highly significantp < .001
Mean ERP amplitudes (200–400 ms, including central electrodes Fz, Cz, Pz) were subjected to a repeated measurement ANOVA revealing a highly significant main effect of Go/Nogo (F1,15) = 33.32, p < .001) but neither a main effect of Product (F(1,15) = 2.96) nor of Congruency (F(1,15) = 0.75).