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Intensity perception. XIII. Perceptual anchor model of context-coding.

L D Braida, J S Lim, J E Berliner

    The Journal of the Acoustical Society of America
    |September 1, 1984
    PubMed
    Summary

    This study revises the context-coding mode of intensity resolution, introducing a new model that explicitly describes sensation coding relative to perceptual anchors and predicts a resolution edge effect.

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    Area of Science:

    • Auditory Perception
    • Psychoacoustics
    • Sensory Neuroscience

    Background:

    • Previous models of intensity resolution proposed trace and context-coding modes of memory.
    • The context-coding mode involves coding sensations relative to internal references or perceptual anchors.

    Purpose of the Study:

    • To present a revised model of the context-coding mode for intensity resolution.
    • To explicitly describe the process of sensation coding relative to context.
    • To predict a resolution edge effect.

    Main Methods:

    • Development of a revised mathematical model for the context-coding mode.
    • Analysis of the model's predictions for one-interval and fixed-level two-interval paradigms.
    • Derivation of parameter estimates for the revised model.

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    Main Results:

    • The revised model explicitly describes sensation coding relative to perceptual anchors.
    • The model predicts a resolution edge effect.
    • Probability density functions in the revised model are not precisely Gaussian.

    Conclusions:

    • The revised context-coding model offers a more detailed account of intensity resolution.
    • The model's predictions are outlined for specific experimental paradigms.
    • Parameter estimation provides quantitative insights into the model's mechanisms.