et al., 2007) mediates some of the increased risk of alcohol dependence. However, the positive associations that remained even after controlling for volume of consumption suggest possible roles of shared genetic liability or residual associations between externalizing psychopathology and drinking pattern, drinking motivation, drinking expectancies and/or behavioral response to drinking (Hicks et al., 2007b, Kendler et al., 2006; Klopnik et al., 2009).
