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Related Experiment Videos

The size-color illusion

W H Tedford, S L Bergquist, W E Flynn

    The Journal of General Psychology
    |July 1, 1977
    PubMed
    Summary
    This summary is machine-generated.

    Color hues influence perceived size, with red-purple appearing largest and green smallest. Lower color saturation also increases apparent size, impacting visual perception studies.

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    Area of Science:

    • Visual perception
    • Color science
    • Psychophysics

    Background:

    • Apparent size can be influenced by various visual factors beyond physical dimensions.
    • Color properties like hue, chroma, and intensity are known to modulate visual perception.

    Purpose of the Study:

    • To investigate the effect of color properties on the perceived size of visual stimuli.
    • To determine if specific Munsell hues or chroma levels alter apparent size.

    Main Methods:

    • A direct-comparison, forced-choice procedure was employed.
    • 100 volunteers (male and female) from psychology courses participated.
    • Stimuli consisted of Munsell color chips varying in size, hue, and chroma, with constant intensity.

    Main Results:

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    • When size and chroma were constant, apparent size order was red-purple > yellow-red > purple-blue > green.
    • This hue-based size perception was significant at chroma/8, with a minor exception.
    • At chroma/4, the same order persisted but was less pronounced.
    • Slides with lower chroma (higher saturation) appeared significantly larger than those with higher chroma (less saturation).

    Conclusions:

    • Color hue demonstrably affects perceived size, with certain hues appearing larger than others.
    • Color saturation plays a significant role in apparent size perception, with less saturated colors appearing larger.