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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

(p.738) (p.739) 37 Some Temporal Factors in Vision
Sensory Communication

Boynton Robert M.

The MIT Press

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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