To this aim, both oral and manual responses were evaluated during the perception of auditory and audiovisual speech stimuli, clear or embedded in white noise. In this study, we attempted to combine these two paradigms by testing whether the visual modality could speed motor response in a close-shadowing task. Another argument is provided by audiovisual interactions often interpreted as referring to a multisensory-motor framework. The fact that close-shadowing can occur very rapidly and much faster than manual identification of the speech target is taken to suggest that perceptually induced speech representations are already shaped in a motor-compatible format. One classical argument in favor of a functional role of the motor system in speech perception comes from the close-shadowing task in which a subject has to identify and to repeat as quickly as possible an auditory speech stimulus. CNRS, Grenoble Images Parole Signal Automatique-Lab, Speech and Cognition Department, UMR 5216, Grenoble University, Grenoble, France.Lucie Scarbel * Denis Beautemps Jean-Luc Schwartz Marc Sato
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