A Comparison of Parameter Recovery Using Different Computer Programs and the Latent Trait Models R Package in Estimating the Graded Response Model

• In Event: Advances in Item Response Theory Estimation

Abstract

Accurate recovery of model parameters from response data is a central problem in item response theory (IRT). A prime concern in applying these IRT software packages is how well these programs can recover item and person parameters. Little research exists in the literature on comparisons between newly developed IRT software packages (e.g., IRTPRO, ‘ltm’ package) and the present study is intended to fill the gap by conducting a comprehensive simulation study to evaluate the performance of various IRT software packages for the parameter recovery.

Authors

• Tianshu Pan, Pearson

• Ou Zhang, Pearson