Another Temporal Processing Deficit in Individuals with Developmental Dyslexia: The Case of Normalization for Speaking Rate

Autor/inn/en	Gabay, Yafit; Najjar, Inaas-Jana; Reinisch, Eva
Titel	Another Temporal Processing Deficit in Individuals with Developmental Dyslexia: The Case of Normalization for Speaking Rate
Quelle	In: Journal of Speech, Language, and Hearing Research, 62 (2019) 7, S.2171-2184 (14 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1092-4388
Schlagwörter	Dyslexia; Semitic Languages; Clinical Diagnosis; Developmental Delays; Phonemes; Vowels; Language Processing; Cues; Native Language; Decision Making; Auditory Perception; Comparative Analysis; Classification; Sentences; Auditory Stimuli; Phonology + Suchen Sie Ihr Suchwort? Dyslexics; Legasthenie; Lese-Rechtschreib-Schwäche; Arabisch; Hebräisch; Entwicklungsverzögerung; Fonem; Sprachverarbeitung; Stichwort; Decision-making; Entscheidungsfindung; Auditive Wahrnehmung; Akustische Wahrnehmung; Akustik; Classification system; Klassifikation; Klassifikationssystem; Sentence analysis; Satzanalyse; Auditive Stimulation; Fonologie
Abstract	Purpose: Developmental dyslexia (DD) has mostly been attributed to arise from phonological impairments; however, several theories indicate a temporal processing deficit as the underlying cause of DD. So far, research examined the influence of temporal cues on concurrent speech sound categorization in DD, but effects of temporal information from a context (e.g., speaking rate) on the perception of subsequent sounds (i.e., "rate normalization") have not been considered. This study examined whether individuals with DD are capable of implicitly extracting temporal information embedded in context and use it for phoneme categorization to the same extent as healthy readers. Method: Fifteen individuals diagnosed with DD and 16 healthy readers, all native speakers of Hebrew, listened to context sentences followed by target words. They had to indicate whether the target word sounded more like "taam" ("taste"; a long-vowel response) or "tam" ("naïve"; a short-vowel response). Temporal information of the context was manipulated (slow vs. fast speaking rate sentences) as well as the vowel duration of the target in a 5-step continuum. Results: Listeners with DD did use the rate context to inform their decisions but to a significantly lesser extent than healthy listeners. In addition, their categorization of the vowel duration continuum was somewhat less distinct than that of the control group. Conclusions: Individuals with DD are impaired not only in tasks involving direct temporal processing, as shown in previous studies but also in the use of temporal information of a context that impacts the perception of subsequent target words. This inability to fully utilize rate normalization processes may influence the formation of abstract phonological representations in individuals with DD. (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