The Self-Report of Effects of alcohol questionnaire (Schuckit et al., 1997b) is a self-report instrument used to measure the number of standard drinks required to produce up to four effects of alcohol at three different time periods: a) the first five times the subject used alcohol; b) the period of heaviest drinking; and c) the most recent three months of consumption. For each time period, the subject is asked: a) “how many (standard) drinks did it take for you to begin to feel an effect?”; b) “how many drinks did it take for you to feel a bit dizzy or begin to slur your speech?”; c) “how many drinks did it take you to begin to stumble or walk in an uncoordinated manner?”; d) “how many drinks did it take you to pass out or fall asleep when you did not want to?” Extreme observations were winsorized at the mean plus 2 standard deviations and only individuals who drank at least 2 drinks on one occasion were included in the analysis. Based on their distributions, the square root of SRE-T
