Discrimination of Color II Sensitivity as a Function of Spectral Wavelength, 510 to 630 mμ*

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Abstract
The study reports the experimental determination of just noticeable differences in color as dependent upon wavelength at 10-mμ steps from 510 to 630 mμ. The method of constant-stimulus differences was used to produce limens in terms of measures both of central tendency and of dispersion of judgments. The data have been analyzed to determine the different functional relationships between various colors and wavelengths. Peak sensitivity was found in the yellow region of the spectrum. The results were discussed in terms of methodological differences between the present and earlier studies and were applied to psychologically unique colors.

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