While it is true that the color is impacted by the surrounding scene, I
don't think that is the whole picture. As I said, I think about it from a
psychophysical point of view - more specifically, here, adaptation level.
Color is impacted by the background stimuli, but there is also the key
stimulus (the focal one) and residual stimuli. There are times in which
there is just the focal stimulus (for example, the Ishihara tests and I use
this website in class http://www.toledo-bend.com/colorblind/index.html to
talk about the difficulties people with color blindness/deficiencies have
in the everyday world). In addition, the residual stimuli reminds us what
color something should be - so while the background is important, memory of
color also is going to tell people that strawberries, apples, and hearts
are red.
At 12:37 PM 9/2/2008 -0400, you wrote:
Deb Briihl wrote:
Where is color? This has been one that has been debated by scientists and
philosophers for ages. How much of something resides in the object
(primary qualities - the physics of the object) and how much of it is our
perception (secondary qualities - our experience). I think about it from
a psychophysical point of view. What is out there is not necessarily what
we perceive. In terms of color, a 500 nm light will typically be seen as
green, unless you are missing the medium wavelength cones - then you see gray.
What color one sees actually depends on the surrounding scene. See the
Horizon episode on Land's retinex theory that I was asking about the other day.
Regards,
Chris
--
Christopher D. Green
Department of Psychology
York University
Toronto, ON M3J 1P3
[EMAIL PROTECTED]
http://www.yorku.ca/christo
Office: 416-736-2100 ext. 66164
Fax: 416-736-5814
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Deb
Dr. Deborah S. Briihl
Dept. of Psychology and Counseling
Valdosta State University
Valdosta, GA 31698
(229) 333-5994
[EMAIL PROTECTED]
http://chiron.valdosta.edu/dbriihl/
Well I know these voices must be my soul...
Rhyme and Reason - DMB
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