Package: GMX
Type: Package
Title: Extended Graphical Model Checks for the Rasch Family of Models
Version: 0.9-3
Date: 2026-07-20
Authors@R: person(given  = c('Rainer', 'W.'),
                              family = 'Alexandrowicz',
                              role   = c('aut', 'cre'),
                              email  = 'rainer.alexandrowicz@aau.at') 
Description: 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'
        (Zeileis et al., 2026). 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. The function plotMLT() draws a graphical model
        check for the Martin-Loef-Test (MLT). If type='persons', it
        draws scatterplots of the person parameter estimates of each
        pair of item sub-groups. If type='items', it draws a
        scatterplot of the item/threshold parameter estimates of each
        of the two sub-groups vertically against the estimates of the
        total sample horizontally.
Depends: R (>= 3.0.0)
License: GPL (>= 3)
Imports: psychotools
Suggests: eRm
NeedsCompilation: no
Packaged: 2026-07-21 05:00:07 UTC; root
Author: Rainer W. Alexandrowicz [aut, cre]
Maintainer: Rainer W. Alexandrowicz <rainer.alexandrowicz@aau.at>
Repository: https://cran.r-universe.dev
Date/Publication: 2026-07-20 22:30:07 UTC
RemoteUrl: https://github.com/cran/GMX
RemoteRef: HEAD
RemoteSha: 8e353ebf9591e0bab4c50ea3a40afe1a54ad5d8a