This study evaluates a new technology-supported blended intervention, mobile Social Interaction Therapy by Exposure (mSITE), that targets social behavior, and it also validates several new techniques for measuring social behavior. mSITE blends brief in-person psychotherapy with a context-triggered mobile smartphone intervention and remote telephone coaching. The investigators will conduct a randomized clinical trial of mSITE, evaluating whether the intervention leads to clinically significant changes in the frequency of social interactions in comparison to a therapist and device matched condition. The investigators will changes in outcome measures at baseline and Weeks 8, 18, and 30. If found to be effective, a scalable intervention that reduces social isolation in serious mental illness would have significant personal, societal, and economic impact.
