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The Degree of Dependence between Multiple-Treatment Effect Sizes
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Kim, Rae-Seon; Becker, Betsy Jane – Multivariate Behavioral Research, 2010
We examined the degree of dependence between standardized-mean-difference effect sizes in multiple-treatment studies in meta-analysis in terms of the correlation formula provided by Gleser and Olkin (1994). To explore the impact of group size and the values of the true multiple-treatment effect sizes, we simplified the formula for the correlation…
Descriptors: Effect Size, Meta Analysis, Correlation, Control Groups
Testing Multivariate Effect Sizes in Multiple-Endpoint Studies.
Peer reviewed Peer reviewed
Timm, Neil H. – Multivariate Behavioral Research, 1999
Investigates the equality of "p" correlated effect sizes for "k" independent studies in which treatment and control groups are compared using Hotelling's "T" statistic. Illustrates the procedure and discusses the importance of sample size. (SLD)
Descriptors: Comparative Analysis, Control Groups, Correlation, Effect Size