psychomix: Psychometric Mixture Models

Psychometric mixture models based on 'flexmix' infrastructure. At the moment Rasch mixture models with different parameterizations of the score distribution (saturated vs. mean/variance specification), Bradley-Terry mixture models, and MPT mixture models are implemented. These mixture models can be estimated with or without concomitant variables. See vignette('raschmix', package = 'psychomix') for details on the Rasch mixture models.

Version: 1.1-8
Depends: R (≥ 2.10.0), flexmix (≥ 2.3-7), psychotools (≥ 0.4-2)
Imports: graphics, methods, stats, lattice, Formula (≥ 1.1-0), modeltools
Suggests: effects, lmtest, nnet, numDeriv
Published: 2020-01-30
DOI: 10.32614/CRAN.package.psychomix
Author: Hannah Frick ORCID iD [aut, cre], Friedrich Leisch [aut], Carolin Strobl [aut], Florian Wickelmaier [aut], Achim Zeileis ORCID iD [aut]
Maintainer: Hannah Frick <hannah.frick at>
License: GPL-2 | GPL-3
NeedsCompilation: no
Citation: psychomix citation info
Materials: NEWS
In views: Cluster, Psychometrics
CRAN checks: psychomix results


Reference manual: psychomix.pdf
Vignettes: Flexible Rasch Mixture Models with Package psychomix
Rasch Mixture Models for DIF Detection: A Comparison of Old and New Score Specifications


Package source: psychomix_1.1-8.tar.gz
Windows binaries: r-devel:, r-release:, r-oldrel:
macOS binaries: r-release (arm64): psychomix_1.1-8.tgz, r-oldrel (arm64): psychomix_1.1-8.tgz, r-release (x86_64): psychomix_1.1-8.tgz, r-oldrel (x86_64): psychomix_1.1-8.tgz
Old sources: psychomix archive


Please use the canonical form to link to this page.