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MLCIRTwithin: Latent Class Item Response Theory (LC-IRT) Models under Within-Item Multidimensionality

Framework for the Item Response Theory analysis of dichotomous and ordinal polytomous outcomes under the assumption of within-item multidimensionality and discreteness of the latent traits. The fitting algorithms allow for missing responses and for different item parametrizations and are based on the Expectation-Maximization paradigm. Individual covariates affecting the class weights may be included in the new version together with possibility of constraints on all model parameters.

Version: 2.1.2
Depends: R (≥ 2.0.0), MASS, limSolve, MultiLCIRT
Published: 2025-06-28
DOI: 10.32614/CRAN.package.MLCIRTwithin
Author: Francesco Bartolucci [aut, cre], Silvia Bacci [aut]
Maintainer: Francesco Bartolucci <francesco.bartolucci at unipg.it>
License: GPL-2 | GPL-3 [expanded from: GPL (≥ 2)]
NeedsCompilation: no
In views: MissingData, Psychometrics
CRAN checks: MLCIRTwithin results

Documentation:

Reference manual: MLCIRTwithin.pdf

Downloads:

Package source: MLCIRTwithin_2.1.2.tar.gz
Windows binaries: r-devel: MLCIRTwithin_2.1.2.zip, r-release: MLCIRTwithin_2.1.2.zip, r-oldrel: MLCIRTwithin_2.1.2.zip
macOS binaries: r-release (arm64): not available, r-oldrel (arm64): not available, r-release (x86_64): MLCIRTwithin_2.1.2.tgz, r-oldrel (x86_64): MLCIRTwithin_2.1.2.tgz
Old sources: MLCIRTwithin archive

Linking:

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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.