The 'D3mirt' package is used 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 foremost explorative and centered around the plot function that exposes item characteristics and constructs, represented by vector arrows, located in a three-dimensional interactive space. The results can be useful for item-level analysis as well as test development.
|Depends:||mirt, R (≥ 3.5.0), rgl (≥ 1.0.1)|
|Suggests:||knitr, rmarkdown, stats|
|Author:||Erik Forsberg [aut, cre, cph]|
|Maintainer:||Erik Forsberg <forsbergpsychometrics at gmail.com>|
|License:||GPL (≥ 3)|
|Citation:||D3mirt citation info|
|CRAN checks:||D3mirt results|
Introduction to D3mirt Analysis
|Windows binaries:||r-devel: D3mirt_1.0.3.zip, r-release: D3mirt_1.0.3.zip, r-oldrel: D3mirt_1.0.3.zip|
|macOS binaries:||r-release (arm64): D3mirt_1.0.3.tgz, r-oldrel (arm64): D3mirt_1.0.3.tgz, r-release (x86_64): not available, r-oldrel (x86_64): D3mirt_1.0.3.tgz|
|Old sources:||D3mirt archive|
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