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ERIC Number: EJ1021227
Record Type: Journal
Publication Date: 2014-Jan
Pages: 32
Abstractor: As Provided
ISSN: ISSN-0272-4316
Practical Guide to Conducting an Item Response Theory Analysis
Toland, Michael D.
Journal of Early Adolescence, v34 n1 p120-151 Jan 2014
Item response theory (IRT) is a psychometric technique used in the development, evaluation, improvement, and scoring of multi-item scales. This pedagogical article provides the necessary information needed to understand how to conduct, interpret, and report results from two commonly used ordered polytomous IRT models (Samejima's graded response [GR] model and reduced GR model). Throughout this article, simulated data from a multi-item scale is used to illustrate IRT analyses. The simulated data and IRTPRO version 2.1 point-and-click commands needed to reproduce all analyses in this article are available as supplemental online materials at The intent of this article is to provide an overview of essential components of an IRT analysis to enable increased access to this powerful tool for applied early adolescence researchers.
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Publication Type: Reports - Descriptive; Journal Articles
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A