Advantage of dichromats over trichromats in discrimination of color-camouflaged stimuli in humans

Atsuko Saito, Akichika Mikami, Takayuki Hosokawa, Toshikazu Hasegawa

    Research output: Contribution to journalArticlepeer-review

    22 Citations (Scopus)


    This study investigated whether 12 participants with color-vision deficiency had superior visual discrimination of color-camouflaged stimuli shown on a computer screen compared with 12 participants with normal trichromatic vision. Participants were asked to distinguish a circular pattern from other patterns in which textural elements differed from the background in orientation and thickness. In one condition, stimuli were single-colored, green or red; in the other condition, stimuli were color camouflaged with a green and red mosaic overlaid onto the pattern. Color-vision deficient participants selected the correct stimuli in the color-camouflaged condition as quickly as they did in the single-colored condition. However, normal color-vision participants took longer to select the correct choice in the color-camouflaged condition than in the single-colored condition. These results suggest that participants with color-vision deficiency may have a superior visual ability to discriminate the color-camouflaged stimuli.

    Original languageEnglish
    Pages (from-to)3-12
    Number of pages10
    JournalPerceptual and motor skills
    Issue number1
    Publication statusPublished - 2006 Feb 1

    ASJC Scopus subject areas

    • Experimental and Cognitive Psychology
    • Sensory Systems


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