“…Whether measured as the response at a specifi c blood alcohol concentration or through the number of drinks needed for effects (Schuckit et al, , 2012b, the low LR is observed before heavy drinking develops and predicts higher consumption per occasion (Chung and Martin, 2009;Quinn and Fromme, 2011;Schuckit et al, 2007aSchuckit et al, , 2008bSchuckit et al, , 2009Schuckit et al, , 2011bVolavka et al, 1996). The impact of a low LR on later heavier drinking is partially mediated by environmental and attitudinal characteristics, including higher peer drinking (Bates and Labouvie, 1997;Schuckit et al, 2011aSchuckit et al, , 2012b, stress and using alcohol to cope (Ellickson et al, 2001;King and Chassin, 2008;Moberg and Curtin, 2009), and positive expectations of alcohol's effects (Agrawal et al, 2008;Pabst et al, 2010).…”