Children With a History of SLI Show Reduced Sensitivity to Audiovisual Temporal Asynchrony: An ERP Study
| Autor: | Natalya Kaganovich, Dana Gustafson, Laurence B. Leonard, Jennifer Schumaker, Danielle Macias |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Adult
Male Auditory perception Linguistics and Language Visual perception Simultaneity Sensory system Electroencephalography Specific language impairment Article Language and Linguistics Young Adult Speech and Hearing Event-related potential medicine Humans Attention Language Development Disorders Child Evoked Potentials medicine.diagnostic_test Time perception medicine.disease Acoustic Stimulation Child Preschool Time Perception Auditory Perception Visual Perception Female Psychology Photic Stimulation Cognitive psychology |
| Zdroj: | Journal of Speech, Language, and Hearing Research. 57:1480-1502 |
| ISSN: | 1558-9102 1092-4388 |
| DOI: | 10.1044/2014_jslhr-l-13-0192 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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