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Tuesday

 

Comparison of Intelligibility Measures for Adults with Parkinson's Disease, MS and Healthy Controls: STUDY



















Image Source: JOURNALOFSPEECHLANGUAGEANDHEARINGRESEARCH


Abstract

Purpose:
This study obtained judgments of sentence intelligibility using orthographic transcription for comparison to previously reported intelligibility judgments obtained using a Visual Analog Scale (VAS) for individuals with Parkinson's disease, multiple sclerosis, and healthy controls (Tjaden, Sussman & Wilding, 2014).

Methods:
Speakers read Harvard sentences in habitual, clear, loud, and slow conditions. Sentence stimuli were equated for peak intensity and mixed with multi-talker babble. Fifty listeners orthographically transcribed sentences. Procedures were identical to those for VAS reported in Tjaden et al. (2014).

Results:
Percent correct scores from transcription were significantly higher in magnitude than 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. Lastly, intrajudge and interjudge listener reliability metrics for the two intelligibility tasks were comparable.

Conclusions:
Results suggest 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.

Story Source: The above story is based on materials provided by JOURNALOFSPEECHLANGUAGEANDHEARINGRESEARCH
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