The effects of axis and rate of rotation on discrimination of cube and pyramid stimuli from Cook & Katz (1999). The red line indicates performance with Y-axis rotations of these stimuli. There was little effect of motion for this rotation, presumably because it added little new information to these unambiguous views of the stimuli. The green and blue lines show the effects of more complex motions that resulted in larger  distortions in the appearance of the objects. In both of these two cases, there was a dynamic superiority effect for all three rates of rotation tested.