Lec6Feb7 - From end of February 5 2008 1 Do different people perceive color differently How would we know 2 What do color deficient people see when

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From end of February 5, 2008 1. Do different people perceive color differently? How would we know? 2. What do color deficient people see when we see red, green, blue?
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Color Deficiencies
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How do you know what a color deficient person sees? Naming won’t do Colors differ in luminance (intensity) and one can easily learn different labels for different shades. Use equiluminant colors Ishihara test: Numbers made from colored dots embedded in a background of colored dots. All dots are equal in intensity. The number stands out because of change in color not luminance
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Ishihara Color Vision Test A through H
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A
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B
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C
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D
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E
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F
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G
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H
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Ishihara Color Blindness Test Slide Normal Color Vision Red/Green Color Blind A 25 25 B 29 Spots C 45 Spots D 56 56 E 6 Spots F 8 Spots G 5 2 H 7 Spots
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How do you know what a color deficient person sees? Do a color matching experiment Ask someone who has a color deficiency in one eye but not the other to match colors seen in color deficient eye
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Dichromats Can match any test light by adjusting the intensity of any two other wavelengths
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- long - medium - short Types of Dichromats 1% M, .02% F 1% M, .01% F .002% M, 001% F Green
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This note was uploaded on 04/30/2008 for the course PSYC 329 taught by Professor Peterson during the Spring '08 term at University of Arizona- Tucson.

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Lec6Feb7 - From end of February 5 2008 1 Do different people perceive color differently How would we know 2 What do color deficient people see when

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