Genetic Psychiatry Cohort Study (GPC)

Do you suffer from obsessions?

Unwelcome and distressing ideas, thoughts or images that repeatedly enter your mind.

Do you suffer from compulsions?

Behaviors or acts that you feel driven to perform although you may recognize them as senseless or excessive.


We invite you to join an international research study sponsored by the National Institute of Mental Health. The goal of the study is to identify genes that may be related to OCD. Scientists, physicians and clinicians at the University of Southern California are leading this work. Participation involves a questionnaire, and an interview with one of our clinicians. Arrangements can be made if you live out of state.

If you would like to participate, please click on the link below. You will be asked to read and agree to our Informed Consent and to complete our on-line questionnaire. This questionnaire should take between 15-40 minutes to complete and will ask general questions about you and specific questions about your health and medical history. Take as much time as you need.


  • All information will be kept strictly confidential.
  • No information will be given out that might identify you.
  • You may be compensated for your time.
  • If you are unable to complete any portion of the questionnaire please contact us at 323-863-3995 and a clinician will help you.



Genetic Psychiatry Cohort: Partners in Discovery

Comorbidity of Severe Psychotic Disorders with Measures of Substance Abuse