Please use this identifier to cite or link to this item: https://doi.org/10.3389/fpsyg.2018.01387
Title: Computing multivariate effect sizes and their sampling covariance matrices with structural equation modeling: Theory, examples, and computer simulations
Authors: Cheung M.W.-L. 
Keywords: Effect size
Meta-analysis
Multivariate effect size
Sampling covariance matrix
Structural equation model
Issue Date: 2018
Publisher: Frontiers Media S.A.
Citation: Cheung M.W.-L. (2018). Computing multivariate effect sizes and their sampling covariance matrices with structural equation modeling: Theory, examples, and computer simulations. Frontiers in Psychology 9 (AUG) : 1387. ScholarBank@NUS Repository. https://doi.org/10.3389/fpsyg.2018.01387
Abstract: In the social and behavioral sciences, it is recommended that effect sizes and their sampling variances be reported. Formulas for common effect sizes such as standardized and raw mean differences, correlation coefficients, and odds ratios are well known and have been well studied. However, the statistical properties of multivariate effect sizes have received less attention in the literature. This study shows how structural equation modeling (SEM) can be used to compute multivariate effect sizes and their sampling covariance matrices. We focus on the standardized mean difference (multiple-treatment and multiple-endpoint studies) with or without the assumption of the homogeneity of variances (or covariance matrices) in this study. Empirical examples were used to illustrate the procedures in R. Two computer simulation studies were used to evaluate the empirical performance of the SEM approach. The findings suggest that in multiple-treatment and multiple-endpoint studies, when the assumption of the homogeneity of variances (or covariance matrices) is questionable, it is preferable not to impose this assumption when estimating the effect sizes. Implications and further directions are discussed. © 2018 Cheung.
Source Title: Frontiers in Psychology
URI: http://scholarbank.nus.edu.sg/handle/10635/152143
ISSN: 16641078
DOI: 10.3389/fpsyg.2018.01387
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