An Initial Investigation of the Neural Correlates of Word Processing in Preschoolers with Specific Language Impairment

Autor/inn/en	Haebig, Eileen; Leonard, Laurence; Usler, Evan; Deevy, Patricia; Weber, Christine
Titel	An Initial Investigation of the Neural Correlates of Word Processing in Preschoolers with Specific Language Impairment
Quelle	In: Journal of Speech, Language, and Hearing Research, 61 (2018) 3, S.729-739 (11 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1092-4388
DOI	10.1044/2017_JSLHR-L-17-0249
Schlagwörter	Brain Hemisphere Functions; Language Impairments; Preschool Children; Comparative Analysis; Diagnostic Tests; Accuracy; Identification; Pictorial Stimuli; Task Analysis; Language Processing; Auditory Stimuli; Decision Making; Verbal Communication; Vocabulary Development + Suchen Sie Ihr Suchwort? Speech disorder; Speech disorders; Speech disabilities; Speech disability; Speech handicap; Speech handicaps; Speech impairment; Speech impairments; Language handicaps; Sprachbehinderung; Pre-school age; Preschool age; Child; Children; Pre-school education; Preschool education; Vorschulalter; Kind; Kinder; Vorschulkind; Vorschulkinder; Vorschulerziehung; Vorschule; Diagnostic test; Diagnostischer Test; Identifikation; Identifizierung; Fantasieanregung; Aufgabenanalyse; Sprachverarbeitung; Auditive Stimulation; Decision-making; Entscheidungsfindung; Wortschatzarbeit
Abstract	Purpose: Previous behavioral studies have found deficits in lexical--semantic abilities in children with specific language impairment (SLI), including reduced depth and breadth of word knowledge. This study explored the neural correlates of early emerging familiar word processing in preschoolers with SLI and typical development. Method: Fifteen preschoolers with typical development and 15 preschoolers with SLI were presented with pictures followed after a brief delay by an auditory label that did or did not match. Event-related brain potentials were time locked to the onset of the auditory labels. Children provided verbal judgments of whether the label matched the picture. Results: There were no group differences in the accuracy of identifying when pictures and labels matched or mismatched. Event-related brain potential data revealed that mismatch trials elicited a robust N400 in both groups, with no group differences in mean amplitude or peak latency. However, the typically developing group demonstrated a more robust late positive component, elicited by mismatch trials. Conclusions: These initial findings indicate that lexical-semantic access of early acquired words, indexed by the N400, does not differ between preschoolers with SLI and typical development when highly familiar words are presented in isolation. However, the typically developing group demonstrated a more mature profile of postlexical reanalysis and integration, indexed by an emerging late positive component. The findings lay the necessary groundwork for better understanding processing of newly learned words in children with SLI. (As Provided).
Anmerkungen	American Speech-Language-Hearing Association. 2200 Research Blvd #250, Rockville, MD 20850. Tel: 301-296-5700; Fax: 301-296-8580; e-mail: slhr@asha.org; Web site: http://jslhr.pubs.asha.org
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2020/1/01