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Linguistic and Non-Linguistic Semantic Processing in Individuals with Autism Spectrum Disorders: An ERP Study

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Vydáno v:Journal of Autism and Developmental Disorders vol. 47, no. 3 (Mar 2017), p. 795-812
Hlavní autor: Coderre, Emily L.
Další autoři: Chernenok, Mariya, Gordon, Barry, Ledoux, Kerry
Vydáno:
Springer
Témata:
Autism
Pervasive Developmental Disorders
Language Impairments
Semantics
Cognitive Processes
Prompting
Brain
Visual Stimuli
On-line přístup:Citation/Abstract
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Abstrakt:Individuals with autism spectrum disorders (ASD) experience difficulties with language, particularly higher-level functions like semantic integration. Yet some studies indicate that semantic processing of non-linguistic stimuli is not impaired, suggesting a language-specific deficit in semantic processing. Using a semantic priming task, we compared event-related potentials (ERPs) in response to lexico-semantic processing (written words) and visuo-semantic processing (pictures) in adults with ASD and adults with typical development (TD). The ASD group showed successful lexico-semantic and visuo-semantic processing, indicated by similar N400 effects between groups for word and picture stimuli. However, differences in N400 latency and topography in word conditions suggested different lexico-semantic processing mechanisms: an expectancy-based strategy for the TD group but a controlled post-lexical integration strategy for the ASD group.
ISSN:0162-3257
DOI:10.1007/s10803-016-2985-0
Zdroj:ERIC