Sensation _ Perception - lecture 13 - individual differences in color vision _ color phenomena

Sensation _ Perception - lecture 13 - individual differences in color vision _ color phenomena

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Individual Differences in Color Vision and Color Phenomena Lecture 13
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Color Vision Deficiences The Statistics:. About 8% of males have a red-green color deficiency compared to approximately 0.4% of females (Birch 2001). Color vision deficiencies are linked to X chromosome.
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Anomalous Trichromat Most common form of color vision deficiency. Has all three cone systems but one has an abnormal absorption spectrum. Depending on the nature of the abnormality, the person may experience mild impairment or a more severe impairment. Color Vision Deficiencies
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Anomalous Trichromat Protoanomalous  affects L-cones, insensitive to red-green. Deuteranomalous  affects M-cones, insensitive to red-green. Tritanomalous  affects S-cones, insensitive to yellow-blue. Color Vision Deficiencies
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Dichromat A person who has only two of three cones systems. Needs only two primary colors to match any target color. Can see colors but range is narrow. Color Vision Deficiencies
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Dichromats Protanope Have no L-cones, insensitive to red-green. Have typical number of S-cones and an increased number of M-cones. Deuteranope Have no M-cones, insensitive to red-green. Have typical amount of S-cones and L-cones. Have fewer cones than normal. Color Vision Deficiencies
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Color Vision Deficiencies
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Monochromat Requires only one color to match perception of all other colors. Person’s world is similar to that of a trichromat.
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Sensation _ Perception - lecture 13 - individual differences in color vision _ color phenomena

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