Direct scaling of short time intervals presented with moving and stationary visual stimuli.

The subjective duration of moving and stationary stimuli was compared by the method of magnitude estimation. The psychophysical functions for both types of stimuli differ in shape. The psychophysical function in the case of stationary stimuli is linear as it has been shown in earlier investigations. The psychophysical function in the case of moving stimuli is not linear because for certain velocities there appear inversions in it. Above a certain velocity the duration of moving stimuli is perceived as longer than that of the stationary ones.