TABLE 3.

Independent sample t-test for each variable for pre-experimental middle school students.

Variables	Group	M	SD	F	p	Cohen’s d
Interpersonal relationships	Experimental group	121.67	11.08	11.17	0.35	0.20
	Control group	118.71	17.62
Self-identity	Experimental group	55.52	7.26	0.31	0.19	0.29
	Control group	53.27	8.42
Social adjustment	Experimental group	166.14	10.23	0.27	0.42	0.02
	Control group	164.27	11.27