peers and more positive alcohol expectancies) might help explain the greater relationship of a low LR to heavier drinking in males in the younger generations as the impact of heavier drinking peers and more positive alcohol expectancies have been shown to mediate how a low LR relates to higher drinking maximums and alcohol problems (Salvatore et al.,2017; Schuckit et al., 2017). Another possible explanation might rest with the fact that more than half of a person’s LR values relate to the environment and that in these families 19% of the fathers but only 5% of the mothers were alcohol dependent, with the possibilities that the model of heavy drinking in the same sex parent might have had a greater impact on sons than daughters.
