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Related Experiment Videos

Are speech perception deficits associated with developmental dyslexia?

F R Manis1, C Mcbride-Chang, M S Seidenberg

  • 1Psychology Department, University of Southern California, Los Angeles, CA 90089-1061, USA. manis@almaak.usc.edu

Journal of Experimental Child Psychology
|August 1, 1997
PubMed
Summary

Some children with dyslexia exhibit impaired phonological processing and categorical perception, potentially impacting reading development. This speech perception deficit may be linked to limited reading experience.

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Area of Science:

  • Cognitive Psychology
  • Developmental Neuroscience
  • Speech and Hearing Sciences

Background:

  • Dyslexia is a common neurodevelopmental disorder affecting reading acquisition.
  • Phonological processing is crucial for reading, and deficits are often observed in dyslexia.
  • Categorical perception of speech sounds is a fundamental aspect of auditory processing.

Purpose of the Study:

  • To investigate phonological awareness and categorical perception in children with dyslexia.
  • To compare dyslexic children to age-matched and reading-level-matched control groups.
  • To explore the relationship between phonemic awareness, speech perception, and reading experience.

Main Methods:

  • Administered phonological awareness and phoneme identification tasks.

Related Experiment Videos

  • Assessed categorical perception of a voice onset time (VOT) continuum (/b/-/p/).
  • Compared dyslexic children to chronological age (CA) and reading-level (RL) comparison groups.

    • Main Results:

    • Dyslexic children showed less precise categorical perception of the /b/-/p/ continuum compared to the CA group.
    • Dyslexics with low phonemic awareness exhibited poorer /b/-/p/ discrimination than both control groups.
    • A higher proportion of dyslexic children (7/25) displayed abnormal speech perception functions than controls.

    Conclusions:

    • Some children with dyslexia may possess a perceptual deficit affecting phonological information processing.
    • Speech perception difficulties in dyslexia could be partially influenced by reading experience.
    • Findings highlight the importance of auditory processing in reading development for dyslexic individuals.