Developmental phonological disorders. III: Long-term speech-sound normalization

J Speech Hear Res. 1994 Oct;37(5):1151-77. doi: 10.1044/jshr.3705.1151.


Prior articles in this series provide a descriptive profile of 178 children with developmental phonological disorders (Shriberg & Kwiatkowski, 1994) and predictive correlates of short-term speech-sound normalization in 54 children (Shriberg, Kwiatkowski, & Gruber, 1994). The present article reports findings from a study of 10 children with developmental phonological disorders whose progress was followed at least once yearly for 7 years. Analyses characterize the sequence, rates, and error patterns of long-term speech-sound normalization in relation to developmental perspectives on the nature of children's phonological disorders. Findings are interpreted to support the hypothesis of a critical period for speech-sound development, with long-term normalization of significant speech delay reaching a chronological age boundary at approximately 8.5 years.

Publication types

  • Research Support, U.S. Gov't, Non-P.H.S.
  • Research Support, U.S. Gov't, P.H.S.
  • Review

MeSH terms

  • Age Factors
  • Child
  • Child, Preschool
  • Cross-Sectional Studies
  • Female
  • Follow-Up Studies
  • Humans
  • Language Development Disorders / diagnosis
  • Language Development Disorders / epidemiology*
  • Language Development Disorders / physiopathology*
  • Language Development Disorders / therapy
  • Language Development*
  • Male
  • Phonation*
  • Prognosis
  • Severity of Illness Index
  • Speech Therapy
  • Time Factors
  • Treatment Outcome