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Applied Psychological Measurement
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What's this?

A Comparison of Three Linear Equating Methods for the Common-Item Nonequivalent-Populations Design

David J. Woodruff

American College Testing Program

Three linear equating methods for the common-item nonequivalent-populations design are compared using an analytical method. The analysis investigated the be havior of the three methods when the true-score corre lation between the test and anchor was less than unity, a situation that may occur in practice. The analysis is graphically illustrated using data from a test equating situation. Conclusions derived from the analysis have implications for the practical application of these equating methods.

Key Words: Index terms: congeneric model, Levine equating method • linear equating • Tucker equating method.

Applied Psychological Measurement, Vol. 13, No. 3, 257-262 (1989)
DOI: 10.1177/014662168901300305
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[Abstract]