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.

Author | Dylan Molenaar |

Date of publication | 2015-08-14 00:20:21 |

Maintainer | Dylan Molenaar <d.molenaar@uva.nl> |

License | GPL-2 |

Version | 1.5 |

**anova:** Conduct a likelihood ratio test on two nested 'diffIRT'...

**brightness:** A Simulated Response Time Dataset according to an...

**coef:** Return estimated parameters

**diffIRT:** Fitting diffusion IRT models

**extraversion:** Responses and Response Times to 10 Extraversion Items

**factest:** Estimating factor scores for diffIRT models

**QQdiff:** Assessing diffIRT model fit for the response times using...

**RespFit:** Assessing diffIRT model fit for the responses using limited...

**rotation:** Responses and Response Times to 10 Mental Rotation Items

**simdiff:** Simulate data according to the D-diffusion or Q-diffusion IRT...

**simdiffT:** Simulate data according to the traditional diffusion model.

**summary:** Summary function for diffIRT objects

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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