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, Martin-Loef-Test, nonparametric Monte-Carlo Tests, itemfit and personfit statistics including infit and outfit measures, ICC and other plots, automated stepwise item elimination, simulation module for various binary data matrices.
Version: 1.0-10 Depends: R (≥ 3.5.0) Imports: graphics, grDevices, stats, methods, MASS, splines, Matrix, lattice, colorspace, psych Published: 2025-05-27 DOI: 10.32614/CRAN.package.eRm Author: Patrick Mair [cre, aut], Thomas Rusch [aut], Reinhold Hatzinger [aut], Marco J. Maier [aut], Rudolf Debelak [ctb] Maintainer: Patrick Mair <mair at fas.harvard.edu> License: GPL-3 NeedsCompilation: yes Citation: eRm citation info Materials: NEWS In views: MissingData, Psychometrics CRAN checks: eRm results Documentation: Downloads: Reverse dependencies: Linking:Please use the canonical form https://CRAN.R-project.org/package=eRm to link to this page.
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