Abstract
Reaction times for a simple two-choice shape discrimination requiring either one or both visual cortices were measured.
In a total reaction time of around 400 millisec. the difference found was 3.0 ± 2.6 millisec. If subjects were weighted according to number of observations, and — 1.34 ± 1.68 millisec. if they were weighted according to reciprocals of variances of differences of means; that is, it was not significant.
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