On the basis of a more accurate calibration of the Donaldson colorimeter, a reanalysis of the 1958–1959 NRC field trials of color-matching functions was carried out. This has resulted in a revision of some of the conclusions reached with regard to the 10° color-matching functions proposed by the CIE in 1959. The results of the reanalysis strongly suggest that the proposed 10° color-matching functions predict adequately the observations made by actual observers on the Donaldson calorimeter. A failure of additivity in largefield color matching cannot be detected with certainty for the observational mean of 10 observers. However, for individual observers there remains the possibility of a failure of additivity.
GÜTNTER WYSZECKI, "Reanalysis of the NRC Field Trials of Color-Matching Functions," J. Opt. Soc. Am. 54, 710-713 (1964)