Difference-Limens for Photic Intermittence *

Abstract

Difference-limens for visual intermittence were measured in the range of one to 45 cps. The standard deviations obtained varied from 0.02 to 0.41 cps. and the relative difference-limens, $\frac{Δ f}{f}$ , computed from the average deviations, were from 0.005 to 0.024.

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