People perceive color by means of certain photopigments in the retina that are sensitive to certain wavelengths of light. ██████ ███ ███ ███████████ ███ ██████ ██ ███████████ ███████ ███ ███ ██████ ███ ████████ ███ ██ ██ ███████ ██ ███████ ██████████████ ████ ██ █████████ ██ ████████ ████████ ██ ████ ██ █ █████ ██ ██████ ███ ██████ ███████████ ███ ████ ██████ ██ ██ ██ ███████ ██████ ██ ██████ ████████████ ███████ ████ ██████ ██ ███ ████ ███ ████████ ██ ███ ████████ ████ ████ ██ ████████████
Why did 10 to 20 percent of people who could easily distinguish red from green fail to report a distinction between many shades of red that the majority of people who could distinguish red from green were able to distinguish?
The correct answer will be the only answer that doesn’t help explain the phenomenon where 10 to 20 percent of people who could easily distinguish red from green failed to report a distinction between many shades of red. The correct answer must give us information that doesn’t affect our understanding of the phenomenon or information that makes the phenomenon more difficult to explain.
Each of the following, if █████ █████ ██ ███████ ███ ██████ ██ ███ █████ █████ █████ ███████
People with abnormally ███ ██████████████ ██ ███ █████████████ ███ ██████████ ███ ███ ████████ █████ ██████ ██ ███ ████ ██████ ████ ██████ ███████████████
This could account for the non-colorblind people who were unable to distinguish between certain shades of red. They may have had an abnormally low concentration of the photopigments for perceiving red.
Questions that ask ████████ ██ ███████████ ███████ █████████ ██████ ██ ███ ████ █████ ███ █████████ ██ ██████ ████ ████████ ████████
If these sorts of questions are difficult to phrase clearly, the non-colorblind people who failed to distinguish between certain shades of red may have actually been able to distinguish between the shades but just misunderstood the questions they were being asked.
Some people are ████████████ ██ ████ ██████████ ██ █████ ███ ████ ██ ██████ ██ ██████ ███████████ ████ ██ ███ ████ ██████
If (C) is true, the people who failed to distinguish between the various shades of red may have actually been able to distinguish between the shades but just didn’t care enough about the distinctions to notice them or report them.
Some people are ██████ ██ ███████████ ███ ████ █████ ███ ██ ██ ███████ ██ ███ ██████ ██ ███ ████████████ █████████ ██ ██████
Reasons why some people can’t distinguish red from green are irrelevant. We need to know why 10 to 20 percent of the people who are capable of distinguishing red from green failed to distinguish between many shades of red.
Some people fail ██ ██████ ████████████ ███████ ███████ ██████ ██ ███ ███████ ████ ████ ███ █████ ███ █████ ███████
If (E) is true, the people who failed to distinguish between the various shades of red may have actually been able to distinguish between the shades but just didn’t know the words necessary to report the distinctions.
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