PDF(Pubmed)
Abstract：
Conversation is a primary means of social influence, but its effects on brain activity remain unknown. Previous work on conversation and social influence has emphasized public compliance, largely setting private beliefs aside. Here, we show that consensus-building conversation aligns future brain activity within groups, with alignment persisting through novel experiences participants did not discuss. Participants watched ambiguous movie clips during fMRI scanning, then conversed in groups with the goal of coming to a consensus about each clip\'s narrative. After conversation, participants\' brains were scanned while viewing the clips again, along with novel clips from the same movies. Groups that reached consensus showed greater similarity of brain activity after conversation. Participants perceived as having high social status spoke more and signaled disbelief in others, and their groups had unequal turn-taking and lower neural alignment. By contrast, participants with central positions in their real-world social networks encouraged others to speak, facilitating greater group neural alignment. Socially central participants were also more likely to become neurally aligned to others in their groups.
摘要：
谈话是影响社会的主要手段,但是它对大脑活动的影响仍然未知。以前关于对话和社会影响力的工作强调公众的遵守，很大程度上把私人信仰放在一边。这里,我们表明建立共识的对话可以使未来的大脑活动在群体中保持一致，通过新颖的经验坚持一致，参与者没有讨论。参与者在fMRI扫描期间观看了模糊的电影片段，然后分组交谈，目的是就每个剪辑的叙述达成共识。谈话后,参与者的大脑在再次观看剪辑时被扫描，以及同一部电影的小说片段。达成共识的小组在谈话后显示出更大的大脑活动相似性。被认为具有较高社会地位的参与者说话更多，并表示对他人不信任，他们的小组有不平等的轮流和较低的神经排列。相比之下,在现实世界社交网络中处于中心位置的参与者鼓励其他人发言，促进更大的群体神经对齐。以社会为中心的参与者也更有可能在神经上与小组中的其他人保持一致。
