ltm: Latent Trait Models under IRT

Analysis of multivariate dichotomous and polytomous data using latent trait models under the Item Response Theory approach. It includes the Rasch, the Two-Parameter Logistic, the Birnbaum's Three-Parameter, the Graded Response, and the Generalized Partial Credit Models.

Version: 0.9-7
Depends: R (≥ 2.11.0), MASS, msm, mvtnorm, polycor
Published: 2011-10-18
Author: Dimitris Rizopoulos
Maintainer: Dimitris Rizopoulos <d.rizopoulos at erasmusmc.nl>
License: GPL (≥ 2)
URL: http://rwiki.sciviews.org/doku.php?id=packages:cran:ltm
Citation: ltm citation info
In views: Multivariate, Psychometrics, SocialSciences
CRAN checks: ltm results

Downloads:

Package source: ltm_0.9-7.tar.gz
MacOS X binary: ltm_0.9-7.tgz
Windows binary: ltm_0.9-7.zip
Reference manual: ltm.pdf
News/ChangeLog:NEWS
Old sources: ltm archive

Reverse dependencies:

Reverse depends: difR, irtoys, lordif, pcaPA
Reverse suggests: latdiag