Speech and Non-Speech Audio-Visual Illusions: A Developmental Study

Corinne Tremblay · François Champoux · Patrice Voss · Benoit Antoine Bacon · Franco Leporé · Hugo Théoret

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Multisensory perception and integration Neuroscience and Music Perception Tactile and Sensory Interactions

Abstract

It is well known that simultaneous presentation of incongruent audio and visual stimuli can lead to illusory percepts. Recent data suggest that distinct processes underlie non-specific intersensory speech as opposed to non-speech perception. However, the development of both speech and non-speech intersensory perception across childhood and adolescence remains poorly defined. Thirty-eight observers aged 5 to 19 were tested on the McGurk effect (an audio-visual illusion involving speech), the Illusory Flash effect and the Fusion effect (two audio-visual illusions not involving speech) to investigate the development of audio-visual interactions and contrast speech vs. non-speech developmental patterns. Whereas the strength of audio-visual speech illusions varied as a direct function of maturational level, performance on non-speech illusory tasks appeared to be homogeneous across all ages. These data support the existence of independent maturational processes underlying speech and non-speech audio-visual illusory effects.

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References

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2017Forty Years After Hearing Lips and Seeing Voices: the McGurk Effect Revisited 2014Enhanced audiovisual integration with aging in speech perception: a heightened McGurk effect in older adults 2020What you see is what you hear: Twenty years of research using the Sound-Induced Flash Illusion 2012Changes in Sensory Dominance During Childhood: Converging Evidence From the Colavita Effect and the Sound-Induced Flash Illusion 2011Multisensory Integration Develops Late in Humans

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