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Educational and Psychological Measurement
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A Reliability Generalization Study of the Self-Description Questionnaire

Lesley F. Leach

Robin K. Henson

Leslie R. Odom

Lynne S. Cagle

University of North Texas

The use of reliability generalization methodology promises to, among other things, inform researchers about the importance of reporting reliability coefficients and their use in result interpretation. This study presents results from a reliability generalization study of the Self-Description Questionnaire (SDQ). The average score reliabilities produced by the instrument as well as sample and instrument characteristics that may affect those reliabilities are presented. Results varied somewhat across the three SDQ instruments and their various subscales, but internal consistency estimates were generally strong for the SDQ.

Key Words: reliability generalization • RG • self-description questionnaire • SDQ • reliability

Educational and Psychological Measurement, Vol. 66, No. 2, 285-304 (2006)
DOI: 10.1177/0013164405284030
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