Abstract
Audiovisual speech perception was studied in adults with Asperger syndrome (AS), by utilizing the McGurk effect, in which
conflicting visual articulation alters the perception of heard speech. The AS group perceived the audiovisual stimuli differently
from age, sex and IQ matched controls. When a voice saying /p/ was presented with a face articulating /k/, the controls
predominantly heard /k/. Instead, the AS group heard /k/ and /t/ with almost equal frequency, but with large differences
between individuals. There were no differences in gaze direction or unisensory perception between the AS and control participants
that could have contributed to the audiovisual differences. We suggest an explanation in terms of weak support from the motor
system for audiovisual speech perception in AS.
conflicting visual articulation alters the perception of heard speech. The AS group perceived the audiovisual stimuli differently
from age, sex and IQ matched controls. When a voice saying /p/ was presented with a face articulating /k/, the controls
predominantly heard /k/. Instead, the AS group heard /k/ and /t/ with almost equal frequency, but with large differences
between individuals. There were no differences in gaze direction or unisensory perception between the AS and control participants
that could have contributed to the audiovisual differences. We suggest an explanation in terms of weak support from the motor
system for audiovisual speech perception in AS.
- Content Type Journal Article
- Category Original Paper
- Pages 1-10
- DOI 10.1007/s10803-011-1400-0
- Authors
- Satu Saalasti, Institute of Behavioural Sciences, University of Helsinki, P.O. Box 9, 00014 Helsinki, Finland
- Jari Kätsyri, Knowledge Media Laboratory, Center for Knowledge and Innovation Research (CKIR), Aalto University School of Economics, Aalto, Finland
- Kaisa Tiippana, Institute of Behavioural Sciences, University of Helsinki, P.O. Box 9, 00014 Helsinki, Finland
- Mari Laine-Hernandez, Department of Media Technology, Aalto University School of Science, Aalto, Finland
- Lennart von Wendt, Department of Pediatric and Adolescent Medicine, Helsinki University Central Hospital, Helsinki, Finland
- Mikko Sams, Mind and Brain Laboratory, Department of Biomedical Engineering and Computational Science (BECS), Aalto University School of Science, Aalto, Finland
- Journal Journal of Autism and Developmental Disorders
- Online ISSN 1573-3432
- Print ISSN 0162-3257