the yes/no indicator that asks whether the participant had used hallucinogens, including MDMA/ecstasy, LSD, acid, mushrooms, phencyclidine (PCP), rohypnol and Special K as part of the Timeline Followback Method assessment, a calendar-based measure for assessing self-reported retrospective daily estimates of alcohol, tobacco and/or illicit substance use.
the yes/no indicator that asks whether the participant had used hallucinogens, including MDMA/ecstasy, LSD, acid, mushrooms, phencyclidine (PCP), rohypnol and Special K as part of the Timeline Followback Method assessment, a calendar-based measure for assessing self-reported retrospective daily estimates of alcohol, tobacco and/or illicit substance use.