Reversed apparent motion with random dot patterns.
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.
Sato
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ATR Auditory and Visual Perception Research Laboratories, International Advanced Telecommunications Research Institute, Kyoto, Japan.
D005556:Form Perception / Q000502:physiology*; D006801:Humans; D009039:Motion Perception / Q000502:physiology*; D010364:Pattern Recognition, Visual / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology*