Every effect size has its place: a commentary on the avoidance of pre–post effect sizes

摘要

Along with the increasing popularity of meta-analysis, their methods have very much improved in the last decades, leading to highly sophisticated methods, for example multiple treatment comparisons and advanced multiple regression models (Sutton & Higgins, ). However, these improvements of meta-analytic methods should not obstruct one's view of the basic decisions and assumptions, because these may have a significant impact on result and interpretation of a meta-analysis, as was nicely illustrated by Cuijpers . ( ) in this journal for the choice of the effect size.