Ian Gotlib, professor of psychology at Stanford University, discusses his research on depression and emotion in adolescents in this interview from Yale's Experts in Emotion series, directed by June Gruber. Gotlib explains what drew him to the study of emotion and walks through the central findings of his research program, which examines how mood disorders develop and manifest in young people. He addresses cognitive and physiological markers of risk for depression and how emotional processing differs in adolescents who are vulnerable to the disorder. The interview closes with his thoughts on promising future directions in the field and practical advice for students considering a career studying emotion. Filmed in an interview format with timestamped chapters, it runs about 29 minutes and offers a research scientist's first-hand account of what sustained his interest in adolescent depression and where he thinks the field is heading.