Event-related brain potentials differentiate positive and negative mood adjectives during both supraliminal and subliminal visual processing
Event-related brain potentials differentiate positive and negative mood adjectives during both supraliminal and subliminal visual processing
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DOI：
10.1016/s0167-8760(01)00133-7
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发表时间：
2001-08-01
影响因子：
3
通讯作者：
Shevrin, H
中科院分区：
文献类型：
--
作者：
Bernat, E;Bunce, S;Shevrin, H
本实验为阈值上(40ms)和阈值下(无掩蔽，1ms)刺激持续时间的视觉呈现的愉快和不愉快的情感配价词(语气形容词)的区别加工提供了脑事件相关电位(ERP)证据。在这两个持续时间内，不愉快的词语都比愉快的词语引起了更积极的幅度。在6个电极部位(F3、F4、P3、P4、ChuzPz、Oz)测量ERP成分(PI、NL、P2、P3和晚期正电位Lp)。潜伏期刺激的事件相关电位显示，在所有测量的成分中，左侧大脑半球的愉快词语和不愉快词语之间存在差异。左半球的阈值上加工在早期成分(Pl和Ni)上有相似的差异，但在晚期成分(P3和Lp)上有双侧差异。P2时间窗的活动与阈值上和阈值下情感反应的差异有关。文中还讨论了情感和意识研究的意义。(C)2001 Elsevier Science B.V.保留所有权利。
This experiment provides brain event-related potential (ERP) evidence for differential processing of visually presented pleasant and unpleasant affectively valent words (mood adjectives) for both supraliminal (40 ms) and subliminal (unmasked, 1 ms) stimulus durations. Unpleasant words elicited a more positive amplitude than pleasant words in both durations. ERP components (PI, Nl, P2, P3, and a late positive potential; LP) were measured at six electrode sites (F3, F4, P3, P4, CzPz, Oz). ERPs to subliminal stimuli demonstrated differences between pleasant and unpleasant words in the left hemisphere across all measured components. Supraliminal processing showed similar differences in the left hemisphere for early components (Pl and NI), but bilateral differences for late components (P3 and LP). Activity in the P2 time window was associated with the divergence between supraliminal and subliminal affective responses. Implications for the study of affect and consciousness are discussed. (C) 2001 Elsevier Science B.V. All rights reserved.