Package: diffIRT Type: Package Title: Diffusion IRT Models for Response and Response Time Data Version: 1.5 Date: 2015-08-13 Author: Dylan Molenaar Maintainer: Dylan Molenaar Depends: statmod Description: 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. License: GPL-2 NeedsCompilation: yes Packaged: 2026-07-14 08:46:40 UTC; root Repository: https://cran.r-universe.dev Date/Publication: 2015-08-13 00:00:00 UTC RemoteUrl: https://github.com/cran/diffIRT RemoteRef: HEAD RemoteSha: 334262ac52fd65cfc62df38fedefbc9cbc5e5132