期刊名称：International Journal of Psychology and Behavioral Sciences
印刷版ISSN：2163-1948
电子版ISSN：2163-1956
出版年度：2013
卷号：3
期号：5
页码：123-130
DOI：10.5923/j.ijpbs.20130305.02
语种：English
出版社：Scientific & Academic Publishing Co.
摘要：Event-related potentials (ERPs) were recorded to explore the electrophysiological correlates of reward processing in the complex social comparison context. Four social comparison stimulus categories (four relative reward levels) were mainly prepared: Self:He:She = 1:2:4 (Disadvantageous Inequity); Self:He:She = 1:1:1 (Equity); Self:He:She = 4:2:1 (Advantageous Inequity); Self:He:She = 2:1:4 (Ambiguous Comparison: worse off than some, better off than many). Results showed that: Disadvantageous, Advantageous Inequity and Ambiguous Comparison conditions all elicited a more negative ERP deflection (N350-550) than did Equity between 350-550 ms, which might reflect reward prediction error. Then, Ambiguous Comparison, Disadvantageous and Advantageous Inequity all elicited a more ERP deflection than did Equity between 550-750 ms, which might be involved in evaluating the rewards after detection of reward prediction error. Furthermore, Ambiguous Comparison elicited a greater negativity (N550-750) than did Disadvantageous and Advantageous Inequity, and the generator of N550-750 was localized in the caudate nucleus and the anterior cingulate cortex (ACC), which might be related to reward processing and cognitive conflict controlling. Last, Disadvantageous Inequity elicited a late more positive ERP component (LPC) than did Advantageous Inequity, Equity and Ambiguous Comparison conditions between 1200-1400 ms. The LPC might reflect strong unpleasant emotional experience (social comparison affects subjective well-being).
