Meta-analytic strategy. Hunter and Schmidt’s (1994) metaanalytic approach to correct effect size for sampling error variability was used. In addition, the 95% confidence intervals were considered. Following Hunter and Schmidt’s recommendations, the homogeneity of the overall effect was evaluated based on the 75% criterion. According to this criterion, if less than 75% of the variance is attributed to sampling variance, then the hypothesized moderators should be tested by conducting new meta-analyses for each moderator level. Moderators were considered influential if the analyses revealed nonoverlapping 95% confidence intervals for the different group levels.