Coupling a motion aftereffect (MAE) produced by horizontal shearing mo
tion with a lateral head movement yields apparent depth. In experiment
s 1 and 2, respectively, the magnitude and the decay time of this appa
rent depth were measured. In experiment 3, it was found that the stimu
lus that produced an MAE in experiments 1 and 2 failed to do so when i
t was viewed while the head moved leftward and rightward and depth was
seen.