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Do auditory perceptual asymmetries develop?

M P Bryden, F A Allard

    Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
    |July 1, 1981
    PubMed
    Summary
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    School-age children show a consistent right-ear advantage in dichotic listening for verbal stimuli. Attentional biases contribute to this effect, but a genuine perceptual advantage for the right ear remains.

    Area of Science:

    • Neuroscience
    • Developmental Psychology
    • Auditory Perception

    Background:

    • Dichotic listening tasks assess brain hemisphere specialization for auditory processing.
    • Previous research suggests age-related changes in auditory laterality effects.

    Purpose of the Study:

    • To investigate dichotic listening performance in school-age children.
    • To examine the role of attentional biases in auditory laterality effects.
    • To determine if age influences right-ear advantage for verbal and non-verbal stimuli.

    Main Methods:

    • Two studies utilized dichotic listening with school-age children.
    • Materials included number lists, nonsense syllables, words, and environmental sounds.
    • Attentional deployment was manipulated through free recall and instructional control.

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    Main Results:

    • A significant right-ear advantage was observed for all verbal stimuli (numbers, syllables, words).
    • No laterality effects were found for environmental sounds.
    • Attentional biases towards the right were identified, partially explaining the laterality effect.

    Conclusions:

    • A right-ear perceptual advantage for verbal material is present in children.
    • Attentional biases contribute to, but do not fully account for, observed laterality effects.
    • No evidence suggests age-related changes in this right-ear advantage for verbal stimuli.