Resolving Differences among Methods of Establishing Confidence Limits for Test Scores

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Abstract
Microcomputer scoring and interpretation systems are making it easier for psychologists to report confider -e limits for test scores. This paper focuses on the basic theory underlying confidence limits and presents reasons why psychologists should incorporate confidence ranges in their narrative reports. The paper also compares four methods for establishing confidence limits. In particular, the standard error of measurement procedure is compared to three lesser-known procedures that establish limits around an estimated true score. Equations are presented for calculating confidence limits, and recommendations are made for the appropriate application of such limits during psychodiagnostic evaluations.

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