title: Audiovisual speech perception and eye gaze behavior of adults with asperger syndrome.
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.
authors: Institute of Behavioural Sciences, University of Helsinki, P.O. Box 9, 00014, Helsinki, Finland. satu.saalasti@helsinki.fi
authors: Satu
authors: S
authors: Saalasti
authors: Jari
authors: J
authors: Kätsyri
authors: Kaisa
authors: K
authors: Tiippana
authors: Mari
authors: M
authors: Laine-Hernandez
authors: Lennart
authors: L
authors: von Wendt
authors: Mikko
authors: M
authors: Sams
mesh_terms: D000161:Acoustic Stimulation; D000328:Adult; D020817:Asperger Syndrome / Q000503:physiopathology*; D005133:Eye Movements / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010775:Photic Stimulation; D013067:Speech Perception / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology