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- Title
Very-long-term chromatic adaptation: Test of gain theory and a new method.
- Abstract
This research had two goals. First, a new method of very-long-term chromatic adaptation was compared to an older method of long-wavelength ambient illumination. In the new method, the observer viewed for 1 h per day for 12 or 14 days a CRT screen composed of oriented lines that appeared red. One observer also replicated a previous procedure (Neitz et al., 2002) in which she was exposed to long-wavelength room illumination for 4 h per day for 14 days. For both methods, equilibrium yellow was measured each day about 20 h after the end of the adaptation period. Both methods of very-long-term chromatic adaptation gave similar results. Second, shifts in equilibrium yellow were measured over a 30:1 range of light levels to determine if changes in color percepts were explained solely by a gain change in cone sensitivities (von Kries coefficient law). The magnitude of shift of equilibrium yellow depended on the level of the test light, which was not consistent with a gain theory of very-long-term chromatic adaptation.
- Subjects
LIGHT; RESEARCH; COLOR; LIGHTING; VISUAL perception
- Publication
Visual Neuroscience, 2008, Vol 25, Issue 3, p411
- ISSN
0952-5238
- Publication type
Article
- DOI
10.1017/S0952523808080450