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Published on: April 11, 2025
Visual capture influences body-based indications of visual extent
Benjamin R Kunz1, Sarah H Creem-Regehr, William B Thompson
1Department of Psychology, University of Utah, Salt Lake City, UT 84112, USA. benjamin.kunz@psych.utah.edu
Experimental Brain Research
|October 28, 2010
Summary
Visual capture, where sight overrides touch, affects how we perceive object size. This study shows visual illusions influence our sense of space and action, impacting judgments beyond simple limb positioning.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Human Perception
Background:
- Proprioception, the sense of body position, can be overridden by visual information, a phenomenon known as visual capture.
- The mirror illusion demonstrates how visual feedback from a reflection can alter perceived limb location.
Purpose of the Study:
- To investigate if visual capture influences the perception of object extent.
- To determine if visual illusions affect body-based spatial judgments beyond egocentric localization.
Main Methods:
- Utilized the mirror illusion with participants viewing their hand and its reflection.
- Participants performed actions to grasp objects after experiencing visual-proprioceptive conflict.
- Assessed hand movements and spatial judgments under conditions of visual-proprioceptive conflict.
Main Results:
- Visual capture biased movements and spatial judgments, indicating errors in perceived hand position.
- Visual capture influenced the perception of object extent for objects within reach and aligned with the midline.
- These effects extended to objects outside reach and those misaligned with the midline.
Conclusions:
- Visual information significantly impacts body-based actions and space perception.
- The influence of visual capture on spatial judgments is generalizable across different object locations and reachability.
- Findings suggest a broad role for visual body information in shaping our interaction with the environment.
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