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dc.contributor.authorMefferd, Antje S.
dc.contributor.authorCorder, Erin E.
dc.date.accessioned2015-02-19T21:04:35Z
dc.date.available2015-02-19T21:04:35Z
dc.date.issued2014-04
dc.identifier.citationMefferd, Antje S.; Corder, Erin E. 2014. Assessing articulatory speed performance as a potential factor of slowed speech in older adults. Journal of Speech, Language, and Hearing Research, April 2014:vol. 57:no.2:pp 347-360en_US
dc.identifier.issn1092-4388
dc.identifier.otherWOS:000348195600008
dc.identifier.urihttp://dx.doi.org/10.1044/2014_JSLHR-S-12-0261
dc.identifier.urihttp://hdl.handle.net/10057/11093
dc.descriptionClick on the DOI link to access the article (may not be free).en_US
dc.description.abstractPurpose: To improve our understanding about the underlying factors of aging-related speaking rate decline, the authors sought to determine if lip and jaw speeds are physiologically constrained in older adults. Method: Thirty-six females-10 young adults (ages 22-27 years), 9 middle-aged adults (ages 45-55 years), 10 young-old adults (65-74 years), and 7 very old adults (ages 87-95 years)completed metronome-paced syllable repetitions while moving the lower lip or jaw to a fixed target with each repetition. Metronome paces incrementally increased from 1.4 Hz to 6.7 Hz. Lip and jaw movements were tracked using a 3-dimensional motion capture system. Results: Older adults' maximum percent increase in lip and jaw peak speed was comparable to or tended to be even greater than that of middle-aged and young adults. By contrast, lip and jaw stiffness, indexed by peak speed-displacement ratios, tended to decrease with age during fast and very fast repetition rates and were associated with mildly prolonged movement durations. Conclusions: The findings suggest that lip and jaw speeds are not constrained in older adults. The trend of reduced stiffness during fast rates, however, suggests that fine-force regulation becomes difficult for older adults. Thus, older adults may implement reduced habitual speaking rates as a behavioral strategy to compensate for diminished articulatory control.en_US
dc.description.sponsorshipAmerican Speech-Language-Hearing Association (ASHA) Advancing Academic Research Careers (AARC) mentoring grant, provided to the first author.en_US
dc.language.isoen_USen_US
dc.publisherAmerican Speech-Language-Hearing Associationen_US
dc.relation.ispartofseriesJournal of Speech Language and Hearing Research;v.57:no.2
dc.subjectAgingen_US
dc.subjectSpeech motor controlen_US
dc.subjectPhysiologyen_US
dc.titleAssessing articulatory speed performance as a potential factor of slowed speech in older adultsen_US
dc.typeArticleen_US
dc.rights.holder© American Speech-Language-Hearing Association


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