Reversed apparent motion with random dot patterns

Vision Res. 1989;29(12):1749-58. doi: 10.1016/0042-6989(89)90157-0.

Abstract

When luminance contrast of target in Braddick-type random dot cinematograms (RDC) is reversed, apparent motion in a direction opposite to the physical displacement is observed. The displacement limit of direction discrimination for this contrast-reversed RDC was found to have three characteristics: (1) the limit resembles that for regular RDC; (2) it is sensitive to target area; and (3) it is limited by the visual angle rather than by number of dots. This indicates that the same short-range process underlies both normal and reversed motion. However, it was found that performance declines remarkably in figural segregation for reversed motion, which suggests that the so called short-range process should be treated as having two distinct components.

MeSH terms

  • Form Perception / physiology*
  • Humans
  • Motion Perception / physiology*
  • Pattern Recognition, Visual / physiology*
  • Visual Perception / physiology*