With the outburst of social medias in current life, problematic use is prevalent in adolescents and has become a contemporary concern. Although family environment has been identified as a risk factor, little is known how family environment is associated with problematic social media use (PSMU). Drawing on Snyder's hope theory and Davis's cognitive-behavioral model, this study examines how family function is linked with PSMU via hope. The study also investigates the moderating effect of perceived social support (PSS) by analyzing how PSS, interacts with family function, affects hope and further...