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The neural correlate of mid-value offers in ultimatum game

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Listed:
  • Xiyun Zhong
  • Ruojun Wang
  • Shiyun Huang
  • Jingwei Chen
  • Hongmin Chen
  • Chen Qu

Abstract

In the ultimatum game (UG), mid-value offers are unfair but not so unreasonable as to be rejected immediately. As a consequence, they are difficult for responders to evaluate because of the conflict that arises between two key processes, namely inequity aversion and self-interests. Since there is no clear consensus in the literature on event-related potential (ERP) as to how mid-value offers are processed, we designed an experiment to explore how the ability to reject offers influences key ERP signatures. By manipulating the right to reject offers based on game type (ultimatum game, UG or dictator game, DG), our study explored how ERPs were influenced by three types of offers available to participants (fair, unfair and mid-value). We recorded the electroencephalogram results of 28 participants while they responded to the three kinds of offers in the UG and the DG. We observed that mid-value offers in the UG elicited more negative feedback-related negativity and N400 than did the unfair offers. However, these ERP patterns were specific to the UG. Furthermore, we interpreted these results as further electrophysiological evidence of the interaction between the two processing systems during the UG.

Suggested Citation

  • Xiyun Zhong & Ruojun Wang & Shiyun Huang & Jingwei Chen & Hongmin Chen & Chen Qu, 2019. "The neural correlate of mid-value offers in ultimatum game," PLOS ONE, Public Library of Science, vol. 14(8), pages 1-16, August.
    • Handle: RePEc:plo:pone00:0220622
    DOI: 10.1371/journal.pone.0220622
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