Item Response Theory Modeling and Scoring for Judgment Data
Plot the category curves for a judge.
Object returned by the jrt function.
Fit ordinal IRT models on judgment data and return factor scores and s...
anova method for objects returned by the jrt function.
Plot the information function for a judge or for the entire set of jud...
Psychometric analysis and scoring of judgment data using polytomous Item-Response Theory (IRT) models, as described in Myszkowski and Storme (2019) <doi:10.1037/aca0000225> and Myszkowski (2021) <doi:10.1037/aca0000287>. A 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.