New Results on the Brightness Matching of Heterochromatic Stimuli

References

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• The test of significance for the hypothesis that the selected subset of observers is not different from the unselected subset of observers was as follows. A contrast was formed between the mean B/L values for the selected and unselected groups weighted by the appropriate number of observers for the other group. C = 7 Σ (B/L)i−5 Σ (B/L)j 1 to 51 to 7 i = selected observers j = unselected observers The contrast value is divided by the square root of the variance to give a value which is tested with the t-distribution. In our case, this value was significant at the 0.01 level. We conclude that the two subsets are significantly different.
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