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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.
| Version: | 1.5 |
| Depends: | statmod |
| Published: | 2015-08-14 |
| DOI: | 10.32614/CRAN.package.diffIRT |
| Author: | Dylan Molenaar |
| Maintainer: | Dylan Molenaar <d.molenaar at uva.nl> |
| License: | GPL-2 |
| NeedsCompilation: | yes |
| Citation: | diffIRT citation info |
| CRAN checks: | diffIRT results |
| Reference manual: | diffIRT.pdf |
| Package source: | diffIRT_1.5.tar.gz |
| Windows binaries: | r-devel: diffIRT_1.5.zip, r-release: diffIRT_1.5.zip, r-oldrel: diffIRT_1.5.zip |
| macOS binaries: | r-release (arm64): diffIRT_1.5.tgz, r-oldrel (arm64): diffIRT_1.5.tgz, r-release (x86_64): diffIRT_1.5.tgz, r-oldrel (x86_64): diffIRT_1.5.tgz |
| Old sources: | diffIRT archive |
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These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.