Title
The effect of rate control on speech rate and intelligibility of dysarthric speech The effect of rate control on speech rate and intelligibility of dysarthric speech
Author
Faculty/Department
Faculty of Sciences. Physics
Faculty of Medicine and Health Sciences
Publication type
article
Publication
Basel ,
Subject
Human medicine
Source (journal)
Folia phoniatrica et logopaedica. - Basel, 1994, currens
Volume/pages
61(2009) :2 , p. 69-75
ISSN
1021-7762
ISI
000266098200001
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Purpose: This study investigated the effect of rate control methods (RCMs) on speaking rate (SR), articulation rate (AR), and intelligibility in dysarthric speakers. Method: Nineteen dysarthric patients (7 unilateral upper motor neuron dysarthria, 6 hypokinetic, 3 flaccid, 3 ataxic) participated. SR, AR and intelligibility ratings were determined on the basis of 1-min recorded reading passages. Seven RCMs were applied: voluntary rate control, hand tapping, alphabet board, pacing board and delayed auditory feedback with a delay of 50, 100 and 150 ms. Results: Almost all methods resulted in lower mean SRs and ARs (p < 0.05). Rate control did not improve overall intelligibility of the dysarthric population. However, a meaningful increase of intelligibility was found in 5 participants. This study indicates that the effect of rate control on intelligibility is independent of habitual speech rate and type of dysarthria. Degree of intelligibility may be an influencing factor. The most effective methods are: voluntary rate control, alphabet board, hand tapping and pacing board. Conclusion: RCMs do result in lower speech rates. Some dysarthric individuals do benefit from one or more RCMs, but rate control may also have an inverse effect on intelligibility.
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