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Apparent motion and element connectedness.

M R Dawson1

  • 1Centre For Advanced Study In Theoretical Psychology, University of Alberta, Edmonton, Canada.

Spatial Vision
|January 1, 1989
PubMed
Summary
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Connectedness does not influence the likelihood of perceiving apparent motion. However, identical connected figures enhance the visibility of apparent motion compared to dissimilar ones.

Area of Science:

  • Cognitive Psychology
  • Visual Perception
  • Computational Neuroscience

Background:

  • The perception of apparent motion is fundamental to visual processing.
  • Topological properties, such as connectedness, may influence visual perception.
  • Previous research (Chen, 1985) suggested a role for connectedness in apparent motion.

Purpose of the Study:

  • To investigate the effect of topological connectedness on apparent motion perception.
  • To determine if connectedness influences the likelihood or visibility of apparent motion.

Main Methods:

  • Experiment I: Measured points of subjective equality (PSEs) in a motion competition paradigm to assess the likelihood of apparent motion.
  • Experiment II: Measured displacement PSEs for motion visibility.

Related Experiment Videos

  • Utilized stimuli varying in topological connectedness.

    • Main Results:

    • Experiment I found no increased likelihood of apparent motion between topologically identical elements compared to dissimilar ones.
    • Experiment II revealed significantly greater visibility of apparent motion between identical figures than between figures differing in connectedness.
    • Results challenge previous findings regarding the role of connectedness in motion detection.

    Conclusions:

    • Connectedness does not appear to affect the probability of perceiving apparent motion.
    • Connectedness significantly enhances the visibility of apparent motion.
    • Findings support a two-stage model of the long-range motion system.