PERCEPTION OF BIOLOGICAL MOTION

Boundary conditions for perception of biological motion were explored with the use of computer-generated point-light animation sequences. Pe rception of this unique form of structure from motion is immune to var iations in dot contrast polarity, dot disparity, and spatial-frequency filtering. Biological motion is perceived in texture-defined animatio n sequences that presumably stimulate only second-order motion pathway s, and it is undisturbed by dichoptic presentation of portions of the animation tokens separately to the two eyes.