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Health Measurement ScalesA practical guide to their development and use$
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David L. Streiner and Geoffrey R. Norman

Print publication date: 2008

Print ISBN-13: 9780199231881

Published to Oxford Scholarship Online: September 2009

DOI: 10.1093/acprof:oso/9780199231881.001.0001

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Item response theory

Item response theory

(p.299) Chapter 12 Item response theory
Health Measurement Scales

David L. Streiner

Geoffrey R. Norman

Oxford University Press

Item response theory (IRT) is a relatively new approach to developing scales. It promises to produce scales that are shorter than those developed using traditional methods, but that are equally discriminating. With some models, the resulting scales have interval-scale properties. This chapter introduces the basic concepts and techniques of IRT, and discusses its advantages and limitations.

Keywords:   IRT, item response theory, scales, traditional methods, limitations

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