Evaluation and analysis of anxiety and depression symptoms for college students during COVID-19 pandemic

BMC Psychology

Table 2 Reliability and validity of GAD-7, PHQ-9 scales

Scale	Items	Cronbach’s α	Split-half	Ensemble validity			Discriminant validity
Scale	Items	Cronbach’s α	Split-half	r_s^a	Successes/trials	Success rate, %	r_s	Successes/trials	Success rate, %
Validity analysis
GAD-7	7	0.923	0.899	0.71–0.85	7/7	100.00	0.77–0.88	7/7	100.00
PHQ-9	9	0.900	0.895	0.58–0.82	9/9	100.00	0.63–0.82	9/9	100.00

ISSN: 2050-7283