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Journal of Speech, Language, and Hearing Research Vol.43 1451-1465 December 2000.
© American Speech-Language-Hearing Association
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Perceptual-Phonetic Predictors of Single-Word Intelligibility

A Study of Cantonese Dysarthria

Tara L. Whitehill 1
Valter Ciocca 1
1 University of Hong Kong China

tara{at}hku.hk

This study investigated the perceptual-phonetic predictors of intelligibility in Cantonese speakers with dysarthria. The speakers were 20 young adults with cerebral palsy. The listener group consisted of 12 native Cantonese speakers. A single-word intelligibility test was constructed, based on 17 phonetic contrasts. There were no significant differences in intelligibility for gender, age, or type of cerebral palsy. A regression analysis showed that intelligibility could be predicted with 97% accuracy by 5 out of the 6 most problematic contrasts. Three contrasts (glottal vs. null, final vs. null, and long vs. short vowel) predicted variation on an independent intelligibility measure obtained for the same speakers with 84% accuracy. Principal components analysis derived 4 components, which accounted for 81% of the variance in the 17 contrasts. Physiological explanations and language-specific contributions to speech disorder in this group of speakers are discussed.

KEY WORDS: intelligibility, cerebral palsy, dysarthria, Cantonese, Chinese

Submitted on October 25, 1999
Accepted on March 27, 2000


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