Table 5.

Effect sizes of subgroup according to study characteristics.

	Categories	k	ES (Hedges's g)	+95% CI		p	SE
Population diagnosis	AD	2	0.11	−0.47	0.70	0.706	0.30
	MCI	9	0.46	0.25	0.68	<0.0001	0.11
Type of immersion	Full	3	0.47	0.10	0.83	0.012	0.19
	Semi	7	0.38	0.11	0.64	0.005	0.14
	Low	1	0.54	−0.06	1.15	0.077	0.31
Training time	≥20 h	5	0.43	0.15	0.70	0.002	0.14
	>20 h	6	0.42	0.12	0.72	0.006	0.15
Effectiveness	Active	8	0.40	0.15	0.64	0.001	0.12
	Passive	3	0.55	0.15	0.95	0.008	0.21

k, number studies; CI, confidence interval; ES, effect size; SE, standard error.