Tang Honghong, Mai Xiaoqin, Wang Shun, Zhu Chaozhe, Krueger Frank, Liu Chao
State Key Laboratory of Cognitive Neuroscience and Learning & IDG/McGovern Institute for Brain Research, Center for Collaboration and Innovation in Brain and Learning Sciences, Beijing Normal University, Beijing 100875, China.
Department of Psychology, Renmin University of China, Beijing 100872, China.
Soc Cogn Affect Neurosci. 2016 Jan;11(1):23-32. doi: 10.1093/scan/nsv092. Epub 2015 Jul 25.
In daily life, interpersonal interactions are influenced by uncertainty about other people's intentions. Face-to-face (FF) interaction reduces such uncertainty by providing external visible cues such as facial expression or body gestures and facilitates shared intentionality to promote belief of cooperative decisions and actual cooperative behaviors in interaction. However, so far little is known about interpersonal brain synchronization between two people engaged in naturally occurring FF interactions. In this study, we combined an adapted ultimatum game with functional near-infrared spectroscopy (fNIRS) hyperscanning to investigate how FF interaction impacts interpersonal brain synchronization during economic exchange. Pairs of strangers interacted repeatedly either FF or face-blocked (FB), while their activation was simultaneously measured in the right temporo-parietal junction (rTPJ) and the control region, right dorsolateral prefrontal cortex (rDLPFC). Behaviorally, FF interactions increased shared intentionality between strangers, leading more positive belief of cooperative decisions and more actual gains in the game. FNIRS results indicated increased interpersonal brain synchronizations during FF interactions in rTPJ (but not in rDLPFC) with greater shared intentionality between partners. These results highlighted the importance of rTPJ in collaborative social interactions during FF economic exchange and warrant future research that combines FF interactions with fNIRS hyperscanning to study social brain disorders such as autism.
在日常生活中，人际互动会受到对他人意图的不确定性的影响。面对面（FF）互动通过提供诸如面部表情或身体姿势等外部可见线索来减少这种不确定性，并促进共享意向性，以促进对互动中合作决策的信念和实际合作行为。然而，到目前为止，对于参与自然发生的FF互动的两人之间的人际大脑同步知之甚少。在本研究中，我们将一种改良的最后通牒博弈与功能近红外光谱（fNIRS）超扫描相结合，以研究FF互动在经济交换过程中如何影响人际大脑同步。陌生人两两配对，反复进行FF或面部遮挡（FB）互动，同时在右侧颞顶联合区（rTPJ）和对照区域右侧背外侧前额叶皮层（rDLPFC）测量他们的激活情况。行为学上，FF互动增加了陌生人之间的共享意向性，导致对合作决策有更积极的信念，并且在游戏中获得更多实际收益。fNIRS结果表明，在FF互动期间，rTPJ（而非rDLPFC）的人际大脑同步增加，伙伴之间的共享意向性更强。这些结果突出了rTPJ在FF经济交换过程中的协作性社会互动中的重要性，并为未来将FF互动与fNIRS超扫描相结合以研究诸如自闭症等社会大脑障碍的研究提供了依据。
