Histogram representing the proportion and individual magnitude of alcohol-heightened aggression after gavage (A) or operant self-administration (B) of 1.0 g/kg alcohol. Dark vertical bars represent outbred CFW mice whose average frequency of attack bites after 1 g/kg alcohol exceeds their baseline levels of aggression by >2 SD (alcohol-heightened aggression, or AHA). Gray vertical bars represent mice whose aggressive behavior is not significantly altered by 1 g/kg alcohol (alcohol non-heightened aggression, or ANA), and white vertical bars represent mice whose aggressive behavior after 1 g/kg alcohol is reduced by >2 SD (alcohol-suppressed aggression, or ASA). Dotted horizontal lines represent a 95% confidence interval, ±2 SD from average baseline. From Miczek, et al.86