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Psychological Research

, Volume 45, Issue 1, pp 11–18 | Cite as

Short- and long-range processes in visual apparent movement

  • Axel Larsen
  • Joyce E. Farrell
  • Claus Bundesen
Article

Summary

The minimum stimulus-onset asynchrony required for perception of beta apparent movement was measured with point stimuli separated by visual angles ranging from about 0.1· to 5· and viewing distance as a parameter. For each viewing distance, the threshold for beta movement was a monotonic function of the visual angle with a strong linear increase over angles less than 0.25· (short-range function) and a much weaker linear increase over angles greater than 1.5· (long-range). The short- and long-range functions were differentially affected by increase in viewing distance: the long-range function increased in slope, but the extrapolated zero-intercept was constant; the short-range function changed in intercept, but not in slope. The results provide strong evidence for separate short- and long-range processes in visual motion perception.

Keywords

Strong Evidence Visual Angle Linear Increase Monotonic Function Apparent Movement 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1983

Authors and Affiliations

  • Axel Larsen
    • 1
  • Joyce E. Farrell
    • 2
  • Claus Bundesen
    • 3
  1. 1.Institute of Clinical PsychologyCopenhagen UniversityCopenhagen S.Denmark
  2. 2.Department of PsychologyNew York UniversityNew YorkUSA
  3. 3.Psychological LaboratoryCopenhagen UniversityCopenhagenDenmark

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