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Clarity-Related Changes in Acoustic Measures of Intonation and Speech Timing in Read and Extemporaneous Speech of Speakers with Parkinson Disease

Gravelin, Anna Christine
http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1626865962035445

Abstract Details

2021, Doctor of Philosophy (Ph.D.), Bowling Green State University, Communication Disorders.
The purpose of the current study was to determine the extent to which a clear speech instruction would modulate acoustic measures of intonation and speech timing in speakers with and without PD in reading and extemporaneous speech tasks. Speakers both read simple reading passages and responded to self-selected extemporaneous speech prompts. Participants first performed the reading and extemporaneous speech tasks in a habitual manner, and then a second time in a clearer than usual style following an instruction to “over-enunciate each word.” The speech samples were parsed using a process specified by the Systemic Theory of Functional Linguistics and further analyzed acoustically for measures of intonation and speech timing. Results revealed that speakers with PD presented with overall less variation in fundamental frequency and slower falling and rising fundamental frequency contours than controls regardless of speaking style. Speakers with PD exhibited significantly less clarity-related reduction in articulation rate than controls for both speaking tasks. For the reading task, all speakers exhibited clarity-related reduction in articulation rate. For the extemporaneous task, only control speakers exhibited clarity-related changes in articulation rate and pause durations, whereas speakers with PD exhibited no change in articulation rate between the habitual and clear speech styles. These results may indicate that speakers with PD exhibited a less robust clear speech response than controls. Additionally, it is possible that the higher cognitive-linguistic load of the extemporaneous task interfered with the magnitude of the clear speech response. Together, the demands of generative language and clear speech production associated with the extemporaneous task may have reduced some of the clear speech benefits for speakers in the PD group.
Jason Whitfield, Ph.D. (Advisor)
Ronald Scherer, Ph.D. (Committee Member)
Brent Archer, Ph.D. (Committee Member)
Adam Fullenkamp, Ph.D. (Committee Member)
Laura Sanchez, Ph.D. (Other)
166 p.
Speech Therapy
Parkinson disease; clear speech; intonation; speech timing

Recommended Citations

Citations

  • Gravelin, A. C. (2021). Clarity-Related Changes in Acoustic Measures of Intonation and Speech Timing in Read and Extemporaneous Speech of Speakers with Parkinson Disease [Doctoral dissertation, Bowling Green State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1626865962035445

    APA Style (7th edition)

  • Gravelin, Anna. Clarity-Related Changes in Acoustic Measures of Intonation and Speech Timing in Read and Extemporaneous Speech of Speakers with Parkinson Disease. 2021. Bowling Green State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1626865962035445.

    MLA Style (8th edition)

  • Gravelin, Anna. "Clarity-Related Changes in Acoustic Measures of Intonation and Speech Timing in Read and Extemporaneous Speech of Speakers with Parkinson Disease." Doctoral dissertation, Bowling Green State University, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1626865962035445

    Chicago Manual of Style (17th edition)

bgsu1626865962035445
258
© 2021, some rights reserved.Creative Commons License Clarity-Related Changes in Acoustic Measures of Intonation and Speech Timing in Read and Extemporaneous Speech of Speakers with Parkinson Disease by Anna Christine Gravelin is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by Bowling Green State University and OhioLINK.