 Phase I of the study will involve 25 healthy controls no anxiety or mood disorders and 25 outpatients with primary DSM 5 OCD. Participants ages 18-65 will be assessed using the Mini International Neuropsychiatric Interview MINI to determine whether criteria for a primary OCD diagnosis is met alongside any additional comorbid disorders. Healthy controls will also be assessed using the MINI to confirm the absence of any psychiatric disorders. Participants will complete a number of clinician and self-rated symptom severity scales as listed below: 