Participants were recruited from the University of California, San Diego (see Table 1), with individuals identified by responses to a questionnaire distributed to undergraduate psychology classes. Survey completion was optional, and the information obtained was used to characterize alcohol-drinking patterns. A follow-up structured telephone interview excluded individuals reporting personal/familial (up to two generations) alcoholism, neurologic/psychiatric disorders, and recent recreational drug use. Exclusionary criteria also included not consuming alcohol, tobacco smoking, use of psychiatric medication, and serious health problems (e.g., asthma, heart condition, etc.). A third survey after written consent ensured current medical health and capability at the time of testing.
