Using TMS to Understand Neural Processes of Social Motivation

Inclusion Criteria: * A diagnosis of Major Depressive Disorder OR a diagnosis of Social Anxiety Disorder (assessed/confirmed at screening visit). * Scoring above clinical threshold on a measure of social avoidant behavior (assessed/confirmed at phone screen). Exclusion Criteria: * Unstable psychotropic medication regimen (i.e., changes in psychotropic medication or dosage in past 3 months). * Current or lifetime diagnosis of Bipolar Disorder. * A diagnosis of substance use disorder within past 12 months. * A diagnosis of psychotic-spectrum disorder such as Schizophrenia. * Pregnancy or probable pregnancy. * Medical illness or medical treatment that would preclude or inhibit study participation. * Neurological disorder associated with brain damage. * History of seizures or head trauma with loss of consciousness \> 5 minutes. * Family history of epilepsy or personal epilepsy/seizures * Ferromagnetic implants or ferrmagnetic objects within body (e.g., pacemaker).