The Neural Signs of Advantageous- and Disadvantageous-inequality Experience Affecting Cooperative Behavior
SUN Qian1 Ma Su-lan1 Liu Yang2 Liu Yong-fang3
1. School of Education, Suzhou University of Science and Technology, Suzhou 215009; 2. School of Mathematical Sciences, Soochow University, Suzhou, 215006, China; 3. School of Psychology and Cognitive Science, East China Normal University, Shanghai, 200062
Abstract：Previous studies have mainly explored the weakening effect of disadvantageous inequality on cooperation, while the role of advantageous inequality remains unclear. In the present work, a dyadic interaction scenario was created, and 32 participants were randomly presented with advantageous-unequal-, disadvantageous-unequal-, and equal distributions. Their cooperative behavior was measured in a subsequent chicken game, while their brain activity was recorded using electroencephalography (EEG). The results demonstrated that, compared with equal distribution, both advantageous- and disadvantageous-unequal distributions weaken cooperation, and the weakening effect of advantageous-unequal distribution was relatively smaller. The pattern of behavioral differences aligned with the patterns observed in the neural signs (FRN & P300). The present study fills a gap in existing research and sheds light on how to understand the relationship between fairness-related experience and subsequent cooperation.
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