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Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior
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Vision shapes tactile spatial perspective taking.

Xavier Job1, Gabriel Arnold1, Louise P Kirsch1

  • 1Institut des Systèmes Intelligents et de Robotique (ISIR, CNRS UMR 7222), Sorbonne Université.

Journal of Experimental Psychology. General
|February 1, 2021
PubMed
Summary
This summary is machine-generated.

Vision loss, whether temporary or permanent, promotes an egocentric spatial perspective. Early visual experience is crucial for flexible perspective-taking in the tactile domain, influencing how we process spatial information.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Sensory Processing

Background:

  • Environmental information can be perceived from ego-centered or decentered spatial perspectives.
  • Vision may dominate spatial information processing, potentially impacting perspective-taking in other senses.
  • Visual loss may alter spatial perspective adoption and flexibility in non-visual domains.

Purpose of the Study:

  • To investigate how vision influences naturally adopted spatial perspectives in the tactile domain.
  • To examine the impact of visual experience on the ability to switch between tactile spatial perspectives.
  • To understand the role of vision in shaping both spontaneous and flexible spatial perspective-taking.

Main Methods:

  • Tactile recognition task using ambiguous letters ('b,' 'd,' 'p,' 'q') presented on the body.
  • Inclusion of participants with varying visual experience: early blind, late blind, blindfolded-sighted, and sighted.
  • Assessment of perspective adoption (trunk-centered, head-centered, decentered) under free and imposed conditions.

Main Results:

  • Temporary and permanent vision loss promoted spontaneous adoption of ego-centered, head-anchored coordinates.
  • Blind individuals adopted fewer decentered perspectives compared to blindfolded-sighted individuals.
  • Early blind participants showed a greater cost when switching tactile perspectives compared to sighted individuals.

Conclusions:

  • Vision significantly shapes the naturally adopted spatial perspective in sensory processing.
  • Blindness, particularly early visual experience, is critical for maintaining flexible tactile perspective-taking.
  • Visual experience influences both the default spatial frame of reference and the adaptability of perspective shifting.