sirt: Supplementary Item Response Theory Models

Supplementary item response theory models to complement existing functions in R, including multidimensional compensatory and noncompensatory IRT models, MCMC for hierarchical IRT models and testlet models, NOHARM, faceted and hierarchical rater models, ordinal IRT model (ISOP), latent regression models, DETECT statistic, local structural equation modeling (LSEM).

Version: 1.8-9
Depends: R (≥ 2.15.0), TAM, CDM
Imports: stats, graphics, utils, Rcpp, mirt, lavaan, qgraph, semPlot, combinat, ic.infer, sfsmisc, sm, psych, pbivnorm, gtools, igraph, coda, mvtnorm, MASS, Matrix, lavaan.survey, survey
LinkingTo: Rcpp, RcppArmadillo
Suggests: miceadds
Published: 2015-06-29
Author: Alexander Robitzsch [aut,cre]
Maintainer: Alexander Robitzsch <a.robitzsch at>
License: GPL-2 | GPL-3 [expanded from: GPL (≥ 2)]
NeedsCompilation: yes
Materials: NEWS
In views: Psychometrics
CRAN checks: sirt results


Reference manual: sirt.pdf
Package source: sirt_1.8-9.tar.gz
Windows binaries: r-devel:, r-release:, r-oldrel:
OS X Snow Leopard binaries: r-release: sirt_1.8-9.tgz, r-oldrel: sirt_1.5-0.tgz
OS X Mavericks binaries: r-release: sirt_1.8-9.tgz
Old sources: sirt archive

Reverse dependencies:

Reverse imports: immer, miceadds
Reverse suggests: CDM, mirt, TAM