Electrophysiological evidence for differences between fusion and combination illusions in audiovisual speech perception

Martijn Baart, Alma Cornelia Lindborg, Tobias S Andersen

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Abstract

Incongruent audiovisual speech stimuli can lead to perceptual illusions such as fusions or combinations. Here, we investigated the underlying audiovisual integration process by measuring ERPs. We observed that visual speech-induced suppression of P2 amplitude (which is generally taken as a measure of audiovisual integration) for fusions was comparable to suppression obtained with fully congruent stimuli, whereas P2 suppression for combinations was larger. We argue that these effects arise because the phonetic incongruency is solved differently for both types of stimuli. This article is protected by copyright. All rights reserved.
Original languageEnglish
JournalEuropean Journal of Neuroscience
ISSN0953-816X
DOIs
Publication statusPublished - 2017

Keywords

  • Audiovisual speech integration
  • ERPs
  • P2 suppression
  • Phonetic audiovisual (in)congruency

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