Modulations of 'late' event-related brain potentials in humans by dynamic audiovisual speech stimuli
Modulations of 'late' event-related brain potentials in humans by dynamic audiovisual speech stimuli
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DOI：
10.1016/j.neulet.2004.09.039
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发表时间：
2004-11-30
影响因子：
2.5
通讯作者：
Baudonnière, PM
中科院分区：
文献类型：
--
作者：
Lebib, R;Papo, D;Baudonnière, PM
Lipreading reliably improve speech perception during face-to-face conversation. Within the range of good dubbing, however, adults tolerate some audiovisual (AV) discrepancies and lipreading, then, can give rise to confusion. We used event-related brain potentials (ERPs) to study the perceptual strategies governing the intermodal processing of dynamic and bimodal speech stimuli, either congruently dubbed or not. Electrophysiological analyses revealed that non-coherent audiovisual dubbings modulated in amplitude an endogenous ERP component, the N300, we compared to a 'N400-like effect' reflecting the difficulty to integrate these conflicting pieces of information. This result adds further support for the existence of a cerebral system underlying 'integrative processes' lato sensu. Further studies should take advantage of this 'N400-like effect' with AV speech stimuli to open new perspectives in the domain of psycholinguistics. (C) 2004 Elsevier Ireland Ltd. All rights reserved.
