Fig. 1

Intervention effects of the positive psychology course. a Intervention effects on the preliminary participant cohort. After 8 weeks of positive psychology training, the hope, life satisfaction and subjective happiness scales of the participants were significantly improved, while the depression and anxiety symptoms were relieved. b Validation of the intervention effects on an independent cohort of students. The intervention effects of the positive psychology course were validated on an independent cohort of students who enrolled in the course in the year following the above preliminary study. A similar trend was observed. In the figure, the average score of the pre-course group is normalized to 1. *P < 0.05, * *P < 0.01.