Wang Guangrong, Li Jianbiao, Wang Pengcheng, Zhu Chengkang, Pan Jingjing, Li Shuaiqi
Neural Decision Science Laboratory, Weifang University, Weifang, China.
Reinhard Selten Laboratory, China Academy of Corporate Governance, Business School, Nankai University, Tianjin, China.
Front Psychol. 2019 Mar 26;10:554. doi: 10.3389/fpsyg.2019.00554. eCollection 2019.
Risky decision-making involves risky reward valuation, choice, and feedback processes. However, the temporal dynamics of risky reward processing are not well understood. Using event-related brain potential, we investigated the neural correlates of probability weight and money magnitude in the evaluation of a risky reward. In this study, each risky choice consisted of two risky options, which were presented serially to separate decision-making and option evaluation processes. The early P200 component reflected the process of probability weight, not money magnitude. The medial frontal negativity (MFN) reflected both probability weight and money magnitude processes. The late positive potential (LPP) only reflected the process of probability weight. These results demonstrate distinct temporal dynamics for probability weight and money magnitude processes when evaluating a risky outcome, providing a better understanding of the possible mechanism underlying risky reward processing.
风险决策涉及风险奖励评估、选择和反馈过程。然而，风险奖励处理的时间动态尚未得到很好的理解。利用事件相关脑电位，我们研究了风险奖励评估中概率权重和货币数量的神经关联。在本研究中，每个风险选择由两个风险选项组成，这些选项依次呈现以分离决策和选项评估过程。早期的P200成分反映了概率权重过程，而非货币数量过程。内侧额叶负波（MFN）反映了概率权重和货币数量过程。晚期正电位（LPP）仅反映了概率权重过程。这些结果表明，在评估风险结果时，概率权重和货币数量过程具有不同的时间动态，为更好地理解风险奖励处理的潜在机制提供了依据。
