Table 3.

Means and standard deviations in social skills variables of pre- and post-treatment groups: a posteriori contrasts.

		Experimental		Control		Significance statistic
Dimensions		M	SD	M	SD	F	p	d
1	Pre	16.72	2.20	17.81	3.11	2.16	0.14	–
	Post	22.06	2.72	17.90	2.28	33.90	<0.001	0.1.64
2	Pre	15.62	2.93	15.27	3.44	0.16	0.69	–
	Post	17.31	1.81	12.09	1.19	136.86	<0.001	3.32
3	Pre	18.20	3.20	19.36	4.52	1.15	0.29	–
	Post	22.69	2.16	19.72	4.09	11.15	0.00	0.95
4	Pre	21.89	2.79	21.54	4.72	0.11	0.74	–
	Post	24.82	2.15	21.81	4.99	8.50	0.00	0.82
5	Pre	33.31	4.87	33.36	5.03	0.001	0.97	–
	Post	36.93	4.06	29.09	3.93	47.84	<0.001	1.98
6	Pre	20.27	4.32	21.54	3.71	1.22	0.27	–
	Post	24.48	2.42	17.81	3.48	64.75	<0.001	2.48

1, basic social skills; 2, advanced social skills; 3, skills related to emotions; 4, alternative skills to aggression; 5, skills for dealing with stress; 6, skills for planning.