To explore the relationship and mediating mechanisms among perceived social support, depression, cognitive reappraisal, and basic psychological needs among college students in ethnic regions, this study conducted a questionnaire survey of 968 college students using the Perceived Social Support Scale, Emotion Regulation Questionnaire (Cognitive Reappraisal subscale), Basic Psychological Needs Scale, and Center for Epidemiological Studies Depression Scale (CES-D). The aim was to analyze the impact and underlying mechanisms of perceived social support on their depression. The results indicate that: (1) there is a significant pairwise relationship between perceived social support, depression, co... More >