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Cognitive effects in dichotic speech testing in elderly persons.

M Hällgren1, B Larsby, B Lyxell

  • 1Department of Neuroscience and Locomotion, Linköping University, Sweden.

Ear and Hearing
|April 28, 2001
PubMed
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Chronologic age negatively impacts central auditory functions, particularly in the elderly. Age-related cognitive decline is strongly linked to difficulties in perceiving left-ear auditory stimuli during dichotic listening tests.

Area of Science:

  • Auditory Neuroscience
  • Cognitive Psychology
  • Gerontology

Background:

  • Central auditory functions, crucial for speech comprehension, can be affected by aging.
  • Dichotic speech tests are valuable tools for assessing auditory processing and hemispheric asymmetry.
  • Cognitive abilities, such as processing speed and memory, may influence auditory performance in older adults.

Purpose of the Study:

  • To investigate the impact of chronologic age on central auditory functions using dichotic speech tests.
  • To determine the relationship between age-related changes in dichotic listening and cognitive abilities.

Main Methods:

  • Dichotic speech tests (digits, sentences, syllables) and cognitive tests were administered to 30 hearing-impaired adults (42-84 years).
  • Participants were divided into older (n=15) and younger (n=15) groups.

Related Experiment Videos

  • Cognitive tests assessed short-term memory, processing speed, and phonologic processing.

    • Main Results:

    • Older adults exhibited decreased performance across all dichotic speech tests.
    • Older subjects showed poorer left-ear performance in syllable tests compared to younger subjects.
    • Age-related declines in cognitive tests correlated with dichotic test results, especially for left-ear stimuli.

    Conclusions:

    • Chronologic age significantly affects central auditory functions in the elderly, as evidenced by dichotic speech test performance.
    • The extent of age-related effects in dichotic listening depends on test material, reporting method, and ear focus.
    • Age-related cognitive decline is strongly associated with impaired perception of left-ear auditory stimuli.