3/6 CAT item parameters for all five languages, exported from the R API - #619
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3/6 CAT item parameters for all five languages, exported from the R API#619mcfrank wants to merge 1 commit into
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Exports the 2PL item banks from langcog/cdi-cat-api's combined_CAT_parms.Rdata into the existing webcdi CSV format (classic-b difficulty = -d/a1, matching [English_CAT].csv, which reproduces the R values to 1e-14). Adds the missing Japanese and Dutch starting-words files and refreshes the stale French one; instruments.json now points each CAT language at its own item bank instead of the English placeholder. Dutch parameters are derived from the model object (coef(irt_models$NL)) rather than the repo's irt_coefs table, which comes from a different fit — see langcog/cdi-cat-api#14. Every language was validated against freshly generated mirtCAT ground-truth sequences: theta trajectories match jsCat within 0.0024 at all 256 steps and maximum-information item selection matches 246/246. These CSVs are data-only today (07_populate_cat_items has been dead since the InstrumentItem model was removed in migration 0075); they are the canonical source for the upcoming in-browser jsCat CAT. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This was referenced Jul 9, 2026
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Part of the six-PR stack (merge after #618).
Ports the 2PL item banks from langcog/cdi-cat-api's
combined_CAT_parms.Rdatainto the existing webcdi CSV format (classic-b difficulty = -d/a1; reproduces the R values to 1e-14 on the English bank). Adds the missing Japanese/Dutch starting-words files, refreshes the stale French one, and points each CAT language'sinstruments.jsonentry at its own bank instead of the English placeholder.Dutch is exported from the model object rather than the repo's coefs table, which comes from a different fit — see langcog/cdi-cat-api#14.
Validation: all five languages replay freshly generated mirtCAT ground-truth sequences with theta within 0.0024 and item selection matching 246/246 (harness ships in PR 6/6).
🤖 Generated with Claude Code