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Color categories in macaques.

J H Sandell, C G Gross, M H Bornstein

    Journal of Comparative and Physiological Psychology
    |August 1, 1979
    PubMed
    Summary
    This summary is machine-generated.

    Macaque monkeys perceive colors similarly to humans, categorizing the light spectrum into basic hues like blue, green, yellow, and red. This suggests shared color vision principles across species.

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    Area of Science:

    • Comparative psychology
    • Primate vision
    • Color perception

    Background:

    • Human color perception is organized into basic hue categories: blue, green, yellow, and red.
    • Understanding animal color vision provides insights into the evolution of visual systems.

    Purpose of the Study:

    • To determine if macaque monkeys categorize the visible light spectrum into the same four basic hue categories as humans.
    • To investigate cross-species similarities in color categorization.

    Main Methods:

    • Monkeys were trained to respond to specific chromatic stimuli.
    • Generalization of responses was tested using different spectral stimuli in extinction trials.
    • Response levels were analyzed to infer color category boundaries.

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    Main Results:

    • Monkeys showed high response levels to stimuli within the same human hue category as the training stimulus.
    • Response levels were significantly lower for stimuli in different human hue categories.
    • Behavioral data indicated distinct color categories in macaques.

    Conclusions:

    • Macaque monkeys partition the photic spectrum into at least four basic hue categories, mirroring human color categorization.
    • These findings suggest a shared evolutionary basis for color vision and categorization in primates.
    • The study provides evidence for similar spectral organization in macaque and human color perception.