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Norma Graham

Explore the profile of Norma Graham including associated specialties, affiliations and a list of published articles. Areas
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Articles 5
Citations 16
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Recent Articles
1.
Wolfson S, Graham N
J Vis . 2009 Sep; 9(4):30.1-23. PMID: 19757939
We present psychophysical results demonstrating the interaction of two contrast adaptation processes in human vision: (1) A contrast-gain-control process of the normalization type and (2) a recently-discovered shifting, rectifying contrast-comparison...
2.
Wolfson S, Graham N
J Vis . 2007 Aug; 7(8):12. PMID: 17685819
We have found an unusual kind of contrast adaptation in human pattern vision that seems fundamentally different from previously reported effects. As the observer adapts to different levels of contrast,...
3.
Wolfson S, Graham N
J Vis . 2006 Nov; 6(10):1026-46. PMID: 17132075
Here we examine results from 44 years of probed-sinewave experiments investigating the dynamics of light adaptation. We also briefly examine four models that have been tested against the results. In...
4.
Wolfson S, Graham N
Spat Vis . 2005 Apr; 18(2):209-26. PMID: 15856937
In his long years of studying visual perception, Jacob Beck made many contributions. This article is a short review of one line of his research--that we shared in--and then a...
5.
Graham N, Wolfson S
Vision Res . 2004 Oct; 44(27):3145-75. PMID: 15482802
Is there opponency between orientation-selective processes in pattern perception, analogous to opponency between color mechanisms? Here we concentrate on possible opponency in second-order channels. We compare several possible second-order structures:...