The Impact of Contrastive Stress on Vowel Acoustics and Intelligibility in Dysarthria

Autor/inn/en	Connaghan, Kathryn P.; Patel, Rupal
Titel	The Impact of Contrastive Stress on Vowel Acoustics and Intelligibility in Dysarthria
Quelle	In: Journal of Speech, Language, and Hearing Research, 60 (2017) 1, S.38-50 (13 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1092-4388
DOI	10.1044/2016_JSLHR-S-15-0291
Schlagwörter	Suprasegmentals; Vowels; Acoustics; Articulation Impairments; Neurological Impairments; Cerebral Palsy; Comprehension; Speech + Suchen Sie Ihr Suchwort? Akustik; Artikulationsstörung; Neurodegenerative Erkrankung; Hirnlähmung; Verstehen; Verständnis; Speaking; Sprechen
Abstract	Purpose: To compare vowel acoustics and intelligibility in words produced with and without contrastive stress by speakers with spastic (mixed-spastic) dysarthria secondary to cerebral palsy (DYS[subscript CP]) and healthy controls (HCs). Method: Fifteen participants (9 men, 6 women; age M = 42 years) with DYS[subscript CP] and 15 HCs (9 men, 6 women; age M = 36 years) produced sentences containing target words with and without contrastive stress. Forty-five healthy listeners (age M = 25 years) completed a vowel identification task of DYS[subscript CP] productions. Vowel acoustics were compared across stress conditions and groups using 1st (F1) and 2nd (F2) formant measures. Perceptual intelligibility was compared across stress conditions and dysarthria severity. Results: F1 and F2 significantly increased in stressed words for both groups, although the degree of change differed. Mean Euclidian distance between vowels also increased with stress. The relative probability of vowels falling within the target F1 × F2 space was greater for HCs but did not differ with stress. Stress production resulted in greater listener vowel identification accuracy for speakers with mild dysarthria. Conclusions: Contrastive stress affected vowel formants for both groups. Perceptual results suggest that some speakers with dysarthria may benefit from a contrastive stress strategy to improve vowel intelligibility. (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