catIrt: An R Package for Simulating 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 with various item selection methods, ability estimation methods, and termination criteria.

Version: 0.4-1
Depends: R (≥ 2.11.0), numDeriv (≥ 2012.3-1), sfsmisc (≥ 1.0-14), stats
Suggests: irtoys, ltm, catR
Published: 2013-05-31
Author: Steven W. Nydick
Maintainer: Steven W. Nydick <nydic001 at>
License: GPL-2 | GPL-3 [expanded from: GPL (≥ 2)]
NeedsCompilation: yes
Materials: NEWS
CRAN checks: catIrt results


Reference manual: catIrt.pdf
Package source: catIrt_0.4-1.tar.gz
OS X binary: catIrt_0.4-1.tgz
Windows binary:
Old sources: catIrt archive