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The reference frame of the tilt aftereffect.

Tomas Knapen1, Martin Rolfs, Mark Wexler

  • 1CNRS Laboratoire Psychologie de la Perception, Université Paris Descartes, Paris, France. tknapen@gmail.com

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The visual system uses a retinotopic frame of reference for perceptual aftereffects, not world- or head-centric ones. This indicates orientation adaptation occurs at retinotopic visual processing levels.

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Area of Science:

  • Neuroscience
  • Visual Perception
  • Computational Neuroscience

Background:

  • Perceptual aftereffects are sensitive probes of visual processing.
  • Recent studies suggest the translational aftereffect (TAE) may remap with saccades to maintain world-aligned adaptation.
  • Understanding the spatial frame of reference for these aftereffects is crucial for visual stability research.

Purpose of the Study:

  • To investigate the spatial frame of reference for the translational aftereffect (TAE).
  • To determine whether retinotopic, world-centric, or head-centric frames are critical for TAE.
  • To clarify the role of remapping in visual stability and feature gain transfer.

Main Methods:

  • Independently manipulated retinal position, gaze orientation, and head orientation between adaptation and test phases.
  • Measured the translational aftereffect (TAE) under varying spatial reference frames.
  • Utilized psychophysical methods to quantify perceptual shifts.

Main Results:

  • The translational aftereffect (TAE) critically depends on the correspondence between adaptation and test locations in a retinotopic frame of reference.
  • World- and head-centric frames of reference were found to play an insignificant role in the TAE.
  • Adaptation to orientation was confirmed to occur at retinotopic levels of visual processing.

Conclusions:

  • The TAE is governed by a retinotopic frame of reference, not world- or head-centric ones.
  • Visual stability remapping processes do not appear to transfer feature gain information during eye or head movements.
  • Findings support the localization of orientation adaptation within retinotopic visual processing stages.