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Auditory-visual speech integration by adults with and without language-learning disabilities.

Linda W Norrix1, Elena Plante, Rebecca Vance

  • 1Department of Speech and Hearing Sciences, University of Arizona, P.O. Box 210071, Tucson, AZ 85721-0071, USA. norrix@email.arizona.edu

Journal of Communication Disorders
|June 14, 2005
PubMed
Summary

Adults with language-learning disabilities (LLD) show slower auditory-visual speech perception. They also exhibit poorer integration of mismatched auditory and visual speech cues, similar to children with LLD.

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Area of Science:

  • Neuroscience
  • Speech and Hearing Science

Background:

  • Auditory-visual speech perception integrates auditory and visual cues for enhanced comprehension.
  • Language-learning disabilities (LLD) may impact multisensory speech processing.

Purpose of the Study:

  • To investigate auditory and auditory-visual speech perception in adults with and without LLD.
  • To examine group differences in processing congruent and incongruent auditory-visual speech stimuli.

Main Methods:

  • Participants included adults with and without LLD.
  • Auditory and auditory-visual consonant-vowel syllables (congruent and McGurk) were presented.
  • Identification accuracy and reaction times were measured.

Main Results:

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  • Adults with LLD had longer reaction times for all syllable types compared to controls.
  • Adults with LLD showed significantly fewer integration (McGurk) responses.
  • Auditory and congruent auditory-visual syllable identification was comparable between groups.

    • Conclusions:

    • Adults with LLD exhibit slower speech processing.
    • Poor auditory-visual speech integration, seen in children with LLD, persists into adulthood.
    • LLD affects the ability to integrate mismatched auditory and visual speech information.