Technical University of Denmark.
University of Padova.
J Cogn Neurosci. 2022 May 2;34(6):917-932. doi: 10.1162/jocn_a_01841.
Sharing an experience, without communicating, affects people's subjective perception of the experience, often by intensifying it. We investigated the neural mechanisms underlying shared attention by implementing an EEG study where participants attended to and rated the intensity of emotional faces, simultaneously or independently. Participants performed the task in three experimental conditions: (a) alone; (b) simultaneously next to each other in pairs, without receiving feedback of the other's responses (shared without feedback); and (c) simultaneously while receiving the feedback (shared with feedback). We focused on two face-sensitive ERP components: The amplitude of the N170 was greater in the "shared with feedback" condition compared to the alone condition, reflecting a top-down effect of shared attention on the structural encoding of faces, whereas the EPN was greater in both shared context conditions compared to the alone condition, reflecting an enhanced attention allocation in the processing of emotional content of faces, modulated by the social context. Taken together, these results suggest that shared attention amplifies the neural processing of faces, regardless of the valence of facial expressions.
分享体验而不交流，会影响人们对体验的主观感知，通常会使其增强。我们通过实施一项 EEG 研究来研究共享注意力的神经机制，参与者在单独或同时与他人配对的情况下，对情绪面孔的强度进行关注和评分，而无需接收对方反应的反馈（无反馈的共享）或同时接收反馈（有反馈的共享）。我们关注两个对人脸敏感的 ERP 成分：与单独条件相比，“有反馈的共享”条件下 N170 的振幅更大，反映了共享注意力对人脸结构编码的自上而下的影响，而 EPN 在两种共享条件下都大于单独条件，反映了在处理面部情绪内容时注意力分配的增强，这种增强受社会背景的调节。总的来说，这些结果表明，无论面部表情的效价如何，共享注意力都会放大对面部的神经处理。
