Similar to relationships observed in prior studies (Schuckit et al., 1997b, 2009b), SRE5 and SRET values at T25 and T30 correlated with alcohol challenge LRs at −.20, underscoring the fact that the SRE and alcohol challenge measures appear to be two overlapping, but not identical, aspects of LR. The lack of perfect concordance may reflect the fact that the alcohol challenges directly measure how intensely a person responds to alcohol in a laboratory setting at closely monitored BACs, while the SRE asks them to recall their overall general response across what were likely to be many actual drinking experiences at different epochs of their lives. Both LR measures relate to recent drinking, both predict later heavier alcohol consumption and related problems, both LR values appear to be genetically influenced (Dick et al., 2006; Ehlers et al., 2010; Hinkers et al., 2006; Hu et al, 2005; Joslyn et al., 2010; Kramer et al., 2008), but alcohol challenge and SRE-based LRs do not reflect identical phenomena.
