Modulations of 'late' event-related brain potentials in humans by dynamic audiovisual speech stimuli

Riadh Lebib, David Papo, Abdel Douiri, Stella De Bode, Margaret Gillon Dowens, Pierre Marie Baudonnière

Research output: Journal PublicationArticlepeer-review

12 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)74-79
Number of pages6
JournalNeuroscience Letters
Issue number1-2
Publication statusPublished - 30 Nov 2004
Externally publishedYes


  • Audiovisual speech processing
  • Event-related brain potentials
  • Integration processes
  • N300
  • N400-like effect

ASJC Scopus subject areas

  • Neuroscience (all)


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