Multidimensional Item Response Theory CRAN Task View: Psychometrics (http://CRAN.R-project.org/view=Psychometrics) Analysis of dichotomous and polychotomous response data using latent trait models under the Item Response Theory paradigm. Includes the multivariate two- and three-parameter logistic models, confirmatory bifactor analysis, polytomous exploratory and confirmatory item response models which may include polynomial or product constructed factors, and partially-compensatory item response modeling in conjunction with other IRT models. Software Depends: R (>= 2.14), stats4, lattice, MASS, methods Imports: stats4, psych, GPArotation, mvtnorm, Rcpp, plink, Matrix LinkingTo: Rcpp Suggests: plink Phil Chalmers <rphilip.chalmers@gmail.com> Phil Chalmers <rphilip.chalmers@gmail.com> GPL (>= 2) 2012-05-09 application/tgz http://CRAN.R-project.org/package=mirt