Effects of Prolonged Dark Adaptation on Autokinetic Movement

Abstract

To determine the effects of prolonged dark adaptation on autokinetic movement 2 groups of 10 Ss with equal numbers of men and women were subjected to 1 hr. or 5 min. of dark adaptation before tests on autokinetic judgments. Ss dark adapted for 1 hr. had shorter latency of onset of movement (p < .001) than Ss with 5 min. of dark adaptation. There was no significant difference between men and women.