eRm

Author: Patrick Mair, Reinhold Hatzinger, Marco J. Maier
Contact: https://cran.r-project.org/web/packages/eRm/index.html
Description: 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, Ponocny's exact tests, 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.
Analyses: Person Fit/Cheating
System Requirements: Windows, Linux or Mac
Measurement Model: Rasch
License Type: Open-Source (R)
Documentation: Mair, P., & Hatzinger, R. (2007). Journal of Stati