Department of Psychological Science, Kwansei Gakuin University, Nishinomiya, 662-8501, Japan.
Center for Applied Psychological Science (CAPS), Kwansei Gakuin University, Nishinomiya, 662-8501, Japan.
Sci Rep. 2022 Jan 7;12(1):65. doi: 10.1038/s41598-021-03971-9.
In action monitoring, i.e., evaluating an outcome of our behavior, a reward prediction error signal is calculated as the difference between actual and predicted outcomes and is used to adjust future behavior. Previous studies demonstrate that this signal, which is reflected by an event-related brain potential called feedback-related negativity (FRN), occurs in response to not only one's own outcomes, but also those of others. However, it is still unknown if predictions of different actors' performance interact with each other. Thus, we investigated how predictions from one's own and another's performance history affect each other by manipulating the task difficulty for participants themselves and their partners independently. Pairs of participants performed a time estimation task, randomly switching the roles of actor and observer from trial to trial. Results show that the history of the other's performance did not modulate the amplitude of the FRN for the evaluation of one's own outcomes. In contrast, the amplitude of the observer FRN for the other's outcomes differed according to the frequency of one's own action outcomes. In conclusion, the monitoring system tracks the histories of one's own and observed outcomes separately and considers information related to one's own action outcomes to be more important.
在行为监测中，即评估我们行为的结果，奖励预测误差信号是通过实际结果和预测结果之间的差异来计算的，并用于调整未来的行为。先前的研究表明，这种信号反映在称为反馈相关负波（FRN）的事件相关脑电位中，不仅对自己的结果，而且对他人的结果都有反应。然而，目前尚不清楚不同演员的表现预测是否相互作用。因此，我们通过独立操纵参与者自身和其伙伴的任务难度，研究了自身和他人表现历史的预测如何相互影响。参与者成对执行时间估计任务，从试验到试验随机切换演员和观察者的角色。结果表明，他人表现的历史不会调制自身结果评价的 FRN 幅度。相比之下，另一个人结果的观察者 FRN 的幅度根据自身动作结果的频率而有所不同。总之，监测系统分别跟踪自身和观察到的结果的历史，并认为与自身动作结果相关的信息更为重要。
