Structured Clinical Interview for DSM-IV (SCID-I/P): The SCID-P is a structured diagnostic interview that assesses each of the criteria for DSM-IV diagnoses. To date the SCID has not been revised to assess DSM-5 criteria. The alcohol and drug use disorder modules will be used to thoroughly assess both current and lifetime diagnostic status for abuse and dependence. It has excellent inter-rater and test-retest reliability.