The effect of group counseling based on positive psychology on the WhatsApp social media platform on the severity of premenstrual syndrome symptoms: a randomized clinical trial

Table 3 Effect of positive counseling on the severity of premenstrual syndrome symptoms

Effect	Sum of squares	Degree of freedom	Mean square	F	p-value*	Eta squared
Huynh-Feldt (time)	544.017	2	277.008	12.805	0.001	0.252
Huynh-Feldt (time*group)	271.25	2	135.625	6.27	0.003	0.142
Error correction (time)	1644.067	76	21.632

ISSN: 1472-6874