The Mood and Brain Circuitry in Adolescence Research Study The goal of this study: investigate brain-behavior relationships in adolescents. We research depression in adolescents through 3 approaches: Cognitive, Emotional, and Behavioral Neural This study will examine in teenagers the structure and function of brain circuitry involved in processing positively valenced stimuli and reward. Emotional Teens and their parents will help us understand how adolesence affects mood by completing mood diaries and having conversations about themselves with clinicians. Behavioral We’ll learn about adolescent behavior by having teens complete game-like computer tasks. Teens will help us learn about everyday activity during adolescence by wearing a device similar to a pedometer. By studying teens from these 3 approaches, we hope to understand how brain activity, emotions, and behavior are linked to depression in adolesence.