Reliability and Validity of Activity Measures in Preadolescent Girls

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Abstract
Nonobese, preadolescent girls self-reported, and their parents provided proxy reports of daughters’ daily activities using questionnaires. Responses were evaluated for test-retest reliability, and for validity using one-week diaries. Results indicated all three respondents provided reproducible estimates of time daughters spent watching TV; daughters and mothers, of time daughters spent sleeping; and parents, of time daughters spent in vigorous activities. However, only daughters >10 years of age could provide valid reports for time spent in moderate activities and in sedentary and light activities on school days. Study results suggest that daughters and parents have difficulty providing reliable and valid estimates of activity level.

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