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.

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JALT is the Japan Association for Language Teaching, a nonprofit organization dedicated to the improvement of language teaching and learning. The TEVAL SIG is a Special Interest Group of researchers within JALT who are interested in testing and the evaluation of language learning outcomes.

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