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Synesthesia is a remarkable condition where stimulation of one sensory or cognitive pathway leads to automatic, involuntary experiences in a second sensory or cognitive pathway. People with synesthesia experience a blending or crossing of their senses, such as sight and sound, leading to cross-modal sensations. In this condition, the stimulation of one sense, such as hearing a number or musical note, triggers an experience of another sense, like sensing a specific color, taste, or smell. People...
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A MULTIVARIATE MODEL OF SYNESTHESIA.

R S Lehman

    Multivariate Behavioral Research
    |January 15, 2016
    PubMed
    Summary
    This summary is machine-generated.

    This study explores auditory-visual synesthesia (chromesthesia), finding that individuals who regularly experience it can collapse their cognitive spaces differently. This difference in cognitive processing explains their unique sensory experiences.

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    Area of Science:

    • Cognitive Psychology
    • Neuroscience
    • Sensory Perception

    Background:

    • Synesthesia involves experiencing one sense through another, like hearing colors (auditory-visual synesthesia or chromesthesia).
    • Existing models suggest cognitive differences underlie synesthetic experiences.

    Purpose of the Study:

    • To propose and test a cognitive model for auditory-visual synesthesia.
    • To investigate the relationship between cognitive space collapse and synesthesia experience.

    Main Methods:

    • Developed a model with two cognitive spaces differing by a modal axis.
    • Hypothesized two subpopulations based on the ability to collapse cognitive space.
    • Subjects rated color and adjective appropriateness for musical selections.
    • Used cluster analyses to compute color and adjective spaces from ratings.

    Main Results:

    • The computed color space aligned with the three-dimensional color solid and adjective space.
    • Individuals with high synesthesia experience showed distinct color spaces compared to those with low experience.
    • Adjective spaces were identical across synesthesia experience groups.

    Conclusions:

    • The findings support the proposed cognitive model of synesthesia.
    • Differences in how individuals collapse their cognitive spaces correlate with synesthesia experience.
    • The study highlights distinct perceptual differences in color representation for synesthetes.