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Direct linkNugent, William R. – Educational and Psychological Measurement, 2006
One of the most important effect sizes used in meta-analysis is the standardized mean difference (SMD). In this article, the conditions under which SMD effect sizes based on different measures of the same construct are directly comparable are investigated. The results show that SMD effect sizes from different measures of the same construct are…
Descriptors: Effect Size, Meta Analysis, True Scores, Error of Measurement
Peer reviewedStokes, Elizabeth H.; And Others – Educational and Psychological Measurement, 1978
The Wechsler Intelligence Scale for Children, and the revised form of that measure, were administered to a sample of sixth grade pupils. Although the correlation between measures was high, scores on the revised form were significantly lower. (JKS)
Descriptors: Comparative Testing, Correlation, Error of Measurement, Grade 6
