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The distribution of color matches about a color center is investigated. Pearson’s χ2 test is used, and the data are found to be normally distributed. A comparison is made between the observed variations of g11, g22, and g33, the principal terms of the color-discrimination tensor, and the variations expected from statistical theory. The experimental and theoretical variations are found to agree very closely. Recently published values of gik are shown to be too small by a factor of two. The reproducibility of color-discrimination ellipsoids, determined from sets of thirty color matches, is shown.
W. R. J. Brown (Tue,) studied this question.