Dissociations of subliminal and supraliminal self-face from other-face processing: Behavioral and ERP evidence
Dissociations of subliminal and supraliminal self-face from other-face processing: Behavioral and ERP evidence
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阈下和阈上自我面孔与他人面孔处理的分离：行为和 ERP 证据
DOI：
10.1016/j.neuropsychologia.2012.07.040
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发表时间：
2012-10-01
期刊：
影响因子：
2.6
通讯作者：
Xu, Shan
中科院分区：
文献类型：
--
作者：
Geng, Haiyan;Zhang, Shen;Xu, Shan
在超阈值自我刺激和传统范式（如掩蔽启动）的研究中，自我相关信息的处理速度更快、更准确。我们进行了两项实验，以研究阈下自我面孔处理是否具有这一优势，以及在阈下和超阈值水平上处理自我面孔的神经相关性。我们发现，在长时间的眼间抑制过程中，自我面孔比其他著名面孔更快地获得对动态噪声模式的主导地位以进入意识（实验 1）。同时，自我和著名他人面孔加工的阈下对比反映在早期顶点正电位（VPP）分量的减少，而阈上自我他人面孔分化反映在N170的增强以及对自我面孔的更积极的晚期分量（300-580ms，实验2）。我们的两个实验发现，自我和他人面孔处理的明显分离验证了自我优势。我们的研究结果还有助于理解不同意识水平下自我面部处理的机制。 (C) 2012 Elsevier Ltd. 保留所有权利。
Self-related information has been found to be processed more quickly and accurately in studies with supraliminal self-stimuli and traditional paradigms such as masked priming. We conducted two experiments to investigate whether subliminal self-face processing enjoys this advantage and the neural correlates of processing self-faces at both subliminal and supraliminal levels. We found that self-faces were quicker than famous-other faces to gain dominance against dynamic noise patterns during prolonged interocular suppression to enter awareness (Experiment 1). Meanwhile, subliminal contrast of self- and famous-other face processing was reflected in a reduced early vertex positive potential (VPP) component, whereas supraliminal self-other face differentiation was reflected in an enhanced N170, as well as a more positive late component (300-580 ms, Experiment 2) to the self-face. The clear dissociations of self- and other-face processing found across our two experiments validate the self advantage. Our findings also contribute to understandings of the mechanisms underlying self-face processing at different levels of awareness. (C) 2012 Elsevier Ltd. All rights reserved.