hyunsooseol/snowIRT

This module includes Item Statistics, Model fit, Differential Item Functioning, Wright Map, Expected Scores Curve,and Item Characteristic Curve for DIF using MML estimation of the Rasch measurement model. Furthermore you can analyze DIF, Distractor analysis and Many facet Rasch model.

snowIRT

This package provides distractor analysis, item and person statistics, Model fit, Differential Item Functioning, Wright Map, Expected Score Curve, and Item Characteristic Curves for DIF using the Rasch measurement model.

• These anlalyses are described in the book; https://bookdown.org/dkatz/Rasch_Biome/

snowIRT module can be installed and used in R as a standard R packages.

Installation

At the moment, snowIRT is not in CRAN yet, so you need to install it via devtools

devtools::install_github("hyunsooseol/snowIRT")