and/or <25 total drinks per month, e.g., Jacobus et al., 2009; Lisdahl et al., 2013b; Luciana et al., 2013; McQueeny et al., 2009; Norman et al., 2011; Schweinsburg et al., 2010; Squeglia et al., 2012b; Thayer et al., 2013; Wetherill, Castro, et al., 2013; Wetherill, Squeglia, et al., 2013; Xiao et al., 2013). Thus, more AU youth in this evaluation had patterns and levels of drinking behaviour that are consonant with broader, typically-developing adolescents (e.g., Shedler & Block, 1990), for whom some experimentation with alcohol and other substance use is normative. This is important because it means that while a subset of the AU samples exhibited very high levels of problem drinking (e.g., >40 drinks per month; Caldwell et al., 2005; Cardenas et al., 2013; Fein et al., 2013; Medina et al., 2008; Nagel et al., 2005; Tapert et al., 2004a; Tapert et al., 2003; Tapert et al., 2004b), overall, the observed patterns of brain impact were found for AU youth without heavy, sustained, adult-like patterns of drinking, but instead light, occasional consumption. This suggests that caution should be taken when extrapolating these results to youth with much heavier patterns of AU, such as weekly binge drinkers. However, these data
