FACTORS INFLUENCING THE APPARENT VELOCITY OF VISUAL MOVEMENT AFTER-EFFECTS

D ureman , I. Factors influencing the apparent velocity of visual movement after-effects. Scand. J. Psychol ., 1962, 3 , 132–136.—Estimates of speed of apparent visual movement after-effects (VMAE) were undertaken with induction speed varied in five logarithmic steps from 9° to 144° per second. Two alternative test intervals 0.5 and 1.0 sec were used for intermittent inspection of a stationary target. At both inspection intervals VMAE-velocity estimates were found to vary in a systematic way with induction speed. Comparing values from the two test intervals, the 0.5 sec interval was found to yield significantly higher speed of VMAE than the 1.0 sec interval.