期刊名称：Journal of Modern Applied Statistical Methods
出版年度：2009
卷号：8
期号：2
页码：27
出版社：Wayne State University
摘要：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.
