ERIC Number: EJ1038516
Record Type: Journal
Publication Date: 2014-Jun
Abstractor: As Provided
Reference Count: 64
Brief Report: Arrested Development of Audiovisual Speech Perception in Autism Spectrum Disorders
Stevenson, Ryan A.; Siemann, Justin K.; Woynaroski, Tiffany G.; Schneider, Brittany C.; Eberly, Haley E.; Camarata, Stephen M.; Wallace, Mark T.
Journal of Autism and Developmental Disorders, v44 n6 p1470-1477 Jun 2014
Atypical communicative abilities are a core marker of Autism Spectrum Disorders (ASD). A number of studies have shown that, in addition to auditory comprehension differences, individuals with autism frequently show atypical responses to audiovisual speech, suggesting a multisensory contribution to these communicative differences from their typically developing peers. To shed light on possible differences in the maturation of audiovisual speech integration, we tested younger (ages 6-12) and older (ages 13-18) children with and without ASD on a task indexing such multisensory integration. To do this, we used the McGurk effect, in which the pairing of incongruent auditory and visual speech tokens typically results in the perception of a fused percept distinct from the auditory and visual signals, indicative of active integration of the two channels conveying speech information. Whereas little difference was seen in audiovisual speech processing (i.e., reports of McGurk fusion) between the younger ASD and TD groups, there was a significant difference at the older ages. While TD controls exhibited an increased rate of fusion (i.e., integration) with age, children with ASD failed to show this increase. These data suggest arrested development of audiovisual speech integration in ASD. The results are discussed in light of the extant literature and necessary next steps in research.
Descriptors: Autism, Pervasive Developmental Disorders, Children, Adolescents, Sensory Integration, Auditory Perception, Visual Perception, Speech, Language Processing, Age Differences, Severity (of Disability)
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Authoring Institution: N/A