PERCEIVED BRIGHTNESS OF LIGHT FLASHES.
NAVAL TRAINING DEVICE CENTER PORT WASHINGTON N Y
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A psychophysical investigation of some aspects of the Broca-Sulzer effect was conducted by means of an optical system designed to provide contiguous uniocular or separate binocular brightness comparisons of brief flashes superimposed on a constant luminance adapting field. The data lend support to the conclusion that flash duration giving the greatest brightness is long at low luminance, becomes progressively briefer as luminance increases, but then grows longer again as luminance increases to very high levels, following the change in amount of effect, which increases to a maximum, and then decreases as luminance increases. Author