Fig. 8.

Forest plot for meta-analysis IV illustrating the effect of applying either an external or internal attentional focus during sport performance in athletes. Effect sizes are the standardized mean change (SMC) using change score standardization with a 95% confidence interval (CI). Positive SMC values favor an internal focus and negative SMCs favor an external focus on the performance outcome. Black squares are individual effect sizes and the square size represent the relative weight. The black rhombus is the summary effect size estimate for the random-effect (RE) model