Objective: The present study was to investigate the relationship between social network sites use and depres-sion in adolescents, as well as the mediating role of online social capital in this relationship. Methods: A sample of 566 ad-olescents were administered with Social Network Site Intensity Scale, Perceived online Social Capital Scale(PSCS) andCES-D Self-Report Depression Scale. Results: 1Social Network Site Intensity was positively correlated with online socialcapital, while Social Network Site Intensity and online social capital we...