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Sensory Communication$
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Walter A. Rosenblith

Print publication date: 2012

Print ISBN-13: 9780262518420

Published to MIT Press Scholarship Online: August 2013

DOI: 10.7551/mitpress/9780262518420.001.0001

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Some Temporal Factors in Vision

Some Temporal Factors in Vision

Chapter:
(p.738) (p.739) 37 Some Temporal Factors in Vision
Source:
Sensory Communication
Author(s):

Boynton Robert M.

Publisher:
The MIT Press
DOI:10.7551/mitpress/9780262518420.003.0037

This chapter presents three psychophysical experiments involving temporal relations in vision. The first shows that, even with improved experimental technique, high-intensity short flashes can indeed look brighter than longer flashes of the same intensity, thus indicating that the classical Broca-Sulzer effect is not an artifact. The second experiment was a study of the transitional fraction of a second between dark adaptation and the beginning of light adaptation, using the conditioning-stimulus-test-flash technique. The third experiment concerns the successful measurement of test-flash thresholds in the presence of a 30-cps flickering stimulus. Each of these experiments raises a number of questions regarding the neurophysiological organization, function, and interactions of the visual systems serving the two eyes. A common unifying principle is the idea of temporal quantization of the visual input by the higher visual nervous system.

Keywords:   psychophysical experiments, temporal relations, vision, high-intensity short flashes, Broca-Sulzer effect, dark adaptation, light adaptation, visual systems, temporal quantization

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