Spectral Sensitivity of the Fovea II Dependence on Chromatic Adaptation

Essay Concerning Color Constancy

“…This analysis is qualitatively consistent with the way both the threshold and suprathreshold spectral luminosity functions vary in form with chromatic adaptation (Jame son & Hurvich 1953;Hurvich & Jameson 1954). Thus, for example, exposure to longwave light selectively reduces light sensitivity in the same region of the spectrum, as it should if the contribution of the longwave cone signal to light sensitivity were reduced in amplitude.…”

Successive contrast involving luminance and purity alterations of the Ganzfeld.

“…Secondly, as the data confirm, the influence of luminance upon the chromatic aspects of the postadapting field should be minor. In opponent colors theory terms, there is a white-black response process which is chiefly responsible for brightness (see also Jameson & Hurvich, 1953).…”