The threshold for the McGurk effect in audio-visual noise decreases with development

Hirst, R.J., Stacey, J.E. ORCID: 0000-0003-4035-712X, Cragg, L., Stacey, P.C. ORCID: 0000-0002-6018-8979 and Allen, H.A., 2018. The threshold for the McGurk effect in audio-visual noise decreases with development. Scientific Reports, 8: 12372. ISSN 2045-2322

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Across development, vision increasingly infuences audio-visual perception. This is evidenced in illusions such as the McGurk efect, in which a seen mouth movement changes the perceived sound. The current paper assessed the efects of manipulating the clarity of the heard and seen signal upon the McGurk efect in children aged 3–6 (n=29), 7–9 (n=32) and 10–12 (n=29) years, and adults aged 20–35 years (n=32). Auditory noise increased, and visual blur decreased, the likelihood of vision changing auditory perception. Based upon a proposed developmental shift from auditory to visual dominance we predicted that younger children would be less susceptible to McGurk responses, and that adults would continue to be infuenced by vision in higher levels of visual noise and with less auditory noise. Susceptibility to the McGurk efect was higher in adults compared with 3–6-year-olds and 7–9-yearolds but not 10–12-year-olds. Younger children required more auditory noise, and less visual noise, than adults to induce McGurk responses (i.e. adults and older children were more easily infuenced by vision). Reduced susceptibility in childhood supports the theory that sensory dominance shifts across development and reaches adult-like levels by 10 years of age.

Item Type: Journal article
Publication Title: Scientific Reports
Creators: Hirst, R.J., Stacey, J.E., Cragg, L., Stacey, P.C. and Allen, H.A.
Publisher: Springer Nature
Date: 17 August 2018
Volume: 8
ISSN: 2045-2322
Divisions: Schools > School of Social Sciences
Record created by: Jill Tomkinson
Date Added: 24 Aug 2018 14:17
Last Modified: 24 Aug 2018 14:17

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