Item Response Theory Modeling and Scoring for Judgment Data

Psychometric analysis and scoring of judgment data using polytomous Item-Response Theory (IRT) models, as described in Myszkowski and Storme (2018) . A convenience function is used to automatically compare and select models, as well as to present a variety of model-based statistics. Plotting functions are used to present category curves, as well as information, reliability and standard error functions.


Reference manual

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1.0.0 by Nils Myszkowski, a month ago

Browse source code at

Authors: Nils Myszkowski [aut, cre]

Documentation:   PDF Manual  

GPL-3 license

Imports mirt, psych, irr, methods, utils, stats, dplyr, tidyr, ggplot2, ggsci

Depends on directlabels

Suggests knitr, rmarkdown

See at CRAN