Figure 4

Panel A depicts the mean amplitudes of P3 (350–450 ms) components for self-face, friend-face and stranger-face as a funciton of presetation types and valuesof reward (Note: *p < 0.05, **p < 0.01, ***p < 0.001). Panel B respectively displays the scatterplots with regression line illustrating the correlation between P3 mean amplitudes (µV) and behavioral RTs (ms) for the reward-related promotions of self-face processing under the supraliminal and subliminal representations. A negative, linear relationship was evident (Supraliminal representations: Y = −0.018 X + 0.925, r = −0.46, p < 0.005; Subliminal representions: Y = −0.011 X + 0.656, r = −0.38, p < 0.005). Specifically, Y refers to the diffence of P3 mean amplitudes between high and low rewards, and X refers to the difference of RTs between high and low rewards).