The Comorbidity Project

Epidemiological research shows that Major Depressive Disorder (MDD) and Social Anxiety Disorder (SAD) frequently co-occur. Compared to non-comorbid individuals, persons with comorbid MDD and SAD report greater impairment in social and occupational functioning and poorer response to treatment. In this study, we are examining how biological, emotional and cognitive processes predict the course of depression and social anxiety symptoms. Through this research, we hope to inform etiological models and treatment decisions for pure and co-occurring MDD and SAD. For more information, please visit