Table 5.

Investigation of independence and homogeneity of regression slopes assumption

Variables	Source of change	Total squares	df	Mean Squares	F	P-value
Feeling of loneliness	Pre-test	73.55	1	37.02	41.1	˂ 0.001
	Group interaction Pre-test	× 41.65	2	27.34	0.34	0.659
	Error	884.9	30	29.5
Irrational beliefs	Pre-test	109.35	1	54.76	33.14	˂ 0.001
	Group interaction Pre-test	× 41.13	2	31.35	0.33	0.176
	Error .	62.47	30	29.35

Note. df: Degree of freedom.