Comparison of Intelligibility Measures for Adults With Parkinson's Disease, Adults With Multiple Sclerosis, and Healthy Controls Purpose This study obtained judgments of sentence intelligibility using orthographic transcription for comparison with previously reported intelligibility judgments obtained using a visual analog scale (VAS) for individuals with Parkinson's disease and multiple sclerosis and healthy controls (K. Tjaden, J. E. Sussman, & G. E. Wilding, 2014). Method Speakers ... Research Note
Research Note  |   April 01, 2016
Comparison of Intelligibility Measures for Adults With Parkinson's Disease, Adults With Multiple Sclerosis, and Healthy Controls
 
Author Affiliations & Notes
  • Kaila L. Stipancic
    University at Buffalo, NY
  • Kris Tjaden
    University at Buffalo, NY
  • Gregory Wilding
    University at Buffalo, NY
  • Disclosure: The authors have declared that no competing interests existed at the time of publication.
    Disclosure: The authors have declared that no competing interests existed at the time of publication. ×
  • Correspondence to Kaila L. Stipancic: kailalau@buffalo.edu
  • Editor: Jody Kreiman
    Editor: Jody Kreiman×
  • Associate Editor: Amy Neel
    Associate Editor: Amy Neel×
Article Information
Speech, Voice & Prosodic Disorders / Special Populations / Older Adults & Aging / Research Issues, Methods & Evidence-Based Practice / Speech / Research Note
Research Note   |   April 01, 2016
Comparison of Intelligibility Measures for Adults With Parkinson's Disease, Adults With Multiple Sclerosis, and Healthy Controls
Journal of Speech, Language, and Hearing Research, April 2016, Vol. 59, 230-238. doi:10.1044/2015_JSLHR-S-15-0271
History: Received August 3, 2015 , Revised October 20, 2015 , Accepted October 26, 2015
 
Journal of Speech, Language, and Hearing Research, April 2016, Vol. 59, 230-238. doi:10.1044/2015_JSLHR-S-15-0271
History: Received August 3, 2015; Revised October 20, 2015; Accepted October 26, 2015

Purpose This study obtained judgments of sentence intelligibility using orthographic transcription for comparison with previously reported intelligibility judgments obtained using a visual analog scale (VAS) for individuals with Parkinson's disease and multiple sclerosis and healthy controls (K. Tjaden, J. E. Sussman, & G. E. Wilding, 2014).

Method Speakers read Harvard sentences in habitual, clear, loud, and slow conditions. Sentence stimuli were equated for peak intensity and mixed with multitalker babble. A total of 50 listeners orthographically transcribed sentences. Procedures were identical to those for a VAS reported in Tjaden, Sussman, and Wilding (2014) .

Results The percent correct scores from transcription were significantly higher in magnitude than the VAS scores. Multivariate linear modeling indicated that the pattern of findings for transcription and VAS was virtually the same with respect to differences among groups and speaking conditions. Correlation analyses further indicated a moderately strong, positive relationship between the two metrics. The majority of these correlations were significant. Last, intrajudge and interjudge listener reliability metrics for the two intelligibility tasks were comparable.

Conclusion Results suggest that there may be instances when the less time-consuming VAS task may be a viable substitute for an orthographic transcription task when documenting intelligibility in mild dysarthria.

Acknowledgments
This work was completed as part of the first author's master's thesis. Funding was provided by the Mark Diamond Research Fund of the Graduate Student Association at the University at Buffalo, The State University of New York, Buffalo, NY (PI: Kaila L. Stipancic) and National Institute on Deafness and Other Communication Disorders, Washington, DC, Grant R01DC004689 (PI: Kris Tjaden).
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