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Related Experiment Video

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Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior
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Action Experience Drives Visual-Processing Biases Near the Hands.

Laura E Thomas1

  • 1Center for Visual and Cognitive Neuroscience, Department of Psychology, North Dakota State University.

Psychological Science
|November 23, 2016
PubMed
Summary
This summary is machine-generated.

Visual processing near the hands changes with experience. Learning new grasps enhances visual sensitivity relevant to those specific actions, demonstrating plasticity in visual cognition.

Keywords:
action affordancesopen dataplasticityvisual processing

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Area of Science:

  • Cognitive Neuroscience
  • Human Perception
  • Motor Control

Background:

  • Visual processing is biased for objects within the hands' grasping space.
  • The underlying mechanisms for this action-facilitating visual tuning are not well understood.

Purpose of the Study:

  • To investigate if experience-driven plasticity alters vision near the hands.
  • To determine if learning novel grasp affordances tunes visual cognition.

Main Methods:

  • Participants performed visual tasks (motion detection, form perception) with hands in different positions (near display, atypical postures, lap).
  • Tasks were conducted before and after participants learned new grasp affordances.
  • Two experiments focused on different grasp types (power grasp, precision grasp).

Main Results:

  • Enhanced temporal sensitivity was observed for stimuli near the back of the hands after learning a power grasp.
  • Increased spatial sensitivity was found for stimuli near the little finger after learning a precision grasp.

Conclusions:

  • Visual biases near the hands are not fixed but are plastic and shaped by experience.
  • This visual plasticity facilitates the processing of information crucial for newly learned grasp affordances.