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Temporal and non-temporal processes in the elderly.

Leah Fostick, Harvey Babkoff

    Journal of Basic and Clinical Physiology and Pharmacology
    |September 6, 2013
    PubMed
    Summary
    This summary is machine-generated.

    Age-related auditory decline specifically impacts temporal resolution, not intensity perception. This study confirms that auditory processing changes with age are confined to the temporal domain, even accounting for hearing and cognitive factors.

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    Area of Science:

    • Auditory Neuroscience
    • Human Aging Research
    • Psychoacoustics

    Background:

    • Auditory temporal resolution is reported to decline with age.
    • It remains unclear if this decline is specific to temporal processing or a general auditory perception deficit.

    Purpose of the Study:

    • To investigate the specificity of age-related decline in auditory perception.
    • To determine if auditory temporal resolution decline is limited to the temporal domain or extends to intensity perception.

    Main Methods:

    • 89 healthy participants (21-82 years) with normal hearing completed psychophysical tasks.
    • Tasks assessed discrimination in temporal and intensity domains at 40 dB SL.
    • Cognitive function was evaluated using Wechsler Adult Intelligence Scale (WAIS-III) matrices and digit span.

    Main Results:

    • Age negatively correlated with performance in temporal tasks: dichotic temporal-order judgment, spectral temporal-order judgment, and gap detection.
    • No significant correlation between age and intensity discrimination performance was found.
    • Findings highlight the specificity of age-related decline to auditory temporal resolution.

    Conclusions:

    • Age-related auditory perception changes are specific to the temporal domain.
    • This specificity holds true even when controlling for hearing sensitivity and cognitive abilities.
    • Non-temporal auditory perception, such as intensity discrimination, is not significantly affected by aging.