LR was evaluated using the SRE (Cronbach α >0.90, and one-year retest reliabilities of .82) [11, 37]. Here subjects recorded the number of standard drinks (10 gm of ethanol) required early in their drinking careers for first feeling any effects of this drug, slurring speech, developing an unsteady gait, or unintentionally falling asleep, reporting only those effects actually experienced [4, 17-19]. The SRE score used here is the sum of number of drinks for the effects experienced the ~first five times of drinking (First 5), divided by the number of effects endorsed. Using the SRE, a greater number of drinks required for effects indicates a lower LR per drink consumed, a condition similar to the low LR scores generated from alcohol challenges [9, 11, 38-41].
