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Evaluation & the Health Professions
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What's this?

Item Response Theory and its Applications to Patient-Reported Outcomes Measurement

Chih-Hung Chang

Feinberg School of Medicine, Northwestern University

Bryce B. Reeve

National Cancer Institute

This article provides an overview of item response theory (IRT) models and how they can be appropriately applied to patient-reported outcomes (PROs) measurement. Specifically, the following topics are discussed: (a) basics of IRT, (b) types of IRT models, (c) how IRT models have been applied to date, and (d) new directions in applying IRT to PRO measurements.

Key Words: item response theory • health • outcomes • assessment • computerized adaptive testing

Evaluation & the Health Professions, Vol. 28, No. 3, 264-282 (2005)
DOI: 10.1177/0163278705278275
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