Grand average event-related brain potentials and topographical maps for the difference wave.

<p>A: Grand average event-related brain potentials. ERPs evoked by positive and negative traits for the near and distant future condition, and the difference wave (negative near future condition-positive near future condition) at FC3 and Cz. B: topographical maps of the voltage amplitudes for the difference wave at 686–712 and 714–740 ms.