TY - JOUR
T1 - Modulations of 'late' event-related brain potentials in humans by dynamic audiovisual speech stimuli
AU - Lebib, Riadh
AU - Papo, David
AU - Douiri, Abdel
AU - De Bode, Stella
AU - Gillon Dowens, Margaret
AU - Baudonnière, Pierre Marie
N1 - Funding Information:
The authors are grateful to F. Bouchet, J.C. Bourzeix, and L. Hugueville for technical assistance. This study was supported by the French Medical Research Foundation (FRM grant: FDT20010629055/2).
PY - 2004/11/30
Y1 - 2004/11/30
N2 - 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.
AB - 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.
KW - Audiovisual speech processing
KW - Event-related brain potentials
KW - Integration processes
KW - N300
KW - N400-like effect
UR - http://www.scopus.com/inward/record.url?scp=8644252746&partnerID=8YFLogxK
U2 - 10.1016/j.neulet.2004.09.039
DO - 10.1016/j.neulet.2004.09.039
M3 - Article
C2 - 15531091
AN - SCOPUS:8644252746
SN - 0304-3940
VL - 372
SP - 74
EP - 79
JO - Neuroscience Letters
JF - Neuroscience Letters
IS - 1-2
ER -