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The unattended speech effect: perception or memory?

A Baddeley, P Salamé

    Journal of Experimental Psychology. Learning, Memory, and Cognition
    |October 1, 1986
    PubMed
    Summary
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    Unattended speech does not affect cognitive processing tasks like case or rhyme classification. However, it does impair immediate serial recall, challenging the perceptual interpretation of this effect.

    Area of Science:

    • Cognitive Psychology
    • Auditory Perception
    • Memory Research

    Background:

    • The unattended speech effect describes how irrelevant auditory information can impact cognitive tasks.
    • Broadbent (1983) proposed this effect is perceptual, not memory-related.

    Purpose of the Study:

    • To investigate whether unattended speech influences perceptual processing or memory.
    • To test Broadbent's perceptual interpretation of the unattended speech effect.

    Main Methods:

    • Participants classified visually presented consonant pairs by case or rhyme, with and without background Arabic speech.
    • A second experiment involved judging homophones of visually presented nonwords.
    • Performance was compared to an immediate serial memory task under similar auditory conditions.

    Related Experiment Videos

    Main Results:

    • Unattended speech did not affect the speed or accuracy of consonant classification (case/rhyme).
    • Performance on the homophone judgment task was also unaffected by background speech.
    • A significant impairment was observed on the immediate serial memory task due to unattended speech.

    Conclusions:

    • The findings do not support the interpretation that the unattended speech effect is purely perceptual.
    • Results suggest unattended speech impacts memory processes, not just perception.
    • This challenges existing theories on auditory distraction and cognitive load.