psychotools: Infrastructure for Psychometric Modeling

Infrastructure for psychometric modeling such as data classes (for item response data and paired comparisons), basic model fitting functions (for Bradley-Terry, Rasch, partial credit, rating scale, multinomial processing tree models), extractor functions for different types of parameters (item, person, threshold, discrimination), unified inference and visualizations, and various datasets for illustration. Intended as a common lightweight and efficient toolbox for psychometric modeling and a common building block for fitting psychometric mixture models in package "psychomix" and psychometric tree models in package "psychotree".

Version: 0.4-0
Depends: R (≥ 2.10.0)
Imports: graphics, stats
Suggests: multcomp, Formula, likert
Published: 2015-01-20
Author: Achim Zeileis [aut, cre], Carolin Strobl [aut], Florian Wickelmaier [aut], Basil Abou El-Komboz [aut], Julia Kopf [aut]
Maintainer: Achim Zeileis <Achim.Zeileis at>
License: GPL-2 | GPL-3
NeedsCompilation: yes
Materials: NEWS
In views: Psychometrics
CRAN checks: psychotools results


Reference manual: psychotools.pdf
Package source: psychotools_0.4-0.tar.gz
Windows binaries: r-devel:, r-release:, r-oldrel:
OS X Snow Leopard binaries: r-release: psychotools_0.4-0.tgz, r-oldrel: psychotools_0.4-0.tgz
OS X Mavericks binaries: r-release: psychotools_0.4-0.tgz
Old sources: psychotools archive

Reverse dependencies:

Reverse depends: benchmark, psychomix, psychotree
Reverse suggests: ordBTL, partykit