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Surround-contingent motion aftereffect.

Yusuke Nakashima1, Takumi Iijima1, Yoichi Sugita1

  • 1Department of Psychology, Waseda University, 1-24-1 Toyama, Shinjuku-ku 162-8644, Tokyo, Japan.

Vision Research
|October 14, 2015
PubMed
Summary

Motion aftereffects (MAE) depend on surrounding context. Visual stimuli presented with specific frames created lasting MAE, even when presented in different locations, suggesting higher-level visual processing.

Keywords:
AdaptationContingent aftereffectMotion aftereffectReference frame

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Area of Science:

  • Neuroscience
  • Visual Perception
  • Cognitive Psychology

Background:

  • Motion aftereffects (MAE) are visual illusions where prolonged exposure to motion alters subsequent perception.
  • The influence of surrounding context on MAE is not fully understood.

Purpose of the Study:

  • To investigate if motion aftereffects (MAE) are contingent on surrounding visual elements.
  • To explore the spatial extent and duration of surround-contingent MAE.

Main Methods:

  • Alternating presentation of leftward and rightward moving random dots, each surrounded by a distinct frame (circle or square).
  • Assessment of MAE after prolonged exposure, testing stimuli at various retinotopic and spatiotopic positions.
  • Evaluation of MAE duration and spatial transfer.

Main Results:

  • MAE were found to be contingent on the surrounding frame.
  • The aftereffect persisted for up to 24 hours.
  • MAE showed significant transfer across different retinotopic and spatiotopic positions within the same visual hemi-field.

Conclusions:

  • Surroundings significantly influence motion aftereffects, extending beyond simple stimulus features.
  • Surround-contingent MAE suggest involvement of higher-level motion processing pathways in the visual system.
  • The findings have implications for understanding visual adaptation and context-dependent perception.