Abstract：
People perform better collectively than individually, a phenomenon known as the collective benefit. To pursue the benefit, they may learn from previous behaviors, come to know whose initial opinion should be valued, and develop the inclination to take it as the collective one. Such learning may affect interpersonal brain communication. To test these hypotheses, this study recruited participant dyads to conduct a perceptual task on which they made individual decisions first and then the collective one. The enhanced interpersonal brain synchronization (IBS) between participants was explored when individual decisions were in disagreement vs. agreement. Computational modeling revealed that participant dyads developed the dyad inclination of taking the higher-able participants\', not the lower-able ones\' decisions as their collective ones. Brain analyses unveiled the enhanced IBS at frontopolar areas, premotor areas, supramarginal gyri, and right temporal-parietal junctions. The premotor IBS correlated negatively with dyad inclination and collective benefit in the absence of correction. The Granger causality analyses further supported the negative relation of dyad inclination with inter-brain communication. This study highlights that dyads learn to weigh individuals\' decisions, resulting in dyad inclinations, and explores associated inter-brain communication, offering insights into the dynamics of collective decision-making.
摘要：
人们的集体表现比个人更好，一种被称为集体利益的现象。为了追求利益，他们可以从以前的行为中学习，知道应该重视谁的初始意见，并发展将其视为集体的倾向。这种学习可能会影响人与人之间的大脑交流。为了测试这些假设，这项研究招募了参与者dyads进行感知任务，他们首先做出个人决定，然后做出集体决定。当个体决策存在分歧与分歧时，探索了参与者之间增强的人际大脑同步（IBS）协议。计算模型显示，参与者的二元发展了采用更高能力参与者的二元倾向，不是能力较低的人，作为他们的集体决定。大脑分析揭示了额极区域增强的IBS，运动前区域,门上回,和右颞叶顶叶连接。在没有校正的情况下，运动前IBS与二元倾斜和集体利益呈负相关。格兰杰因果关系分析进一步支持二元倾向与大脑间交流的负相关。这项研究强调了二元组合学会权衡个人的决定，导致二元倾斜，并探索相关的大脑间交流，提供对集体决策动态的见解。
