However, the findings on N2 related abnormalities have been equivocal. Realmuto et al. (1993) have reported reduced N2 amplitudes in alcoholics on an auditory oddball task. Similarly, Cristini et al. (2003) have reported reduced auditory oddball N200 in alcoholics and Go/NoGo differences between alcoholics and controls. Reduced N2 amplitude has been associated with ADHD in children on a stop-signal task (Pliszka et al., 2000) and N2 amplitude was found to be significantly lower in impulsive-violent offenders than in matched controls on a cued Go/NoGo task (Chen et al., 2008; Chen et al., 2005), suggesting difficulties with inhibition of prepotent behavior. Porjesz et al. (1987) have reported longer N2 latency in alcoholics in a visual discrimination oddball task. Conversely, Ridderinkhof et al. (2002) reported that the effect of alcohol leads to a substantial reduction in error-related negativity (ERN) amplitude while performing a version of the flanker task, but does not affect N2 amplitude. Recently, Crego et al. (2009) reported larger N2 amplitudes for young binge drinkers in a visual working memory task and interpreted it as a result of higher attentional
