The Interaction of Ambient Frequency and Feature Complexity in the Diphthong Errors of Children With Phonological Disorders 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. ... Research Article
Research Article  |   December 01, 2002
The Interaction of Ambient Frequency and Feature Complexity in the Diphthong Errors of Children With Phonological Disorders
 
Author Affiliations & Notes
  • Stephanie F. Stokes, PhD
    University of Hong Kong China
  • Jessica Tse-Kay Lau
    University of Hong Kong China
  • Valter Ciocca
    University of Hong Kong China
  • Contact author: Stephanie F. Stokes, PhD, Division of Psychology, University of Northumbria at Newcastle, Newcastle upon Tyne, NE1 8ST, U.K. E-mail: s.stokes@unn.ac.uk
  • * Currently affiliated with the University of Northumbria at Newcastle, Newcastle upon Tyne, U.K.
    Currently affiliated with the University of Northumbria at Newcastle, Newcastle upon Tyne, U.K.×
Article Information
Speech, Voice & Prosodic Disorders / Cultural & Linguistic Diversity / Language / Research Articles
Research Article   |   December 01, 2002
The Interaction of Ambient Frequency and Feature Complexity in the Diphthong Errors of Children With Phonological Disorders
Journal of Speech, Language, and Hearing Research, December 2002, Vol. 45, 1188-1201. doi:10.1044/1092-4388(2002/096)
History: Received January 14, 2002 , Accepted June 24, 2002
 
Journal of Speech, Language, and Hearing Research, December 2002, Vol. 45, 1188-1201. doi:10.1044/1092-4388(2002/096)
History: Received January 14, 2002; Accepted June 24, 2002
Web of Science® Times Cited: 1

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 /i/ and /ui/ were most frequently in error, whereas /ei/, /ou/, and /u/ 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.

Acknowledgment
The authors wish to thank Ng So Sum for her help with the interrater reliability transcriptions. We are grateful to Karen Pollock for her comments on a draft of this manuscript.
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