Software Corner: RKWard: IRT analyses and person scoring with ITM

Article appearing in Shiken 17.2 (December 2013) pp. 13-22.

Author: Aaron Olaf Batty
Keio University
Lancaster University

Opening paragraph:
In SRB 16(2), I introduced the ever-improving, free and open-source RKWard GUI for the free and open-source R statistical package (Batty, 2012). In this issue, I will detail how to conduct IRT analyses from RKward’s drop-down interface using ltm, a flexible R package for unidimensional item response models. This allows users to get many of the important features of commercial software packages such as Xcalibur and IRTPro for free, and with a user-friendly interface.

Download full article (PDF)