D3mirt: Descriptive 2D and 3D Descriptive Multidimensional Item Response Theory Modeling
For identifying, estimating, and plotting descriptive multidimensional item response theory models, restricted to 2D and 3D and dichotomous or polytomous data that fit the two-parameter logistic model or the graded response model. The method is primarily exploratory and centered on the plot function, which exposes item characteristics and constructs, represented by vector arrows, within a three-dimensional interactive latent space. The results can be useful for item-level analysis as well as test development.
| Version: | 2.1.0 |
| Depends: | R (≥ 3.6.0) |
| Imports: | mirt, rgl (≥ 1.3.1) |
| Suggests: | knitr, rmarkdown, stats, testthat, R.rsp |
| Published: | 2026-07-08 |
| DOI: | 10.32614/CRAN.package.D3mirt |
| Author: | Erik Forsberg 
[aut, cre, cph] |
| Maintainer: | Erik Forsberg <forsbergpsychometrics at gmail.com> |
| BugReports: | https://github.com/ForsbergPsychometrics/D3mirt/issues |
| License: | GPL (≥ 3) |
| URL: | https://github.com/ForsbergPsychometrics/D3mirt |
| NeedsCompilation: | no |
| Citation: | D3mirt citation info |
| Materials: | README, NEWS |
| In views: | Psychometrics |
| CRAN checks: | D3mirt results |
Documentation:
| Reference manual: | D3mirt.html , D3mirt.pdf |
| Vignettes: |
Introduction to D3mirt (source) |
Downloads:
| Package source: | D3mirt_2.1.0.tar.gz |
| Windows binaries: | r-devel: D3mirt_2.1.0.zip, r-release: D3mirt_2.1.0.zip, r-oldrel: D3mirt_2.1.0.zip |
| macOS binaries: | r-release (arm64): D3mirt_2.1.0.tgz, r-oldrel (arm64): D3mirt_2.1.0.tgz, r-release (x86_64): D3mirt_2.1.0.tgz, r-oldrel (x86_64): D3mirt_2.1.0.tgz |
| Old sources: | D3mirt archive |
Linking:
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