psychotools: Psychometric Modeling Infrastructure

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 trees based on psychometric models in package "psychotree".

Version: 0.4-3
Depends: R (≥ 2.10.0)
Imports: graphics, grDevices, stats, utils
Suggests: Formula, likert, multcomp, sandwich
Published: 2018-05-17
Author: Achim Zeileis ORCID iD [aut, cre], Carolin Strobl [aut], Florian Wickelmaier [aut], Basil Komboz [aut], Julia Kopf [aut]
Maintainer: Achim Zeileis <Achim.Zeileis at>
License: GPL-2 | GPL-3
NeedsCompilation: yes
Citation: psychotools citation info
Materials: NEWS
In views: Psychometrics
CRAN checks: psychotools results


Reference manual: psychotools.pdf
Package source: psychotools_0.4-3.tar.gz
Windows binaries: r-devel:, r-release:, r-oldrel:
OS X binaries: r-release: psychotools_0.4-3.tgz, r-oldrel: psychotools_0.4-3.tgz
Old sources: psychotools archive

Reverse dependencies:

Reverse depends: psychomix, psychotree, RM.weights
Reverse imports: BTLLasso, immer, PlackettLuce
Reverse suggests: model4you, ordBTL, palmtree, partykit
Reverse enhances: qvcalc


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