Transcript
Hannah Pando
5.2 Suppose a person with only one type of cone is shown two monochromatic lights of different wavelengths but with the same physical intensity. Does the person, who is truly color-blind, necessarily see the two lights as identical? Why or why not?
ANSWER: No, the person would not see the two lights as identical. Changes in the wavelength of light are indistinguishable from the changes in intensity. Everything will appear as a shade of grey, but would be different shade of grade depending on the color’s wavelength.
5.7 Color constancy is a sort of perceptual error, but it typically works to our advantage. Think of a situation in which we’d be better off not having color constancy, and explain why.
ANSWER: An example of when we would be better off not having color constancy is when we are trying to identify the color of an object with different filters on it. If we know an apple is supposed to be red, when a gray filter is placed over the apple, the human mind will perceive the apple as red still. This accurately portrays the picture and deceives us as to what we are actually looking at.
5.8 Do you think a brain injury would be more likely to result in a color vision deficiency resembling monochromacy or dichromacy? Explain your answer.
ANSWER: I believe that if someone suffered a brain injury and resulted in some type of color vision, it would most likely resemble dichromacy. This is a condition in which “a person has only two types of cones, instead of the normal three; in all such cases, the person has limited form of color vision but cannot discriminate as many colors as a person with all three cone types. I believe that this would be the result of a brain injury because depending on the severity, I don’t believe one’s rods would completely stop working or have all rods working and only one type of cone functioning. Areas such as the V4, the temporal, and occipital lobes are large areas that contribute to the perception of color, so if anything were to happen to these areas, color perception would be permanently altered.
