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Dissociating Higher and Lower Order Visual Motion Systems by Priming Illusory Apparent Motion.

Nathan H Heller1, Nicolas Davidenko1

  • 1University of California, Santa Cruz, USA.

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Summary

Motion priming influences perception, differentiating higher and lower order visual systems. Cognitive factors uniquely affect higher-order motion processing, impacting apparent motion perception.

Keywords:
apparent motionattentionhigher order motionlower order motionmotion aftereffectsmultistable stimuliprimingtop-down effects

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Area of Science:

  • Cognitive Neuroscience
  • Visual Perception
  • Computational Neuroscience

Background:

  • Motion processing involves hierarchical systems with distinct higher and lower-order components.
  • Motion priming paradigms dissociate these systems, yielding negative priming (lower-order) and positive priming (higher-order).
  • Previous research utilized bistable stimuli allowing only two motion interpretations.

Purpose of the Study:

  • To investigate motion priming using maximally ambiguous stimuli with more than two potential motion interpretations.
  • To determine if priming can induce coherent motion percepts from unstructured visual input.
  • To examine the influence of cognitive factors on higher-order motion processing.

Main Methods:

  • Employed maximally ambiguous test stimuli with randomly refreshing pixels.
  • Utilized a task allowing observers to report multiple motion percepts.
  • Manipulated stimulus parameters and response options to probe motion processing systems.

Main Results:

  • Motion priming successfully constrained random pixel patterns into coherent positive or negative apparent motion.
  • The higher-order motion processing system demonstrated susceptibility to cognitive influences.
  • Alternative response options significantly suppressed positive priming in the higher-order system.

Conclusions:

  • Motion priming effectively organizes ambiguous visual input into perceived motion, reflecting hierarchical processing.
  • Higher-order motion perception is uniquely modulated by cognitive factors and response strategies.
  • Findings advance our understanding of the interplay between low-level stimulus properties and high-level cognitive control in visual perception.