@@ -7231,11 +7521,15 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                   role="cell"
                 >
                   <div
-                    class="status-hint MuiBox-root css-1dj4wrv"
-                  />
+                    class="MuiBox-root css-j0pheo"
+                  >
+                    <div
+                      class="status-hint MuiBox-root css-1dj4wrv"
+                    />
+                  </div>
                 </div>
                 <div
-                  class="difference-size cell"
+                  class="significance cell"
                   role="cell"
                 >
                   -
@@ -7299,7 +7593,7 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_cq_"
+                    aria-controls="_r_d1_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -7321,7 +7615,7 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                 </div>
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-1g9rwfw"
                 role="row"
               >
                 <div
@@ -7366,11 +7660,15 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                   role="cell"
                 >
                   <div
-                    class="status-hint MuiBox-root css-1dj4wrv"
-                  />
+                    class="MuiBox-root css-j0pheo"
+                  >
+                    <div
+                      class="status-hint MuiBox-root css-1dj4wrv"
+                    />
+                  </div>
                 </div>
                 <div
-                  class="difference-size cell"
+                  class="significance cell"
                   role="cell"
                 >
                   -
@@ -7434,7 +7732,7 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_ct_"
+                    aria-controls="_r_d4_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -7456,7 +7754,7 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                 </div>
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-1g9rwfw"
                 role="row"
               >
                 <div
@@ -7501,11 +7799,15 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                   role="cell"
                 >
                   <div
-                    class="status-hint MuiBox-root css-1dj4wrv"
-                  />
+                    class="MuiBox-root css-j0pheo"
+                  >
+                    <div
+                      class="status-hint MuiBox-root css-1dj4wrv"
+                    />
+                  </div>
                 </div>
                 <div
-                  class="difference-size cell"
+                  class="significance cell"
                   role="cell"
                 >
                   -
@@ -7569,7 +7871,7 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_d0_"
+                    aria-controls="_r_d7_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -7591,7 +7893,7 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                 </div>
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-1g9rwfw"
                 role="row"
               >
                 <div
@@ -7636,11 +7938,15 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                   role="cell"
                 >
                   <div
-                    class="status-hint MuiBox-root css-1dj4wrv"
-                  />
+                    class="MuiBox-root css-j0pheo"
+                  >
+                    <div
+                      class="status-hint MuiBox-root css-1dj4wrv"
+                    />
+                  </div>
                 </div>
                 <div
-                  class="difference-size cell"
+                  class="significance cell"
                   role="cell"
                 >
                   -
@@ -7704,7 +8010,7 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_d3_"
+                    aria-controls="_r_da_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
@@ -7726,7 +8032,7 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                 </div>
               </div>
               <div
-                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-aji8h8"
+                class="revisionRow f146qxgq f1dlt78d MuiBox-root css-1g9rwfw"
                 role="row"
               >
                 <div
@@ -7771,11 +8077,15 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                   role="cell"
                 >
                   <div
-                    class="status-hint MuiBox-root css-1dj4wrv"
-                  />
+                    class="MuiBox-root css-j0pheo"
+                  >
+                    <div
+                      class="status-hint MuiBox-root css-1dj4wrv"
+                    />
+                  </div>
                 </div>
                 <div
-                  class="difference-size cell"
+                  class="significance cell"
                   role="cell"
                 >
                   -
@@ -7839,7 +8149,7 @@ exports[`SubtestsViewCompareOverTime Component Tests should render the subtests
                   role="cell"
                 >
                   <button
-                    aria-controls="_r_d6_"
+                    aria-controls="_r_dd_"
                     aria-expanded="false"
                     class="MuiButtonBase-root MuiIconButton-root MuiIconButton-colorPrimary MuiIconButton-sizeSmall css-1pgb59k-MuiButtonBase-root-MuiIconButton-root"
                     tabindex="0"
diff --git a/src/__tests__/Search/__snapshots__/CompareOverTime.test.tsx.snap b/src/__tests__/Search/__snapshots__/CompareOverTime.test.tsx.snap
index 5955552aa..fd1badedc 100644
--- a/src/__tests__/Search/__snapshots__/CompareOverTime.test.tsx.snap
+++ b/src/__tests__/Search/__snapshots__/CompareOverTime.test.tsx.snap
@@ -742,7 +742,7 @@ exports[`Compare Over Time selects and displays new time range when clicked 1`]
 <ul
   aria-labelledby="select-timerange-label"
   class="MuiList-root MuiList-padding MuiMenu-list css-1toxriw-MuiList-root-MuiMenu-list"
-  id="_r_5o_"
+  id="_r_5p_"
   role="listbox"
   tabindex="-1"
 >
@@ -1221,7 +1221,7 @@ exports[`Compare Over Time should have an edit mode in Results View: After click
                     autocapitalize="none"
                     autocomplete="off"
                     class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-16cokj7-MuiInputBase-input-MuiOutlinedInput-input"
-                    id="_r_cr_"
+                    id="_r_cu_"
                     placeholder="Search by revision ID or author email"
                     role="combobox"
                     spellcheck="false"
@@ -2053,7 +2053,7 @@ exports[`Compare Over Time should remove the checked revision once X button is c
                     autocapitalize="none"
                     autocomplete="off"
                     class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-9wexq8-MuiInputBase-input-MuiOutlinedInput-input"
-                    id="_r_7o_"
+                    id="_r_7p_"
                     placeholder="Search by revision ID or author email"
                     role="combobox"
                     spellcheck="false"
@@ -2993,7 +2993,7 @@ exports[`Compare Over Time should update base repo, revisions and time-range aft
                     autocapitalize="none"
                     autocomplete="off"
                     class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-16cokj7-MuiInputBase-input-MuiOutlinedInput-input"
-                    id="_r_e2_"
+                    id="_r_e6_"
                     placeholder="Search by revision ID or author email"
                     role="combobox"
                     spellcheck="false"
diff --git a/src/__tests__/Search/__snapshots__/CompareWithBase.test.tsx.snap b/src/__tests__/Search/__snapshots__/CompareWithBase.test.tsx.snap
index 645bc3d3a..29f716224 100644
--- a/src/__tests__/Search/__snapshots__/CompareWithBase.test.tsx.snap
+++ b/src/__tests__/Search/__snapshots__/CompareWithBase.test.tsx.snap
@@ -742,7 +742,7 @@ exports[`Compare With Base selects and displays new framework when clicked 1`] =
 <ul
   aria-labelledby="select-framework-label"
   class="MuiList-root MuiList-padding MuiMenu-list css-1toxriw-MuiList-root-MuiMenu-list"
-  id="_r_2j_"
+  id="_r_2k_"
   role="listbox"
   tabindex="-1"
 >
@@ -1028,7 +1028,7 @@ exports[`Compare With Base should have an edit mode in Results View: After click
                     autocapitalize="none"
                     autocomplete="off"
                     class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-16cokj7-MuiInputBase-input-MuiOutlinedInput-input"
-                    id="_r_4a_"
+                    id="_r_4b_"
                     placeholder="Search by revision ID or author email"
                     role="combobox"
                     spellcheck="false"
@@ -1375,7 +1375,7 @@ exports[`Compare With Base should have an edit mode in Results View: After click
                     autocapitalize="none"
                     autocomplete="off"
                     class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-16cokj7-MuiInputBase-input-MuiOutlinedInput-input"
-                    id="_r_4j_"
+                    id="_r_4k_"
                     placeholder="Search by revision ID or author email"
                     role="combobox"
                     spellcheck="false"
@@ -1626,7 +1626,7 @@ exports[`Compare With Base should have an edit mode in Results View: After click
                     autocapitalize="none"
                     autocomplete="off"
                     class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-16cokj7-MuiInputBase-input-MuiOutlinedInput-input"
-                    id="_r_4a_"
+                    id="_r_4b_"
                     placeholder="Search by revision ID or author email"
                     role="combobox"
                     spellcheck="false"
@@ -1973,7 +1973,7 @@ exports[`Compare With Base should have an edit mode in Results View: After click
                     autocapitalize="none"
                     autocomplete="off"
                     class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-16cokj7-MuiInputBase-input-MuiOutlinedInput-input"
-                    id="_r_4j_"
+                    id="_r_4k_"
                     placeholder="Search by revision ID or author email"
                     role="combobox"
                     spellcheck="false"
@@ -2388,7 +2388,7 @@ exports[`Compare With Base should have an edit mode in Results View: Initial sta
                     autocapitalize="none"
                     autocomplete="off"
                     class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-16cokj7-MuiInputBase-input-MuiOutlinedInput-input"
-                    id="_r_4a_"
+                    id="_r_4b_"
                     placeholder="Search by revision ID or author email"
                     role="combobox"
                     spellcheck="false"
@@ -2735,7 +2735,7 @@ exports[`Compare With Base should have an edit mode in Results View: Initial sta
                     autocapitalize="none"
                     autocomplete="off"
                     class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-16cokj7-MuiInputBase-input-MuiOutlinedInput-input"
-                    id="_r_4j_"
+                    id="_r_4k_"
                     placeholder="Search by revision ID or author email"
                     role="combobox"
                     spellcheck="false"
@@ -3154,7 +3154,7 @@ exports[`Compare With Base should have an edit mode in Results View: after remov
                     autocapitalize="none"
                     autocomplete="off"
                     class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-16cokj7-MuiInputBase-input-MuiOutlinedInput-input"
-                    id="_r_4a_"
+                    id="_r_4b_"
                     placeholder="Search by revision ID or author email"
                     role="combobox"
                     spellcheck="false"
@@ -3341,7 +3341,7 @@ exports[`Compare With Base should have an edit mode in Results View: after remov
                     autocapitalize="none"
                     autocomplete="off"
                     class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-16cokj7-MuiInputBase-input-MuiOutlinedInput-input"
-                    id="_r_4j_"
+                    id="_r_4k_"
                     placeholder="Search by revision ID or author email"
                     role="combobox"
                     spellcheck="false"
@@ -3792,7 +3792,7 @@ exports[`Compare With Base should have an edit mode in Results View: after remov
                     autocapitalize="none"
                     autocomplete="off"
                     class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-16cokj7-MuiInputBase-input-MuiOutlinedInput-input"
-                    id="_r_4a_"
+                    id="_r_4b_"
                     placeholder="Search by revision ID or author email"
                     role="combobox"
                     spellcheck="false"
@@ -4139,7 +4139,7 @@ exports[`Compare With Base should have an edit mode in Results View: after remov
                     autocapitalize="none"
                     autocomplete="off"
                     class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputSizeSmall MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-16cokj7-MuiInputBase-input-MuiOutlinedInput-input"
-                    id="_r_4j_"
+                    id="_r_4k_"
                     placeholder="Search by revision ID or author email"
                     role="combobox"
                     spellcheck="false"
@@ -4585,7 +4585,7 @@ exports[`Compare With Base should remove the checked revision once X button is c
                                   autocapitalize="none"
                                   autocomplete="off"
                                   class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-9wexq8-MuiInputBase-input-MuiOutlinedInput-input"
-                                  id="_r_35_"
+                                  id="_r_36_"
                                   placeholder="Search by revision ID or author email"
                                   role="combobox"
                                   spellcheck="false"
@@ -4772,7 +4772,7 @@ exports[`Compare With Base should remove the checked revision once X button is c
                                   autocapitalize="none"
                                   autocomplete="off"
                                   class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-9wexq8-MuiInputBase-input-MuiOutlinedInput-input"
-                                  id="_r_3a_"
+                                  id="_r_3b_"
                                   placeholder="Search by revision ID or author email"
                                   role="combobox"
                                   spellcheck="false"
@@ -5238,7 +5238,7 @@ exports[`Compare With Base should remove the checked revision once X button is c
                                   autocapitalize="none"
                                   autocomplete="off"
                                   class="MuiInputBase-input MuiOutlinedInput-input MuiInputBase-inputAdornedStart MuiInputBase-inputAdornedEnd MuiAutocomplete-input MuiAutocomplete-inputFocused css-9wexq8-MuiInputBase-input-MuiOutlinedInput-input"
-                                  id="_r_3m_"
+                                  id="_r_3n_"
                                   placeholder="Search by revision ID or author email"
                                   role="combobox"
                                   spellcheck="false"
@@ -5395,7 +5395,7 @@ exports[`Compare With Base should remove the checked revision once X button is c
 exports[`Compare With Base updates the framework and url when a new one is selected: after awsy is selected 1`] = `
 <ul
   class="MuiList-root MuiList-padding MuiMenu-list css-1toxriw-MuiList-root-MuiMenu-list"
-  id="_r_6k_"
+  id="_r_6m_"
   role="listbox"
   tabindex="-1"
 >
diff --git a/src/common/constants.ts b/src/common/constants.ts
index 8137c73c2..778218d72 100644
--- a/src/common/constants.ts
+++ b/src/common/constants.ts
@@ -326,7 +326,7 @@ export const STUDENT_T = 'student-t' as TestVersion;
 export const tooltipSignificance =
   'Significance of the comparison as determined by a Mann Whitney U test. A significant comparison has a p-value of less than 0.05.';
 export const tooltipStatusMannWhitney =
-  'An improvement or regression being shown here means that the effect size is meaningful, and the difference has a significant p-value.';
+  'An improvement or regression being shown here means that the effect size is meaningful, and the difference has a significant p-value. The word beneath (negligible, small, medium, or large) is how big that difference is — the less the Base and New results overlap, the bigger it is.';
 export const tooltipTotalRuns =
   'The total number of tasks/jobs that ran for this metric.';
 export const tooltipBaseMean =
@@ -339,5 +339,3 @@ export const tooltipDelta =
   'The percentage difference between the Base and New values';
 export const tooltipMedianDiff =
   'Shows how much the middle result changed from Base to New. We line up all the runs from smallest to biggest and pick the middle one for each side, then show the change as a percent. A postive sign means New is higher; a negative sign means New is lower.';
-export const tooltipDifferenceSize =
-  'Shows how big the difference between Base and New is, in plain words: negligible (barely any), small, medium, or large. It comes from how much the Base and New results overlap — the less they overlap, the bigger the difference.';
diff --git a/src/common/testVersions/mannWhitney.tsx b/src/common/testVersions/mannWhitney.tsx
index bac7d2b06..6d6f6434b 100644
--- a/src/common/testVersions/mannWhitney.tsx
+++ b/src/common/testVersions/mannWhitney.tsx
@@ -1,4 +1,3 @@
-import KeyboardDoubleArrowUpIcon from '@mui/icons-material/KeyboardDoubleArrowUp';
 import ThumbDownIcon from '@mui/icons-material/ThumbDown';
 import ThumbUpIcon from '@mui/icons-material/ThumbUp';
 import WarningIcon from '@mui/icons-material/Warning';
@@ -26,7 +25,6 @@ import { shapiroWilkTest } from '../../utils/shapiroWilk';
 import { defaultSortFunction } from '../../utils/sortFunctions';
 import {
   tooltipBaseMean,
-  tooltipDifferenceSize,
   tooltipMedianDiff,
   tooltipNewMean,
   tooltipSignificance,
@@ -164,19 +162,13 @@ export function formatMedianDiffPct(pct: number): string {
   return `${pct >= 0 ? '+' : ''}${pct.toFixed(2)}%`;
 }
 
-// Plain-language "Difference Size" cell — the Cliff's Delta interpretation
-// (negligible/small/medium/large). Shared by the main and subtests rows so
-// they render identically.
-function renderDifferenceSizeCell(interpretation: string) {
-  return (
-    <div className='difference-size cell' role='cell'>
-      {interpretation ? capitalize(interpretation) : '-'}
-    </div>
-  );
-}
-
+// Status cell: the direction of change (Improvement/Regression/No change),
+// with the Cliff's Delta interpretation (negligible/small/medium/large) shown
+// beneath it as the plain-language size of the difference. Shared by the main
+// and subtests rows so they render identically.
 function renderStatusCell(
   directionOfChange: MannWhitneyResultsItem['direction_of_change'],
+  cliffsInterpretation: string,
 ) {
   const isImprovement = directionOfChange === 'improvement';
   const isRegression = directionOfChange === 'regression';
@@ -184,20 +176,38 @@ function renderStatusCell(
     <div className='status cell' role='cell'>
       <Box
         sx={{
-          bgcolor: isImprovement
-            ? 'status.improvement'
-            : isRegression
-              ? 'status.regression'
-              : 'none',
+          display: 'flex',
+          flexDirection: 'column',
+          alignItems: 'center',
+          gap: 0.25,
         }}
-        className={`status-hint ${determineStatusHintClass(
-          isImprovement,
-          isRegression,
-        )}`}
       >
-        {isImprovement ? <ThumbUpIcon color='success' /> : null}
-        {isRegression ? <ThumbDownIcon color='error' /> : null}
-        {capitalize(directionOfChange ?? '')}
+        <Box
+          sx={{
+            bgcolor: isImprovement
+              ? 'status.improvement'
+              : isRegression
+                ? 'status.regression'
+                : 'none',
+          }}
+          className={`status-hint ${determineStatusHintClass(
+            isImprovement,
+            isRegression,
+          )}`}
+        >
+          {isImprovement ? <ThumbUpIcon color='success' /> : null}
+          {isRegression ? <ThumbDownIcon color='error' /> : null}
+          {capitalize(directionOfChange ?? '')}
+        </Box>
+        {cliffsInterpretation ? (
+          <Box
+            component='span'
+            className='difference-size'
+            sx={{ fontSize: 14, color: 'text.secondary' }}
+          >
+            {capitalize(cliffsInterpretation)}
+          </Box>
+        ) : null}
       </Box>
     </div>
   );
@@ -313,32 +323,9 @@ export const mannWhitneyStrategy = {
         },
         tooltip: tooltipStatusMannWhitney,
       },
-      // Plain-language size of the difference (the Cliff's Delta
-      // interpretation: negligible/small/medium/large). Simplified view only.
-      // Sorted by the magnitude of Cliff's Delta, which is what the buckets
-      // derive from, so the order matches the labels.
-      ...(!showAdvancedColumns
-        ? [
-            {
-              name: 'Difference Size',
-              key: 'difference-size',
-              gridWidth: '1fr',
-              sortFunction(
-                resultA: MannWhitneyResultsItem,
-                resultB: MannWhitneyResultsItem,
-              ) {
-                return (
-                  Math.abs(resultA.cliffs_delta) -
-                  Math.abs(resultB.cliffs_delta)
-                );
-              },
-              tooltip: tooltipDifferenceSize,
-            },
-          ]
-        : []),
-      // Advanced (power-user) columns — hidden in the simplified view. Kept in
-      // sync with the matching cells in renderColumns/renderSubtestColumns,
-      // which gate on the same showAdvancedColumns flag.
+      // Advanced (power-user) columns — CD and CLES are hidden in the
+      // simplified view. Kept in sync with the matching cells in
+      // renderColumns/renderSubtestColumns, which gate on the same flag.
       ...(showAdvancedColumns
         ? [
             {
@@ -371,42 +358,37 @@ export const mannWhitneyStrategy = {
               },
               tooltip: tooltipEffectSize,
             },
-            {
-              name: 'Sig',
-              key: 'significance',
-              filter: true,
-              gridWidth: '1.25fr',
-              tooltip: tooltipSignificance,
-              possibleValues: [
-                {
-                  label: 'Significant',
-                  key: 'significant',
-                  icon: <KeyboardDoubleArrowUpIcon fontSize='small' />,
-                },
-                {
-                  label: 'Not Significant',
-                  key: 'not significant',
-                  icon: <div>-</div>,
-                },
-              ],
-              matchesFunction(
-                result: MannWhitneyResultsItem,
-                valueKey: string,
-              ) {
-                return result.mann_whitney_test?.interpretation === valueKey;
-              },
-              sortFunction(
-                resultA: MannWhitneyResultsItem,
-                resultB: MannWhitneyResultsItem,
-              ) {
-                return (
-                  Math.abs(resultA.mann_whitney_test?.pvalue ?? 0) -
-                  Math.abs(resultB.mann_whitney_test?.pvalue ?? 0)
-                );
-              },
-            },
           ]
         : []),
+      // Significance is shown in both the simplified and advanced views. The
+      // full "Significance" label fits the roomier simplified view; in the
+      // advanced view the extra CD/CLES columns crowd it, so abbreviate to
+      // "Sig" to avoid the header overflowing into "Total Trials".
+      {
+        name: showAdvancedColumns ? 'Sig' : 'Significance',
+        key: 'significance',
+        filter: true,
+        gridWidth: '1.25fr',
+        tooltip: tooltipSignificance,
+        possibleValues: [
+          // Plain-language labels matching the cell text; the keys still map to
+          // the backend's "significant" / "not significant" interpretation.
+          { label: 'Real', key: 'significant' },
+          { label: 'Noise', key: 'not significant' },
+        ],
+        matchesFunction(result: MannWhitneyResultsItem, valueKey: string) {
+          return result.mann_whitney_test?.interpretation === valueKey;
+        },
+        sortFunction(
+          resultA: MannWhitneyResultsItem,
+          resultB: MannWhitneyResultsItem,
+        ) {
+          return (
+            Math.abs(resultA.mann_whitney_test?.pvalue ?? 0) -
+            Math.abs(resultB.mann_whitney_test?.pvalue ?? 0)
+          );
+        },
+      },
 
       {
         name: 'Total Trials',
@@ -470,9 +452,7 @@ export const mannWhitneyStrategy = {
           )}
         </div>
         {renderMedianDiffCell(result as MannWhitneyResultsItem)}
-        {renderStatusCell(direction_of_change)}
-        {!showAdvancedColumns &&
-          renderDifferenceSizeCell(cliffs_interpretation)}
+        {renderStatusCell(direction_of_change, cliffs_interpretation)}
         {showAdvancedColumns && (
           <>
             <div className='delta cell' role='cell'>
@@ -483,15 +463,15 @@ export const mannWhitneyStrategy = {
             <div className='effects cell' role='cell'>
               {clesVal ? `${clesVal}% ` : '-'}
             </div>
-            <div className='significance cell' role='cell'>
-              {mann_whitney_test?.interpretation === 'significant' ? (
-                <KeyboardDoubleArrowUpIcon fontSize='small' />
-              ) : (
-                '-'
-              )}
-            </div>
           </>
         )}
+        <div className='significance cell' role='cell'>
+          {mann_whitney_test?.interpretation === 'significant'
+            ? 'Real'
+            : mann_whitney_test?.interpretation === 'not significant'
+              ? 'Noise'
+              : '-'}
+        </div>
       </>
     );
   },
@@ -608,9 +588,7 @@ export const mannWhitneyStrategy = {
     return (
       <>
         {renderMedianDiffCell(mwResult)}
-        {renderStatusCell(direction_of_change)}
-        {!showAdvancedColumns &&
-          renderDifferenceSizeCell(cliffs_interpretation)}
+        {renderStatusCell(direction_of_change, cliffs_interpretation)}
         {showAdvancedColumns && (
           <>
             <div className='delta cell' role='cell'>
@@ -619,15 +597,15 @@ export const mannWhitneyStrategy = {
             <div className='effects cell' role='cell'>
               {clesValue}
             </div>
-            <div className='significance cell' role='cell'>
-              {mann_whitney_test?.interpretation === 'significant' ? (
-                <KeyboardDoubleArrowUpIcon fontSize='small' />
-              ) : (
-                '-'
-              )}
-            </div>
           </>
         )}
+        <div className='significance cell' role='cell'>
+          {mann_whitney_test?.interpretation === 'significant'
+            ? 'Real'
+            : mann_whitney_test?.interpretation === 'not significant'
+              ? 'Noise'
+              : '-'}
+        </div>
       </>
     );
   },
diff --git a/src/components/CompareResults/HowToReadResults.tsx b/src/components/CompareResults/HowToReadResults.tsx
index fc8b98a80..c97fe6391 100644
--- a/src/components/CompareResults/HowToReadResults.tsx
+++ b/src/components/CompareResults/HowToReadResults.tsx
@@ -47,15 +47,16 @@ function HowToReadResults() {
         <li>
           <strong>Status</strong> says whether the change is an{' '}
           <strong>Improvement</strong>, a <strong>Regression</strong>, or{' '}
-          <strong>No change</strong>.
+          <strong>No change</strong> — with the size of the difference
+          (negligible, small, medium, or large) shown beneath it.
         </li>
         <li>
-          <strong>Difference Size</strong> says how big the difference is:
-          negligible, small, medium, or large.
+          <strong>Sig</strong> shows whether the difference is statistically
+          significant (an arrow) or not (a dash).
         </li>
         <li>
           Tick <strong>Advanced columns</strong> to add the expert stats
-          (Cliff&apos;s Delta, CLES, Significance).
+          (Cliff&apos;s Delta and CLES).
         </li>
       </Box>
     </Alert>

From 0ee7631cb7090d8c81137d2d7315d26663dc9c56 Mon Sep 17 00:00:00 2001
From: Carla Severe <csevere@mozilla.com>
Date: Fri, 24 Jul 2026 16:54:33 -0700
Subject: [PATCH 6/6] update how to read the results

---
 .../__snapshots__/ResultsTable.test.tsx.snap  | 24 +++++++++++++++----
 .../CompareResults/HowToReadResults.tsx       |  5 ++--
 2 files changed, 23 insertions(+), 6 deletions(-)

diff --git a/src/__tests__/CompareResults/__snapshots__/ResultsTable.test.tsx.snap b/src/__tests__/CompareResults/__snapshots__/ResultsTable.test.tsx.snap
index 21132c962..3cc7f4df5 100644
--- a/src/__tests__/CompareResults/__snapshots__/ResultsTable.test.tsx.snap
+++ b/src/__tests__/CompareResults/__snapshots__/ResultsTable.test.tsx.snap
@@ -1059,9 +1059,17 @@ exports[`Results Table Should match snapshot 1`] = `
                   </li>
                   <li>
                     <strong>
-                      Sig
+                      Significance
                     </strong>
-                     shows whether the difference is statistically significant (an arrow) or not (a dash).
+                     tells you whether the difference is likely a 
+                    <strong>
+                      Real
+                    </strong>
+                     change or just 
+                    <strong>
+                      Noise 
+                    </strong>
+                    (random run-to-run variation).
                   </li>
                   <li>
                     Tick 
@@ -4035,9 +4043,17 @@ exports[`Results Table for MannWhitneyResultsItem for mann-whitney-u testVersion
                   </li>
                   <li>
                     <strong>
-                      Sig
+                      Significance
+                    </strong>
+                     tells you whether the difference is likely a 
+                    <strong>
+                      Real
+                    </strong>
+                     change or just 
+                    <strong>
+                      Noise 
                     </strong>
-                     shows whether the difference is statistically significant (an arrow) or not (a dash).
+                    (random run-to-run variation).
                   </li>
                   <li>
                     Tick 
diff --git a/src/components/CompareResults/HowToReadResults.tsx b/src/components/CompareResults/HowToReadResults.tsx
index c97fe6391..7a79914b7 100644
--- a/src/components/CompareResults/HowToReadResults.tsx
+++ b/src/components/CompareResults/HowToReadResults.tsx
@@ -51,8 +51,9 @@ function HowToReadResults() {
           (negligible, small, medium, or large) shown beneath it.
         </li>
         <li>
-          <strong>Sig</strong> shows whether the difference is statistically
-          significant (an arrow) or not (a dash).
+          <strong>Significance</strong> tells you whether the difference is
+          likely a <strong>Real</strong> change or just <strong>Noise </strong>
+          (random run-to-run variation).
         </li>
         <li>
           Tick <strong>Advanced columns</strong> to add the expert stats