comparison was performed for the Group × Condition × Region as well. On Wald's test, the significant differences between Go and NoGo N2 amplitudes were observed at all except central regions in control and at all except frontal regions in alcoholic subjects (Table 4). The direction of the differences revealed that at the frontal regions, the NoGo N2 had larger amplitudes than the Go N2, whereas at all other regions, the Go N2 had larger amplitudes than the NoGo in both groups. However, only control subjects accounted for the significantly larger NoGo N2 amplitude than Go N2 at frontal regions (Table 4).
