Questionnaire discrimination: (re)-introducing coefficient <it>δ</it>
<p>Abstract</p> <p>Background</p> <p>Questionnaires are used routinely in clinical research to measure health status and quality of life. Questionnaire measurements are traditionally formally assessed by indices of reliability (the degree of measurement error) and valid...
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| Format: | Article |
| Language: | English |
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BMC
2007-05-01
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| Series: | BMC Medical Research Methodology |
| Online Access: | http://www.biomedcentral.com/1471-2288/7/19 |