Category Judgments as Functions of Flash Luminance and Duration
- 1 December 1965
- journal article
- Published by Optica Publishing Group in Journal of the Optical Society of America
- Vol. 55 (12) , 1655-1660
- https://doi.org/10.1364/josa.55.001655
Abstract
A method for obtaining suprathreshold, constant-response functions from category judgments was developed and illustrated by obtaining judgments for flashes of varying luminance and duration in the fovea. The contours show agreement with Bloch’s law; no Broca—Sulzer effect was obtained. A second experiment indicated that the method is sensitive to context effects. No reliable variation in the critical duration was found with changes in luminance level.Keywords
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