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The Incorporation of Empirical Item Difficulty Data into the Angoff Standard-Setting Procedure

American Association, of State Social Work Boards

This study represents an attempt at incorporating empirical item difficulty data into the Angoff standard-setting procedure without affecting the subjective judgment of the raters. The Raschmodel ability level corresponding to minimal competence was estimated for each of 536 items on the American Association of State Social Work Boards (AASSWB) social work licensure examinations from their empirical calibrations and Angoff ratings. The mean of these estimatesforall items on a given examination was taken as the level of minimal competence for the entire examination. This procedure yielded raw passing scores that were 4 to 6 items lower (out of 150) and pass rates that were 7% to 15% higherthan those obtained using the "standard" Angoffprocedure.

Evaluation & the Health Professions, Vol. 20, No. 4, 479-498 (1997)
DOI: 10.1177/016327879702000406


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