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Developmental and individual differences in performance on phonological synthesis tasks.

J K Torgesen1, R K Wagner, M Balthazar

  • 1Department of Psychology, Florida State University, Tallahassee 32306.

Journal of Experimental Child Psychology
|June 1, 1989
PubMed
Summary

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Children

Area of Science:

  • Child development
  • Cognitive psychology
  • Educational psychology

Background:

  • Phonological synthesis is crucial for reading development.
  • Individual differences in working memory and lexical access may influence phonological skills.
  • Age and reading ability are known factors affecting phonological task performance.

Purpose of the Study:

  • To investigate how working memory and lexical access explain age- and reading skill-related differences in phonological synthesis.
  • To compare performance on phonological synthesis tasks across different age groups and reading abilities.

Main Methods:

  • Compared 28 typically developing children (kindergarten to 2nd grade) with 28 reading-disabled 2nd graders.
  • Tested performance on sound blending tasks under four conditions: varying presentation rate (fast/slow) and stimulus type (real words/nonwords).

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Main Results:

  • Faster presentation rates and real words improved phonological synthesis performance.
  • Kindergarteners performed significantly lower than 1st and 2nd graders, indicating a developmental jump.
  • An interaction between reading group, presentation rate, and stimulus type was found in 2nd graders.

Conclusions:

  • Findings suggest that both processing speed and lexical knowledge impact phonological synthesis.
  • Results provide insights into developmental changes and reading skill differences in phonological processing.
  • The study contributes to a model of sound blending and understanding individual differences in this task.