Deficits in Processing of Lexical Tones in Mandarin-Speaking Children with Developmental Language Disorder: Electrophysiological Evidence

Autor/inn/en	Cheng, Ying-Ying; Wu, Hsin-Chi; Shih, Hsin-Yi; Yeh, Pei-Wen; Yen, Huei-Ling; Lee, Chia-Ying
Titel	Deficits in Processing of Lexical Tones in Mandarin-Speaking Children with Developmental Language Disorder: Electrophysiological Evidence
Quelle	In: Journal of Speech, Language, and Hearing Research, 64 (2021) 4, S.1176-1188 (13 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1092-4388
Schlagwörter	Mandarin Chinese; Tone Languages; Language Impairments; Developmental Disabilities; Acoustics; Brain Hemisphere Functions; Neurological Impairments; Foreign Countries; Medicine; Diagnostic Tests; Preschool Children; Auditory Discrimination; Taiwan; Wechsler Preschool and Primary Scale of Intelligence; Stanford Binet Intelligence Scale; Peabody Picture Vocabulary Test + Suchen Sie Ihr Suchwort? Tonsprache; Speech disorder; Speech disorders; Speech disabilities; Speech disability; Speech handicap; Speech handicaps; Speech impairment; Speech impairments; Language handicaps; Sprachbehinderung; Entwicklungsstörung; Akustik; Neurodegenerative Erkrankung; Ausland; Medizin; Diagnostic test; Diagnostischer Test; Pre-school age; Preschool age; Child; Children; Pre-school education; Preschool education; Vorschulalter; Kind; Kinder; Vorschulkind; Vorschulkinder; Vorschulerziehung; Vorschule
Abstract	Purpose: This study explored the neural marker indexing deficits in discriminating lexical tone changes in Mandarin-speaking children with developmental language disorders (DLDs) using mismatch negativity, an event-related potential component for auditory change detection. Mandarin has four lexical tones characterized by a high-level tone (T1), high-rising tone (T2), low-dipping tone (T3), and high-falling tone (T4), in which the T2/T3 contrast is acoustically less discriminable in developmental groups. Therefore, this study further examined how deficits in children with DLD would vary with tonal contrasts' acoustic saliency. Method: Event-related potentials were measured using the multideviant oddball paradigm described by Lee et al. (2012), who used Mandarin syllables [i] in T3 as the standard sound (80%), T1 as the large deviant (10%), and T2 as the small deviant (10%). Twelve children with DLD aged between 4 and 6 years participated in this study, and 12 age-matched children with typical development were selected from the data set of Lee et al. (2012) as the controls. Results: The T1/T3 change elicited adultlike mismatch negativity in both the DLD and control groups, while no group difference was revealed. The T2/T3 change elicited a robust positive mismatch response (P-MMR) in children with DLD, while the P-MMR was less significant in the control group. The group comparisons revealed a larger P-MMR in children with DLD than in the control group. Furthermore, children with lower scores in language assessments tend to reveal larger P-MMRs. Conclusions: This study demonstrated that deficits in children with DLD in discriminating subtle lexical tone changes reflect greater positivity of P-MMR to T2/T3 change. This implies that MMR to T2/T3 may serve as a neural marker for evaluating language delay in preschoolers. (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2024/1/01