2 163 REVIEW OF APPLIED & CASUAL GAMES FOR MENTAL HEALTH Figure A.12 Forest plot of standardised effect sizes of studies examining positive affect Andrade et al. 2019 Poppelaars et al. 2018 Russell & Newton, 2008 Russell & Newton, 2008 Active condition vs Casual game(s) Casual game+ vs Casual game Cohen's d [95% CI] -0.50 [-0.84, -0.17] -0.14 [-0.49, 0.21] -0.06 [-0.43, 0.31] 0.24 [-0.13, 0.61] -1.00 -0.75 -0.50 -0.25 0.00 0.25 0.50 0.75 Favours casual game(s) Favours active condition / casual game+ Positive affect Notes. In the study of Poppelaars, Lichtwarck-Aschoff, et al. (2018) participants played the game in pairs. The ICC, however, was zero for positive affect at post-test. Therefore, no adjusted effect size was calculated. In the study of Russell & Newton (2008), participants played as much as possible in pairs. However, based on the ICC found in Poppelaars, Lichtwarck-Aschoff, et al. (2018), no adjusted effect size was calculated. The study of Andrade et al. (2019) used cluster randomisation, but based on the ICC found in Poppelaars, Lichtwarck-Aschoff, et al. (2018) no adjusted effect size was calculated. CI = confidence interval, ICC = intracluster/intraclass correlation coefficient.
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