The proposed research is designed to examine the properties of contrast adaptation in the human visual system. Contrast (pattern-selective) adaptation profoundly influences perception by adjusting sensitivity according to the pattern of stimulation to which observers are exposed. The goal of the present proposal is to investigate the changes in color perception that result from adaptation to chromatic stimuli, through psychophysical measurements on a computer-controlled color display.
Specific aims i nclude measurement and analyses of (1) how contrast adaptation influences color appearance and color constancy (the perceived color of the same surface viewed under different illuminants); (2) how these adaptation effects interact with the properties of light adaptation (to the mean luminance and chromaticity in the stimulus); and (3) how color and form perception are influenced by adaptation to spatial stimuli. Understanding these adaptation phenomena is important for understanding normal visual function, and would thus be important for understanding the implications and consequences of visual dysfunction.

Agency
National Institute of Health (NIH)
Institute
National Eye Institute (NEI)
Type
First Independent Research Support & Transition (FIRST) Awards (R29)
Project #
5R29EY010834-04
Application #
2608660
Study Section
Visual Sciences B Study Section (VISB)
Project Start
1994-12-01
Project End
1999-11-30
Budget Start
1997-12-01
Budget End
1998-11-30
Support Year
4
Fiscal Year
1998
Total Cost
Indirect Cost
Name
University of Nevada Reno
Department
Psychology
Type
Schools of Arts and Sciences
DUNS #
146515460
City
Reno
State
NV
Country
United States
Zip Code
89557
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