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.

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

devtools::install_github("hyunsooseol/snowIRT")