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Updated: Feb 21, 2026

Detecting Pre-Stimulus Source-Level Effects on Object Perception with Magnetoencephalography
Published on: July 26, 2019
Electrophysiological evidence for differences between fusion and combination illusions in audiovisual speech
Martijn Baart1,2, Alma Lindborg3, Tobias S Andersen3
1Department of Cognitive Neuropsychology, Tilburg University, Warandelaan 2, Tilburg, 5000 LE, The Netherlands.
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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