Fig. 2: Forrest plot of the effect sizes for changes in gaming time before and after the COVID-19 pandemic.
From: Video game play and well-being during the COVID-19 pandemic: a meta-analysis of global findings

The square boxes represent Cohen’s d and sample sizes (the larger the box, the larger the sample size, the larger the contribution to the total effect size). The lines represent 95% confidence intervals. The diamond represents the pooled effect size and the 95% confidence intervals.