A General Audiovisual Temporal Processing Deficit in Adult Readers with Dyslexia

Autor/inn/en	Francisco, Ana A.; Jesse, Alexandra; Groen, Margriet A.; McQueen, James M.
Titel	A General Audiovisual Temporal Processing Deficit in Adult Readers with Dyslexia
Quelle	In: Journal of Speech, Language, and Hearing Research, 60 (2017) 1, S.144-158 (15 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1092-4388
DOI	10.1044/2016_JSLHR-H-15-0375
Schlagwörter	Adults; Dyslexia; Reading; Time; Cognitive Processes; Speech; Auditory Perception; Visual Perception; Phonetics + Suchen Sie Ihr Suchwort? Dyslexics; Legasthenie; Lese-Rechtschreib-Schwäche; Leseprozess; Lesen; Zeit; Cognitive process; Kognitiver Prozess; Speaking; Sprechen; Auditive Wahrnehmung; Akustische Wahrnehmung; Akustik; Visuelle Wahrnehmung; Phonetik; Fonetik
Abstract	Purpose: Because reading is an audiovisual process, reading impairment may reflect an audiovisual processing deficit. The aim of the present study was to test the existence and scope of such a deficit in adult readers with dyslexia. Method: We tested 39 typical readers and 51 adult readers with dyslexia on their sensitivity to the simultaneity of audiovisual speech and nonspeech stimuli, their time window of audiovisual integration for speech (using incongruent /aCa/ syllables), and their audiovisual perception of phonetic categories. Results Adult readers with dyslexia showed less sensitivity to audiovisual simultaneity than typical readers for both speech and nonspeech events. We found no differences between readers with dyslexia and typical readers in the temporal window of integration for audiovisual speech or in the audiovisual perception of phonetic categories. Conclusions: The results suggest an audiovisual temporal deficit in dyslexia that is not specific to speech-related events. But the differences found for audiovisual temporal sensitivity did not translate into a deficit in audiovisual speech perception. Hence, there seems to be a hiatus between simultaneity judgment and perception, suggesting a multisensory system that uses different mechanisms across tasks. Alternatively, it is possible that the audiovisual deficit in dyslexia is only observable when explicit judgments about audiovisual simultaneity are required. (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