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Evaluation & the Health Professions
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The Precision of Practice Analysis Results in the Professions

Michael T. Kane

Tamara Miller

Malani Trine

Craig Becker

Karin Carson

University of Wisconsin-Madison

A practice analysis, in which an appropriate sample of professionals is asked to describe what they do in their practices, is considered an essentialpart of the content-related validity evidence for licensure and certification tests. This article examines the precision of estimates of the mean frequencies for categories of activities in an activity inventory administered on two occasions about 6 weeks apart. In particular, it explores the variability in estimates of the meanfrequenciesfor categories due to the sampling of respondents, activity statements, and occasions. The results suggest that samples of 200 respondents, about 10 to 20 activity statements per category, and one occasion are adequatefor estimating the mean frequency for each category.

Evaluation & the Health Professions, Vol. 18, No. 1, 29-50 (1995)
DOI: 10.1177/016327879501800103
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