education level of the participant’s two parents was used as a proxy for socioeconomic status. Past or current use of substances other than alcohol, marijuana, and tobacco was exclusionary for FHP and FHN groups. Problem level use (scores > 7) on the Alcohol Use Disorders Identification Test (AUDIT) or the Alcohol, Smoking and Substance Involvement Screening Test (ASSIST) of alcohol, marijuana, and tobacco was also exclusionary.
