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Seeing our own voice: an electrophysiological study of audiovisual speech integration during self perception

Avril Treille 1 Coriandre Vilain 1, 2 Sonia Kandel 3 Marc Sato 4
1 GIPSA-PCMD - GIPSA - Perception, Contrôle, Multimodalité et Dynamiques de la parole
GIPSA-DPC - Département Parole et Cognition, GIPSA-PPC - GIPSA Pôle Parole et Cognition
2 GIPSA-Services - GIPSA-Services
GIPSA-lab - Grenoble Images Parole Signal Automatique
3 GIPSA-VSLD - GIPSA - Voix Systèmes Linguistiques et Dialectologie
GIPSA-DPC - Département Parole et Cognition
Abstract : Recent studies suggest that better recognition of one's actions may result from the integration of sensory inputs with our own sensory-motor knowledge. However, whether hearing our voice and seeing our articulatory gestures facilitate audiovisual speech integration is still debated.The present EEG study examined the impact of self-knowledge during the perception of auditory, visual and audiovisual syllables that were previously recorded by a participant or a speaker he/she had never met. Audiovisual interactions were estimated on eighteen participants by comparing the EEG responses to the multisensory stimuli (AV) to the combination of responses to the stimuli presented in isolation (A+V). An amplitude decrease of early P2 auditory evoked potentials was observed during AV compared to A+V. Moreover, shorter latencies of N1 auditory evoked potentials were also observed for self-related visual stimuli compared to those of an unknown speaker.In line with previous EEG studies on multimodal speech perception, our results point to the existence of early integration mechanisms of auditory and visual speech information. Crucially, they also provide evidence for a processing advantage when the perceptual situation involves our own speech productions. Viewing our own utterances leads to a temporal facilitation of the integration of auditory and visual speech signals.
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https://hal.archives-ouvertes.fr/hal-01297672
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Submitted on : Tuesday, April 5, 2016 - 9:49:59 AM
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Avril Treille, Coriandre Vilain, Sonia Kandel, Marc Sato. Seeing our own voice: an electrophysiological study of audiovisual speech integration during self perception. 16th International Multisensory Research Forum (IMRF 2015), Jun 2015, Pise, Italy. ⟨hal-01297672⟩

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