psychomix: Psychometric Mixture Models

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

Version: 1.1-1
Depends: R (≥ 2.10.0), flexmix (≥ 2.3-7), psychotools (≥ 0.2-0)
Imports: graphics, methods, stats, lattice, Formula (≥ 1.1-0), modeltools
Suggests: effects, lmtest, mRm, nnet, numDeriv
Published: 2014-07-29
Author: Hannah Frick [aut, cre], Carolin Strobl [aut], Friedrich Leisch [aut], Achim Zeileis [aut]
Maintainer: Hannah Frick <Hannah.Frick at>
License: GPL-2
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_1.1-1.tar.gz
Windows binaries: r-devel:, r-release:, r-oldrel:
OS X Snow Leopard binaries: r-release: psychomix_1.1-1.tgz, r-oldrel: psychomix_1.1-1.tgz
OS X Mavericks binaries: r-release: psychomix_1.1-1.tgz
Old sources: psychomix archive

Reverse dependencies:

Reverse suggests: ordBTL