The ERP waveforms of comparisons among conditions in each group and between groups in each condition have been illustrated in Fig. 4. The Gain conditions (+50 and +10) had higher ORP amplitude than Loss conditions in both groups. Alcoholics showed decreased ORP amplitude compared to Controls in both Loss and Gain conditions. Although there were no significant condition differences, the ORN component showed a prominent group differences wherein the alcoholic group had a smaller ORN component than the control group.
