Objective: The aim of this study was to investigate the effect of short-term Naikan therapy on individual mental health and psychological capital. Methods:60
adults were enrolled and divided into control group and experimental group, with 30 in each group. The two groups were evaluated before and after the intervention using the Symptom Checklist 90(SCL-90) and the Mental Capital Scale (PCQ). Results:
(1) After the Naikan therapy experience, the SCL90 scores in the experimental groupdecreased, and the mental health level increased significantly [(155.570±52.685) vs
(112.900±24.850),t=3.767,p<0.01], and the psychological capital questionnaire PCQ score increased. The level of psychological capital increased significantly [(101.733±12.776) vs(132.800±52.892),1=-4.085,p<0.01].2) Mental health and psychological capital Adults' psychological capital is positively corelated with mental health, and there is a linear relationship between psychological capital and mental health(b=399.292). Conclusion:(1) Naikan therapy has significant improvement effects on mental health and psychological capital of adults.(2) Psychological capital has a positive predictive effect on mental health.