标题：Neural Dynamics Underlying the Evaluation Process of Ambiguous Options During Reward-Related Decision-Making
作者：Zhu, Chengkang; Pan, Jingjing; Wang, Yiwen; Li, Jianbiao; Wang, Pengcheng
作者机构：[Zhu, Chengkang; Pan, Jingjing] Nankai Univ, Reinhard Selten Lab, Business Sch, China Acad Corp Governance, Tianjin, Peoples R China.; [Zhu, Chengka 更多
通讯作者：Li, JB;Li, JB;Wang, PC
通讯作者地址：[Li, JB]Shandong Univ, Sch Econ, Inst Study Brain Like Econ, Jinan, Shandong, Peoples R China;[Li, JB]Nankai Univ, Binhai Coll, Dept Econ & Management 更多
来源：FRONTIERS IN PSYCHOLOGY
关键词：ambiguous options; evaluation; neural dynamics; P3; delta activity
摘要：Ambiguous decision-making involves different processes. However, few studies have focused on the evaluation process. In this study, event-related potentials (ERPs) and event-related spectrum perturbation (ERSP) techniques were used to explore the neural dynamics underlying the evaluation process of ambiguous options through an ambiguous choice task. Some important results emerged. We found a preference for lotteries with low ambiguity regardless of reward amount, suggesting that subjects were averse to ambiguity in our paradigm. Our electroencephalography (EEG) results clarified the neural dynamics underlying the evaluation process. In the time domain, lotteries with both a larger reward and lower ambiguity elicited a larger P3. In the time-frequency domain, larger amplitudes of delta activity at 200-400 ms and 500-600 ms post-stimulus were elicited by lotteries with low ambiguity. Moreover, lotteries with a larger reward elicited larger amplitudes of delta activity at 400-600 ms post-stimulus. Our ERPs and ERSP results suggested that individuals in our paradigm evaluated ambiguity and reward separately, and then integrated their evaluation to form subjective values of different lotteries.