MedicalResearch.com Interview with: Melissa G. Hunt, Ph.D. Diplomate - Academy of Cognitive Therapy Chair - PENDELDOT Associate Director of Clinical Training Department of Psychology University of Pennsylvania MedicalResearch.com: What is the background for this study? Response: Lots of prior research has established a correlation, or association, between social media use and depression.  Ours is the first study to establish an actual causal relationship between using more social media, and feeling more depressed.