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Reliability of Composite Measurements Based on them Highest ofn Equivalent Components

University of South Carolina

Under the assumptions of classical measurement theory and the condition of normality, a formula is derived for the reliability of composite scores based onm highest ofn equivalent components. The formula represents an extension of the Spearman-Brown formula to the case of truncated data. The results of a simulation study indicate that errors encountered in the use of the said formula for projection purposes are confined largely to the second decimal.

Key Words: Reliability • composite scores • extreme observation

Journal of Educational and Behavioral Statistics, Vol. 11, No. 3, 225-238 (1986)
DOI: 10.3102/10769986011003225


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