D3mirt: Descriptive 3D Multidimensional Item Response Theory Modeling
For identifying, estimating, and plotting descriptive multidimensional item response theory models, restricted to 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: | 2.0.5 |
| Depends: | R (≥ 3.6.0) |
| Imports: | mirt, rgl (≥ 1.3.1) |
| Suggests: | knitr, rmarkdown, stats, testthat, R.rsp |
| Published: | 2026-06-07 |
| DOI: | 10.32614/CRAN.package.D3mirt |
| Author: | Erik Forsberg 
[aut, cre, cph] |
| Maintainer: | Erik Forsberg <forsbergpsychometrics at gmail.com> |
| BugReports: | https://github.com/ForsbergPyschometrics/D3mirt/issues |
| License: | GPL (≥ 3) |
| URL: | https://github.com/ForsbergPyschometrics/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_2.0.5.tar.gz |
| Windows binaries: | r-devel: D3mirt_2.0.5.zip, r-release: D3mirt_2.0.4.zip, r-oldrel: D3mirt_2.0.5.zip |
| macOS binaries: | r-release (arm64): D3mirt_2.0.5.tgz, r-oldrel (arm64): D3mirt_2.0.5.tgz, r-release (x86_64): D3mirt_2.0.5.tgz, r-oldrel (x86_64): D3mirt_2.0.5.tgz |
| Old sources: | D3mirt archive |
Linking:
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