eRm: Extended Rasch Modeling

eRm fits Rasch models (RM), linear logistic test models (LLTM), rating scale model (RSM), linear rating scale models (LRSM), partial credit models (PCM), and linear partial credit models (LPCM). Missing values are allowed in the data matrix. Additional features are the ML estimation of the person parameters, Andersen's LR-test, item-specific Wald test, itemfit and personfit statistics including infit and outfit measures, various ICC and related plots, automated stepwise item elimination, simulation module for various binary data matrices. An eRm platform is provided at R-forge (see URL).

Version: 0.10-2
Depends: R (≥ 2.7.0), gtools, splines, ROCR
Imports: graphics, stats, MASS
Published: 2009-03-06
Author: Patrick Mair, Reinhold Hatzinger
Maintainer: Patrick Mair <patrick.mair at wu-wien.ac.at>
License: GPL
URL: http://r-forge.r-project.org/projects/erm/
In views: Multivariate, Psychometrics
CRAN checks: eRm results

Downloads:

Package source: eRm_0.10-2.tar.gz
MacOS X binary: eRm_0.10-2.tgz
Windows binary: eRm_0.10-2.zip
Reference manual: eRm.pdf
Vignettes: eRm Basics
Old sources: eRm archive