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Related Experiment Videos

Contingent aftereffects: lateral interactions between color and motion.

L T Sharpe1, J P Harris, C C Fach

  • 1Neurologische Universitätsklinik, Freiburg in Breisgau, Germany.

Perception & Psychophysics
|May 1, 1991
PubMed
Summary

Motion aftereffects can be linked to color, even when motion and color are initially separate. These visual effects extend beyond the directly stimulated area, challenging existing theories of visual processing.

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Area of Science:

  • Visual Perception
  • Neuroscience
  • Psychophysics

Background:

  • Contingent aftereffects demonstrate links between visual features.
  • Previous research suggested limited scope for these effects.

Purpose of the Study:

  • To investigate the spatial extent and generalization of motion-color contingent aftereffects.
  • To challenge existing models of visual processing and feature segregation.

Main Methods:

  • Adaptation to a rotating disk with alternating surround colors.
  • Paired changes in disk motion and surround color.
  • Testing for aftereffects on stationary and intervening stimuli.

Main Results:

  • Vivid motion aftereffects were reported, contingent on both disk and surround colors.

Related Experiment Videos

  • Lateral effects were observed, extending to areas not directly stimulated.
  • Aftereffects generalized to an annulus between disk and surround.

    • Conclusions:

    • Contingent aftereffects are not confined to the directly adapted retinal area.
    • Findings challenge theories of localized adaptation and early visual segregation of motion and color.