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Visuo-Proprioceptive Matching Errors Are Consistent with Biases in Distance Judgments.

Irene A Kuling1,2, Willem J de Bruijne1, Kimberley Burgering1

  • 1a Department of Human Movement Sciences , Vrije Universiteit Amsterdam , Amsterdam , The Netherlands .

Journal of Motor Behavior
|October 31, 2018
PubMed
Summary

People exhibit consistent, yet unique, errors when aligning their unseen finger with visual targets. These visuo-proprioceptive matching errors stem from sensory transformation biases, not movement execution issues.

Keywords:
perceptual judgmentsproprioceptionproprioceptive position sensesensory matching

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Area of Science:

  • Cognitive Neuroscience
  • Human Motor Control
  • Perception

Background:

  • Individuals exhibit systematic, idiosyncratic, and task-specific errors in visuo-proprioceptive matching.
  • Inconsistencies exist between matching errors when moving the finger to a target versus moving a target to the finger.

Purpose of the Study:

  • To investigate whether visuo-proprioceptive matching errors originate during movement execution or sensory processing.
  • To determine the source of task-specific inconsistencies in spatial localization.

Main Methods:

  • Compared errors in moving an unseen index finger to a visual target with spatial judgment biases.
  • Assessed biases in deciding which of two visual targets was closer to the index finger prior to movement.

Main Results:

  • Spatial judgment biases were consistent with observed visuo-proprioceptive matching errors.
  • Inconsistencies in matching errors were not attributable to systematic errors during movement execution.

Conclusions:

  • Visuo-proprioceptive matching errors are likely rooted in biases within sensory transformations, rather than motor execution.
  • Understanding these sensory biases is crucial for explaining spatial localization inaccuracies in human perception and action.