Voice Onset Time in Individuals with Hyperfunctional Voice Disorders: Evidence for Disordered Vocal Motor Control

Autor/inn/en	McKenna, Victoria S.; Hylkema, Jennifer A.; Tardif, Monique C.; Stepp, Cara E.
Titel	Voice Onset Time in Individuals with Hyperfunctional Voice Disorders: Evidence for Disordered Vocal Motor Control
Quelle	In: Journal of Speech, Language, and Hearing Research, 63 (2020) 2, S.405-420 (16 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1092-4388
Schlagwörter	Voice Disorders; Correlation; Psychomotor Skills; Vowels; Phonemes; Females; Comparative Analysis; Auditory Discrimination; Speech Communication + Suchen Sie Ihr Suchwort? Stimmstörung; Korrelation; Psychomotorische Aktivität; Fonem; Weibliches Geschlecht
Abstract	Purpose: This study examined vocal hyperfunction (VH) using voice onset time (VOT). We hypothesized that speakers with VH would produce shorter VOTs, indicating increased laryngeal tension, and more variable VOTs, indicating disordered vocal motor control. Method: We enrolled 32 adult women with VH (aged 20-74 years) and 32 age- and sex-matched controls. All were speakers of American English. Participants produced vowel-consonant-vowel combinations that varied by vowel (?/u) and plosive (p/b, t/d, k/g). VOT--measured at the release of the plosive to the initiation of voicing--was averaged over three repetitions of each vowel-consonant-vowel combination. The coefficient of variation (CoV), a measure of VOT variability, was also computed for each combination. Results: The mean VOTs were not significantly different between the two groups; however, the CoVs were significantly greater in speakers with VH compared to controls. Voiceless CoV values were moderately correlated with clinical ratings of dysphonia (r = 0.58) in speakers with VH. Conclusion: Speakers with VH exhibited greater variability in phonemic voicing targets compared to vocally healthy speakers, supporting the hypothesis for disordered vocal motor control in VH. We suggest future work incorporate VOT measures when assessing auditory discrimination and auditory-motor integration deficits in VH. (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	2024/1/01