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

M. Baart, Alma Lindborg, Tobias 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 similar 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.
Original languageEnglish
Pages (from-to)2578-2583
JournalEuropean Journal of Neuroscience
Volume46
Issue number10
DOIs
Publication statusPublished - 2017

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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 similar 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.",
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Electrophysiological evidence for differences between fusion and combination illusions in audiovisual speech perception. / Baart, M.; Lindborg, Alma; Andersen, Tobias.

In: European Journal of Neuroscience, Vol. 46, No. 10, 2017, p. 2578-2583.

Research output: Contribution to journalArticleScientificpeer-review

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AB - 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 similar 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.

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