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Detection of direction of contrast

L. Weiskrantz

in Blindsight: A Case Study and Implications

Published in print:
1990
Published Online:
January 2008
ISBN:
9780198521921
eISBN:
9780191706226
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780198521921.003.0012
Subject:
Psychology, Cognitive Neuroscience

D. B. acknowledged having some sort of impression or feeling when a stimulus was abruptly presented, but failed to ascribe any sense of ‘brightness’ to the experience. This led to the question of ... More


Theories of Lightness

Alan Gilchrist

in Seeing Black and White

Published in print:
2006
Published Online:
September 2007
ISBN:
9780195187168
eISBN:
9780199786725
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780195187168.003.0012
Subject:
Psychology, Clinical Psychology

This chapter outlines and critiques all the main theories of lightness, laying out the strengths and weaknesses of each. These include the past experience theories, contrast theories, brightness ... More


Light and the Optical Environment

Thomas W. Cronin, Sönke Johnsen, N. Justin Marshall, and Eric J. Warrant

in Visual Ecology

Published in print:
2014
Published Online:
October 2017
ISBN:
9780691151847
eISBN:
9781400853021
Item type:
chapter
Publisher:
Princeton University Press
DOI:
10.23943/princeton/9780691151847.003.0002
Subject:
Biology, Evolutionary Biology / Genetics

This chapter explains how humans, and nearly all animals on Earth, witness astonishing variation in their optical environment. Brightness changes by many orders of magnitude each day, and colors also ... More


An Anchoring Model of Errors

Alan Gilchrist

in Seeing Black and White

Published in print:
2006
Published Online:
September 2007
ISBN:
9780195187168
eISBN:
9780199786725
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780195187168.003.0011
Subject:
Psychology, Clinical Psychology

This chapter offers a specific error-driven theory of lightness framed in terms of the rules of anchoring. The lightness model described in Gilchrist et al. (1999) is presented in more detail in this ... More


Concluding Thoughts

Alan Gilchrist

in Seeing Black and White

Published in print:
2006
Published Online:
September 2007
ISBN:
9780195187168
eISBN:
9780199786725
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780195187168.003.0013
Subject:
Psychology, Clinical Psychology

This chapter draws conclusions from the current evidence regarding lightness perception. It is argued that the twin assumptions of raw sensations and their cognitive interpretation have undermined ... More


Introduction

Alan Gilchrist

in Seeing Black and White

Published in print:
2006
Published Online:
September 2007
ISBN:
9780195187168
eISBN:
9780199786725
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780195187168.003.0001
Subject:
Psychology, Clinical Psychology

Color perception requires a distinction between both chromatic colors and achromatic colors. These are funny terms: the first is redundant, the second is an oxymoron — colored colors and non-colored ... More


The Contrast Period

Alan Gilchrist

in Seeing Black and White

Published in print:
2006
Published Online:
September 2007
ISBN:
9780195187168
eISBN:
9780199786725
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780195187168.003.0005
Subject:
Psychology, Clinical Psychology

Chronologically the fourth period of lightness theory, also known as the contrast period, extended from World War II until the end of the 1960s. Ideologically, however, it began at the end of the ... More


Computational Models

Alan Gilchrist

in Seeing Black and White

Published in print:
2006
Published Online:
September 2007
ISBN:
9780195187168
eISBN:
9780199786725
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780195187168.003.0007
Subject:
Psychology, Clinical Psychology

The computer revolution produced two quite different streams of work on lightness perception. These streams are represented by decomposition models and brightness models, respectively. Perhaps the ... More


Surface Completion: Psychophysical and Neurophysiological Studies of Brightness

Andrew F. Rossi and Michael A. Paradiso

in Filling-In: From Perceptual Completion to Cortical Reorganization

Published in print:
2003
Published Online:
May 2009
ISBN:
9780195140132
eISBN:
9780199865307
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780195140132.003.0004
Subject:
Neuroscience, Sensory and Motor Systems, Behavioral Neuroscience

This chapter presents data from psychophysical and physiological experiments that explored brightness perception and the possible involvement of filling-in. It begins with a discussion of ... More


Searching for the Neural Mechanism of Color Filling-In

Rüdiger von der Heydt, Howard S. Friedman, and Hong Zhou

in Filling-In: From Perceptual Completion to Cortical Reorganization

Published in print:
2003
Published Online:
May 2009
ISBN:
9780195140132
eISBN:
9780199865307
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780195140132.003.0006
Subject:
Neuroscience, Sensory and Motor Systems, Behavioral Neuroscience

This chapter discusses a perceptual phenomenon in which visual stimuli seem to assume the color and brightness of the surrounding region and thereby vanish from perception. It begins by reviewing the ... More


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