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Influence of visual information on the intelligibility of dysarthric speech
Connie K Keintz1, Kate Bunton, Jeannette D Hoit
1University of Arizona, Tucson, USA. ckeintz@fau.edu
Purpose:
To examine the influence of visual information on speech intelligibility for a group of speakers with dysarthria associated with Parkinson's disease.
Method:
Eight speakers with Parkinson's disease and dysarthria were recorded while they read sentences. Speakers performed a concurrent manual task to facilitate typical speech production. Twenty listeners (10 experienced and 10 inexperienced) transcribed sentences while watching and listening to videotapes of the speakers (auditory-visual mode) and while only listening to the speakers (auditory-only mode).
Results:
Significant main effects were found for both presentation mode and speaker. Auditory-visual scores were significantly higher than auditory-only scores for the 3 speakers with the lowest intelligibility scores. No significant difference was found between the 2 listener groups.
Conclusions:
The findings suggest that clinicians should consider both auditory-visual and auditory-only intelligibility measures in speakers with Parkinson's disease to determine the most effective strategies aimed at evaluation and treatment of speech intelligibility decrements.
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