regDIF: Regularized Differential Item Functioning

Performs regularization of differential item functioning (DIF) parameters in item response theory (IRT) models (Belzak & Bauer, 2020) <> using a penalized expectation-maximization algorithm.

Version: 1.1.1
Imports: stats (> 3.0.0), utils, statmod, parallel, foreach
Suggests: knitr, testthat (≥ 2.1.0), covr, rmarkdown
Published: 2024-02-23
DOI: 10.32614/CRAN.package.regDIF
Author: William Belzak
Maintainer: William Belzak <wbelzak at>
License: MIT + file LICENSE
NeedsCompilation: no
Citation: regDIF citation info
Materials: README NEWS
CRAN checks: regDIF results


Reference manual: regDIF.pdf
Vignettes: Getting started with regDIF


Package source: regDIF_1.1.1.tar.gz
Windows binaries: r-devel:, r-release:, r-oldrel:
macOS binaries: r-release (arm64): regDIF_1.1.1.tgz, r-oldrel (arm64): regDIF_1.1.1.tgz, r-release (x86_64): regDIF_1.1.1.tgz, r-oldrel (x86_64): regDIF_1.1.1.tgz
Old sources: regDIF archive


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