The typical ERP waveform in a gambling paradigm is shown in Fig. 3. The task used in this study also produced similar waveforms as shown in Fig. 4. It can be observed that males have produced the highest ORP amplitudes for the amount 50¢ (+50 and −50) in the central region (at CZ electrode) while females have the highest ORP amplitudes for the outcome of gain (+50 and +10) in the same region. The ORN amplitude showed a maximum difference between +50 and −10 waveforms in both genders. However, the gender differences in the waveforms have been more obvious in ORP amplitude. The females had higher ORP amplitude for the gain conditions (+50 and +10) at central and parietal sites as well as for the loss conditions (−50 and −10) at parietal site.
