Table 4. Effect size analyses by controlling variables.

		Effect size					Test for subgroup difference
		K	g	SE	95%CI-L	95%CI-U	Q	df	p
Participant
School Level	Kindergarten	5	0.28	0.10	0.10	0.47	1.50	3	.682
	Elementary	124	0.38	0.04	0.30	0.45
	Middle	18	0.36	0.12	0.11	0.60
	High	6	0.17	0.23	-0.28	0.62
Group Composition	Without disabilities	117	0.32	0.04	0.24	0.40	6.87	2	.032
	With disabilities	19	0.47	0.13	0.22	0.72
	Inclusion	17	0.58	0.09	0.41	0.76
Program
Program Type	Curricular	48	0.24	0.03	0.18	0.29	2.98	1	.084
	Extra-curricular	105	0.42	0.06	0.31	0.53
	Effect proven	86	0.38	0.05	0.28	0.49	0.65	1	.421
	Developed by researchers	67	0.30	0.02	0.26	0.34
Number of Sessions	Under 10	16	0.15	0.07	0.01	0.28	7.96	2	.020
	11–20	97	0.36	0.04	0.28	0.45
	Over 21	28	0.41	0.05	0.32	0.50
Session length	Under 40min	75	0.40	0.05	0.30	0.50	13.59	2	.001
	41-50min	31	0.30	0.06	0.19	0.42
	Over 51min	30	0.19	0.02	0.16	0.22
Learning Outcomes
	Social-emotional skills in general	14	0.32	0.05	0.23	0.42	10.10	6	.121
	Self-awareness	36	0.25	0.11	0.03	0.47
	Self-control	36	0.29	0.05	0.20	0.38
	Social awareness	21	0.58	0.22	0.15	1.01
	Relationship skills	30	0.20	0.04	0.12	0.29
	Responsible decision making	5	0.31	0.08	0.14	0.47
	Academic skills	11	0.32	0.05	0.23	0.41

Note. K: the number of effect sizes, g: Hedges’ g, SE: Standard Error, CI-L: Confidence intervals lower limit, CI-U: Confidence intervals upper limit.