Table 4.

Results of the Pretest MANOVAs, of Pretest-Posttest MANCOVAs, and Effect Size (η²) in all grouped variables, between experimental and control groups.

	Pretest MANOVA & Effect Size					Pretest-Posttest MANCOVA & Effect Size
	Λ	F	p	η2	r	Λ	F	p	η2	r
SCREENING. Bullying & Cyberbullying	0.852	4.87	<0.001	0.148	0.38	0.834	5.58	<0.001	0.087	0.29
CUVE-R. School Violence	0.798	7.12	<0.001	0.202	0.44	0.664	12.09	<0.001	0.336	0.57
CAPI-A. Aggressiveness	0.936	5.90	<0.01	0.064	0.25	0.859	13.99	<0.001	0.141	0.37
AECS. Social Behavior	0.957	0.91	>0.05	0.043	0.20	0.847	3.45	<0.05	0.153	0.39
CONFLICTALK. Conflict Resolution	0.972	1.62	>0.05	0.028	0.16	0.849	9.87	<0.001	0.151	0.38

Λ, Wilks' Lambda; η², Eta squared effect size.