Estimation of the Standardized Mean Difference for Repeated Measures Designs

Authors

Lindsey J. Wolff Smith, The University of Texas at AustinFollow
S. Natasha Beretvas, The University of Texas at AustinFollow

Abstract

This simulation study modified the repeated measures mean difference effect size, d⁼_RM , for scenarios with unequal pre- and post-test score variances. Relative parameter and SE bias were calculated for dRM ≠ versus dRM = . Results consistently favored d^≠_RM over d⁼_RM with worse positive parameter and negative SE bias identified for d⁼_RM for increasingly heterogeneous variance conditions.

DOI

10.22237/jmasm/1257035160