Children with a History of SLI Show Reduced Sensitivity to Audiovisual Temporal Asynchrony: An ERP Study

Autor/inn/en	Kaganovich, Natalya; Schumaker, Jennifer; Leonard, Laurence B.; Gustafson, Dana; Macias, Danielle
Titel	Children with a History of SLI Show Reduced Sensitivity to Audiovisual Temporal Asynchrony: An ERP Study
Quelle	In: Journal of Speech, Language, and Hearing Research, 57 (2014) 4, S.1480-1502 (23 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1092-4388
Schlagwörter	Children; Language Impairments; Cognitive Measurement; Brain; Adults; Auditory Perception; Visual Perception; Comparative Analysis; Age Differences; Asynchronous Communication + Suchen Sie Ihr Suchwort? Child; Kind; Kinder; Speech disorder; Speech disorders; Speech disabilities; Speech disability; Speech handicap; Speech handicaps; Speech impairment; Speech impairments; Language handicaps; Sprachbehinderung; Gehirn; Auditive Wahrnehmung; Akustische Wahrnehmung; Akustik; Visuelle Wahrnehmung; Age; Difference; Age difference; Altersunterschied
Abstract	Purpose: The authors examined whether school-age children with a history of specific language impairment (H-SLI), their peers with typical development (TD), and adults differ in sensitivity to audiovisual temporal asynchrony and whether such difference stems from the sensory encoding of audiovisual information. Method: Fifteen H-SLI children, 15 TD children, and 15 adults judged whether a flashed explosion-shaped figure and a 2-kHz pure tone occurred simultaneously. The stimuli were presented at 0-, 100-, 200-, 300-, 400-, and 500-ms temporal offsets. This task was combined with EEG recordings. Results: H-SLI children were profoundly less sensitive to temporal separations between auditory and visual modalities compared with their TD peers. Those H-SLI children who performed better at simultaneity judgment also had higher language aptitude. TD children were less accurate than adults, revealing a remarkably prolonged developmental course of the audiovisual temporal discrimination. Analysis of early event-related potential components suggested that poor sensory encoding was not a key factor in H-SLI children's reduced sensitivity to audiovisual asynchrony. Conclusions: Audiovisual temporal discrimination is impaired in H-SLI children and is still immature during mid-childhood in TD children. The present findings highlight the need for further evaluation of the role of atypical audiovisual processing in the development of SLI. (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10