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Measuring Sensitivity to Viewpoint Change with and without Stereoscopic Cues
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Updating perception and action across real-world viewpoint changes.

Andrew Clement1,2, James R Brockmole3

  • 1University of Notre Dame, Notre Dame, IN, 46556, USA. as.clement@utoronto.ca.

Attention, Perception & Psychophysics
|April 26, 2020
PubMed
Summary
This summary is machine-generated.

Action-specific visual distortions, like altered distance perception, disappear when observers change their viewpoint. Moving to a new location eliminates these perception changes, regardless of movement type.

Keywords:
ActionsEmbodied cognitionMovementSpatial updatingTool use

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Area of Science:

  • Cognitive psychology
  • Visual perception science

Background:

  • Performing actions can alter visual perception, affecting size and distance judgments.
  • These action-induced perceptual distortions are known to persist in memory.
  • It remains unclear if these distortions endure when an observer changes their spatial perspective.

Purpose of the Study:

  • To investigate whether action-specific perceptual distortions persist across changes in observer viewpoint.
  • To determine if movement to a new location eliminates previously observed visual distortions.

Main Methods:

  • Participants reached for a projected object using their finger or a tool.
  • Following the reach, participants either stayed put or moved to a new viewpoint.
  • Distance estimations were then made from the new or original viewpoint.

Main Results:

  • When stationary, using a tool to reach for an object resulted in shorter distance estimates.
  • When participants moved to a new viewpoint after reaching, these distance estimation distortions were eliminated.
  • The elimination of distortions occurred irrespective of the type of movement (rotation, translation, or walking in place).

Conclusions:

  • Action-specific perceptual distortions are not permanent and are dependent on the observer's current spatial context.
  • Movement and the associated change in viewpoint effectively reset or eliminate these visual perception biases.
  • The findings suggest that visual perception is dynamically updated based on egocentric spatial information and movement.