The age 35 evaluation of probands (i.e., 15 years after recruitment) included the then recently developed SRE regarding drinks required across effects the approximate first five times of drinking, the time of heaviest drinking, and drinks required for effects during the three months prior to interview (Schuckit, 2018; Schuckit et al., 1997). The instrument was developed to facilitate collecting LR data on large numbers of individuals at relatively little cost and without requiring travel to a research center to undergo a time-consuming laboratory-based alcohol challenge. The SRE score for any timeframe is the sum of the number of drinks reported across the range of effects actually experienced in that timeframe (e.g., first five times or the combined first five times, recent three months, and period of heaviest drinking) divided by the number of effects reported. This questionnaire has a literature-based Cronbach’s α >.95, retest reliabilities as high as .8, correlates with the alcohol challenge in predicting future heavy drinking at about .60 (Ray et al., 2011; Schuckit et al., 1997), and, as described in the Introduction, performs similarly to the alcohol challenge-based LR in predicting alcohol outcomes.
