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Setting, Evaluating, and Maintaining Certification Standards with the Rasch Model

National Board of Medical Examiners, Philadelphia

Benjamin D. Wright

University of Chicago

Expert judgments about the ability of candidates were combined with expert judgments about the content of test items to arrive at a passing standardfor a test. This article describes how Rasch measurement can facilitate the use of the test content judgments in setting a standard. It also describes how Rasch measurement can then be used to evaluate and improve the precision of the standard and to hold it constant across time.

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