GMX: Extended Graphical Model Checks for the Rasch Family of Models

The function plotLRT() draws pairwise graphical model checks for the Rasch Model (RM; Rasch, 1960), the Partial Credit Model(PCM; Masters, 1982), and the Rating Scale Model (RSM; Andrich, 1978) using the output object of eRm::LRtest(). The function cLRT() provides a conditional Likelihood Ratio Test (Andersen, 1973), using the routines of 'psychotools'. Users may choose to plot the threshold parameters, the cumulative thresholds, the average thresholds per item, or the person parameters. Extended coloring options allow for automated item-wise or threshold-wise coloring. For multi-group splits, all pairwise group comparisons are drawn automatically. For more details see Andersen (1973) <doi:10.1007/BF02291180>, Andrich (1978) <doi:10.1007/BF02293814>, Masters (1982) <doi:10.1007/BF02296272> and Rasch (1960, ISBN:9780598554512).

Version:	0.9-2
Depends:	R (≥ 3.0.0)
Imports:	psychotools
Suggests:	eRm
Published:	2026-03-10
DOI:	10.32614/CRAN.package.GMX (may not be active yet)
Author:	Rainer W. Alexandrowicz [aut, cre]
Maintainer:	Rainer W. Alexandrowicz <rainer.alexandrowicz at aau.at>
License:	GPL (≥ 3)
NeedsCompilation:	no
Citation:	GMX citation info
Materials:	NEWS
CRAN checks:	GMX results

Documentation:

Reference manual:

GMX.html , GMX.pdf

Downloads:

Package source:	GMX_0.9-2.tar.gz
Windows binaries:	r-devel: not available, r-release: not available, r-oldrel: not available
macOS binaries:	r-release (arm64): not available, r-oldrel (arm64): not available, r-release (x86_64): GMX_0.9-2.tgz, r-oldrel (x86_64): not available

Linking:

Please use the canonical form https://CRAN.R-project.org/package=GMX to link to this page.