Categories | Outcome variables | Heterogeneity test | Combined effects test | ||||
---|---|---|---|---|---|---|---|
I2 | P | SMD | 95%CI | Z | P | ||
Open skills | Inhibitory control | 91.8% | < 0.001 | -0.942 | (-1.290, -0.594) | 5.30 | < 0.001 |
 | Working memory | 93.0% | < 0.001 | -0.833 | (-1.220, -0.447) | 4.22 | < 0.001 |
 | Cognitive flexibility | 94.1% | < 0.001 | -1.116 | (-1.658, -0.575) | 4.04 | < 0.001 |
Closed skills | Inhibitory control | 94.9% | < 0.001 | -0.524 | (-0.957, -0.091) | 2.37 | 0.018 |
 | Working memory | 96.5% | < 0.001 | -0.539 | (-1.158, 0.080) | 1.71 | 0.088 |
 | Cognitive flexibility | 94.8% | < 0.001 | -0.854 | (-1.353, -0.356) | 3.36 | 0.001 |
Continuous skills | Inhibitory control | 97.2% | < 0.001 | -0.450 | (-1.203, 0.303) | 1.17 | 0.242 |
 | Working memory | 97.6% | < 0.001 | -0.048 | (-1.002, 0.905) | 0.10 | 0.921 |
 | Cognitive flexibility | 96.3% | < 0.001 | -1.124 | (-1.863, -0.384) | 2.98 | 0.003 |
Sequential skills | Inhibitory control | 88.3% | < 0.001 | -0.834 | (-1.090, -0.578) | 6.39 | < 0.001 |
 | Working memory | 92.0% | < 0.001 | -0.889 | (-1.224, -0.554) | 5.20 | < 0.001 |
 | Cognitive flexibility | 94.1% | < 0.001 | -0.903 | (-1.375, -0.403) | 3.76 | < 0.001 |