diffIRT: Diffusion IRT Models for Response and Response Time Data

Package to fit diffusion-based IRT models to response and response time data. Models are fit using marginal maximum likelihood. Parameter restrictions (fixed value and equality constraints) are possible. In addition, factor scores (person drift rate and person boundary separation) can be estimated. Model fit assessment tools are also available. The traditional diffusion model can be estimated as well.

AuthorDylan Molenaar
Date of publication2015-08-14 00:20:21
MaintainerDylan Molenaar <d.molenaar@uva.nl>
LicenseGPL-2
Version1.5

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Files in this package

diffIRT
diffIRT/inst
diffIRT/inst/CITATION
diffIRT/src
diffIRT/src/diffIRT.c
diffIRT/NAMESPACE
diffIRT/data
diffIRT/data/brightness.rda
diffIRT/data/rotation.rda
diffIRT/data/extraversion.rda
diffIRT/R
diffIRT/R/coef.diffIRT.r
diffIRT/R/mdiffIRT.r
diffIRT/R/fitObs.r
diffIRT/R/logLik.diffIRT.r
diffIRT/R/fitCumChoose.r
diffIRT/R/qdiffIRT.r
diffIRT/R/anova.diffIRT.r
diffIRT/R/likelihood.r
diffIRT/R/RespFit.r
diffIRT/R/fitOrders.r
diffIRT/R/simdiffT.r
diffIRT/R/calcSubjLL.r
diffIRT/R/calcEZ.r
diffIRT/R/print.diffIRT.r
diffIRT/R/nobs.diffIRT.r
diffIRT/R/print.RespFit.r
diffIRT/R/vcov.diffIRT.r
diffIRT/R/summary.diffIRT.r
diffIRT/R/QQdiff.r
diffIRT/R/fitDeriv.r
diffIRT/R/LLscoreVd.r
diffIRT/R/fitItems.r
diffIRT/R/get.start.r
diffIRT/R/fitPred.r
diffIRT/R/deriv.r
diffIRT/R/simdiff.r
diffIRT/R/diffIRT.r
diffIRT/R/LLscoreA.r
diffIRT/R/LLscoreVq.r
diffIRT/R/summary.RespFit.r
diffIRT/R/pdiffIRT.r
diffIRT/R/factest.r
diffIRT/MD5
diffIRT/DESCRIPTION
diffIRT/man
diffIRT/man/diffIRT.Rd diffIRT/man/anova.Rd diffIRT/man/QQdiff.Rd diffIRT/man/brightness.Rd diffIRT/man/RespFit.Rd diffIRT/man/extraversion.Rd diffIRT/man/factest.Rd diffIRT/man/simdiffT.Rd diffIRT/man/rotation.Rd diffIRT/man/coef.Rd diffIRT/man/summary.Rd diffIRT/man/simdiff.Rd

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