Table 2.

The main findings of action video game training on young and older adults.

Cognitive domains	Number of studies	Effect size		Heterogeneity			Egger’s test
		d (SE)	95% CI	Q	P	I2	t	P
Young adults
Overall cognition	12	0.75 (0.16)	0.43–1.07	42.27	<0.001	73.97	10.00	0.287
Processing speed/ attention	4	0.81 (0.47)	0.11–1.73	19.82	<0.001	84.86	0.30	0.790
Visuospatial ability	6	0.70 (0.12)	0.46–0.94	3.94	0.559	<0.001	2.09	0.105
Executive function	4	0.64 (0.33)	0.01–1.29	14.87	<0.01	79.88	2.00	0.637
Older adults
Overall cognition	8	0.38 (0.13)	0.12–0.64	48.14	<0.001	85.46	0.36	0.728
Processing speed/ attention	8	0.37 (0.20)	-0.02 to 0.76	54.59	<0.001	87.18	0.55	0.601
Memory	3	0.33 (0.19)	-0.03 to 0.71	0.00	0.998	0.00	0.29	0.822
Visuospatial ability	4	0.29 (0.20)	-0.10 to 0.68	7.15	0.067	58.05	0.92	0.455
Executive function	5	0.40 (0.22)	-0.04 to 0.84	14.87	<0.001	88.96	0.32	0.773
Overall adults
Overall cognition	20	0.58 (0.10)	0.37–0.78	103.57	<0.001	81.67	1.84	0.082
Processing speed/ attention	12	0.50 (0.18)	0.14–0.85	81.69	<0.001	86.53	0.15	0.883
Memory	3	0.33 (0.19)	-0.05 to 0.71	<0.001	0.998	<0.001	0.29	0.822
Visuospatial ability	10	0.54 (0.12)	0.30–0.77	15.37	0.081	41.43	0.78	0.458
Executive function	9	0.49 (0.17)	0.15–0.83	51.19	<0.001	84.37	0.13	0.898

Note: CI, confidence interval; SE, stander error.