catIrt: Simulate IRT-Based Computerized Adaptive Tests

Functions designed to simulate data that conform to basic unidimensional IRT models (for now 3-parameter binary response models and graded response models) along with Post-Hoc CAT simulations of those models given various item selection methods, ability estimation methods, and termination criteria. See Wainer (2000) <doi:10.4324/9781410605931>, van der Linden & Pashley (2010) <doi:10.1007/978-0-387-85461-8_1>, and Eggen (1999) <doi:10.1177/01466219922031365> for more details.

Version: 0.5.1
Depends: R (≥ 2.11.0), numDeriv (≥ 2012.3-1)
Suggests: irtoys, ltm, catR
Published: 2022-05-25
DOI: 10.32614/CRAN.package.catIrt
Author: Steven Nydick ORCID iD [cre, aut]
Maintainer: Steven Nydick <swnydick at>
License: GPL-2 | GPL-3 [expanded from: GPL (≥ 2)]
NeedsCompilation: yes
Materials: README NEWS
CRAN checks: catIrt results


Reference manual: catIrt.pdf


Package source: catIrt_0.5.1.tar.gz
Windows binaries: r-devel:, r-release:, r-oldrel:
macOS binaries: r-release (arm64): catIrt_0.5.1.tgz, r-oldrel (arm64): catIrt_0.5.1.tgz, r-release (x86_64): catIrt_0.5.1.tgz, r-oldrel (x86_64): catIrt_0.5.1.tgz
Old sources: catIrt archive

Reverse dependencies:

Reverse suggests: catSurv


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