Using R for Item Response Theory

This workshop was delivered as guest lecture to a graduate level psychometrics course and provided an introduction to using R for Item Response Theory (IRT). Students learned how to estimate IRT model with both dichotomous and polytomous item responses using the {mirt} package. We also gave students the tools needed to explore and evaluate their estimated models. Along the way, we introduced several tidyverse packages including {dplyr} and {ggplot2}.