People who have taken psychedelic drugs, such as lysergic acid diethylamide (LSD) or mescaline, often report that the objects and people that they see appear to be changing in size, shape, and...

People who have taken psychedelic drugs, such as lysergic acid diethylamide
(LSD) or mescaline, often report that the objects and people that they see appear to be changing in size, shape, and brightness. This suggests that such drugs disrupt which perceptual process?