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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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Devising the items

Devising the items

(p.17) Chapter 3 Devising the items
Health Measurement Scales

David L. Streiner

Geoffrey R. Norman

Oxford University Press

This chapter discusses the various sources of items for constructing scales: focus groups, interviews with patients and clinicians, clinical observation, theory, research, and expert opinion. It then discusses content validity, ensuring that the scale covers all aspects of the domain and does not include irrelevant content. Issues around generic or disease specific quality of life scales (the ‘fidelity versus bandwidth’ problem) are explored. The chapter concludes with a description of the goals and methods of translating scales into different chapters.

Keywords:   scale construction, content validity, generic, disease-specific, translation, conceptual equivalence

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