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Reward Promotes Self-face Processing: An Event-related Potential Study

By Youlong eZhan, Youlong eZhan, Jie eChen, Jie eChen, Xiao eXiao, Jin eLi, Jin eLi, Zilu eYang, Zilu eYang, Wei eFan, Wei eFan and Yiping eZhong and Yiping eZhong


The present study adopted a reward-priming paradigm to investigate whether and how monetary reward cues affected self-face processing. Event-related potentials (ERPs) were recorded during judgments of head orientation of target faces (self, friend, and stranger), with performance associated with a monetary reward. The results showed self-faces elicited larger N2 mean amplitudes than other-faces, and mean N2 amplitudes increased after monetary reward as compared with no reward cue. Moreover, an interac-tion effect between cue type and face type was observed for the P3 component, sug-gesting that both self-faces and friend-faces elicited larger P3 mean amplitudes than stranger-faces after no reward cue, with no significant difference between self-faces and friend-faces under this condition. However, self-faces elicited larger P3 mean ampli-tudes than friend-faces when monetary reward cues were provided. Interestingly, the enhancement of reward on friend-faces processing was observed at LPP (450-600 ms), suggesting that the LPP difference between friend-faces and stranger-faces was en-hanced with monetary reward cues. Thus, we found that the enhancement effect of re-ward on self-relevant processing occurred at the later stages, but not at the early stage. These findings suggest that the activation of the reward expectations can enhance self-face processing, yielding a robust and sustained modulation over their overlapped brain areas where reward and self-relevant processing mechanisms may operate together

Topics: Reward, ERP, LPP, P3, Self-face advantage, Self-relevant processing, Psychology, BF1-990
Publisher: Frontiers Media S.A.
Year: 2016
DOI identifier: 10.3389/fpsyg.2016.00735
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