This study investigated the acoustic correlates of contrastive stress produced by individuals with Parkinsons disease (PD) to learn more about their ability to modulate acoustic cues to mark contrastive stress. Speech materials from 10 individuals with PD and 10 gender- and age-matched neurologically healthy controls (HC) were recorded and analyzed. The four acoustic measures (peak intensity, peak F0, vowel duration, and acoustic vowel space area) of stressed and unstressed syllables were compared to determine which acoustic parameters are preferentially employed by each group to mark contrastive stress. The results indicated that individuals with PD exhibited significant changes in vowel duration and intensity of stressed/unstressed words to mark contrastive stress in similar ways to their HC counterparts. Unlike the HC group, individuals with PD did not demonstrate an expanded vowel space area (VSA) or employed changes in F0 to mark contrastive stress. Findings on which abilities are better preserved in the PD population for the purposes of marking contrastive stress add to our knowledge of prosodic deficits in this dysarthric population and can aid in the planning and executing of intervention services.
| Identifer | oai:union.ndltd.org:LSU/oai:etd.lsu.edu:etd-04132015-140713 |
| Date | 27 April 2015 |
| Creators | Gaviria, Ana Maria |
| Contributors | Oetting, Janna, Donovan, Neila, Kim, Yunjung |
| Publisher | LSU |
| Source Sets | Louisiana State University |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lsu.edu/docs/available/etd-04132015-140713/ |
| Rights | unrestricted, I hereby certify that, if appropriate, I have obtained and attached herein a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to LSU or its agents the non-exclusive license to archive and make accessible, under the conditions specified below and in appropriate University policies, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. |
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