coefficients extracted from 39 empirical studies. Employing partial correlation coefficients (PACs) as the effect size measure, the … effect size ranging from 0.095 to 0.113. The meta-regression results indicate that the estimated effect varies systematically …

In this note, we recollect some formulas and facts about linear mixed models in relation to Cohen’s effect size measure … effect size value necessarily depends on the employed linear mixed model estimation procedures. To demonstrate possible …

framework of a linear regression model. In this note, it is demonstrated how unbiased estimation of the effect size parameter …

a sufficiently large effect size are obtained. We successfully verify the results using our own software code in R and …