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The interaction of ambient frequency and feature complexity in the diphthong errors of children with phonological disorders

Lookup NU author(s): Professor Stephanie Stokes


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This study examined the interaction of ambient frequency and feature complexity in the diphthong errors produced by Cantonese-speaking children with phonological disorders. A total of 611 diphthongs produced by 13 Cantonese-speaking children with speech disorders were subjected to perceptual analysis. The percentage accuracy of production and error patterns was examined. Perceptual analysis showed that /oi/ and /ui/ were most frequently in error, whereas /ei/, /ou/, and /eu/ were least frequently in error. Diphthong errors (usually diphthong reduction) arise as a function,of both ambient frequency and feature complexity. The combination of ambient frequency and feature complexity yields a complexity metric reflecting accuracy of production. Treatment guidelines include consideration of three basic factors: ambient frequency, feature complexity and error patterns.

Publication metadata

Author(s): Stokes SF; Lau JTK; Ciocca V

Publication type: Article

Publication status: Published

Journal: Journal of Speech, Language, and Hearing Research

Year: 2002

Volume: 45

Issue: 6

Pages: 1188-1201

ISSN (print): 1092-4388

ISSN (electronic): 1558-9102

Publisher: American Speech - Language - Hearing Association


DOI: 10.1044/1092-4388(2002/096)


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