Add WLE (Weighted Likelihood Estimation) as ability estimator#53
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ben-domingue wants to merge 1 commit into
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Add WLE (Weighted Likelihood Estimation) as ability estimator#53ben-domingue wants to merge 1 commit into
ben-domingue wants to merge 1 commit into
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Implements Warm (1989) bias-corrected MLE via the same Powell optimizer used by MLE. The WLE objective maximizes L(θ) + 0.5·ln I(θ), matching the formulation in mirt's fscores(method="WLE"). Validated against mirt on a 50-item Rasch simulation — estimates lie on the diagonal across the full theta range. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Summary
'WLE'(Warm 1989 Weighted Likelihood Estimation) as a third option for themethodparameter alongside'MLE'and'EAP'fscores(method="WLE")formulationChanges
src/cat.ts:estimateAbilityWLE()andnegWLEObjective()methods;'wle'added tovalidateMethod(); JSDoc updatedsrc/__tests__/cat.test.ts: 3 new tests (analytic anchor, bias-correction property, bounds/SE)README.md: WLE usage example added;new CAT(...)→new Cat(...)typo fixedvalidation/: newwle-simulation.jsscript, WLE section injsCAT-validation.Rmd, and validation plot (jsCAT_validation_3.png) showing jsCAT WLE vs mirt WLE on a 50-item Rasch simulationKnown pre-existing issue (not introduced by this PR)
stopping.test.tsfails to run with a syntax error injest-extended/pretty-formatdue to a Node version incompatibility (optional chaining?.requires Node ≥ 14). This failure exists onmainbefore this PR and is unrelated to the WLE changes.Test plan
npm test -- --testPathPattern=cat.test— all 87 tests passnpm run buildRscript /tmp/wle_validation.R— points lie on the diagonal vs mirt🤖 Generated with Claude Code