Owing to the fact that color blindness is seemingly quite an intangible phenomenon and that there are several theories, one of which has often been accepted by the experimenter so that the results are usually somewhat biased, we find that the results vary quite considerably when tests are made by the different methods.
Proceedings of the Iowa Academy of Science
©1934 Iowa Academy of Science, Inc.
Benedict, A. A.
"Psychophysical Analysis of Color Blindness,"
Proceedings of the Iowa Academy of Science, 41(1), 248-248.
Available at: https://scholarworks.uni.edu/pias/vol41/iss1/75