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Articulation or phonology? Evidence from longitudinal error data.

Barbara Dodd1, Sheena Reilly2,3, Kyriaki Ttofari Eecen1,4

  • 1a Audiology and Speech Pathology , University of Melbourne , Melbourne , Australia.

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Summary
This summary is machine-generated.

Many children with speech difficulties improve over time, but some develop new articulation issues later. This longitudinal study tracked speech development in children from age 4 to 7, revealing complex patterns of speech sound disorder.

Keywords:
Longitudinal studyarticulation disorderdevelopmental changephonological delayphonological disorder

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Area of Science:

  • Developmental Psychology
  • Speech-Language Pathology
  • Linguistics

Background:

  • Children's speech difficulties encompass motor (articulation) and linguistic (phonology) issues, sometimes co-occurring.
  • Longitudinal data are crucial for understanding the developmental trajectory of speech sound disorders.
  • Previous research highlights the prevalence and types of speech errors in young children.

Purpose of the Study:

  • To investigate the longitudinal progression of speech difficulties in children from 4 to 7 years of age.
  • To identify patterns of co-occurrence and resolution of articulation and phonological errors.
  • To examine unexpected changes in speech production over time.

Main Methods:

  • Longitudinal study using data from the Early Language in Victoria Study (ELVS).
  • Standardized speech assessments administered at 4 and 7 years of age.
  • Analysis of 93 children with non-age-appropriate speech errors at 4 years.

Main Results:

  • At 4 years, 85% of children had only phonological errors, while 14% had both articulation and phonological errors.
  • By 7 years, most children with combined errors resolved them, but 8 children unexpectedly developed distorted production of /s, z/ fricatives.
  • Overall, 24% of children with speech difficulties exhibited articulatory errors at one or both assessment points.

Conclusions:

  • Speech difficulties in children can show complex developmental pathways, including unexpected later-onset articulation problems.
  • The findings have significant implications for both theoretical models of speech development and clinical intervention strategies.
  • Further research is needed to understand the etiology of late-emerging articulation errors in children.