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Related Experiment Videos

Calibrating reach distance to visual targets.

Mark Mon-Williams1, Geoffrey P Bingham

  • 1School of Psychology, University of Aberdeen, Aberdeen, Scotland, UK.

Journal of Experimental Psychology. Human Perception and Performance
|June 15, 2007
PubMed
Summary
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This study reveals how the brain calibrates reach distance by adjusting to distorted haptic feedback. Reach space exhibits asymmetry, recalibrating bias and slope independently and robustly.

Area of Science:

  • Neuroscience
  • Motor Control
  • Human Perception

Background:

  • Motor adaptation is crucial for adjusting movements to altered sensory feedback.
  • Understanding the parameters governing reach calibration provides insight into sensorimotor control.

Purpose of the Study:

  • To investigate the calibration of reach distance under distorted haptic feedback.
  • To determine if calibration generalizes across different reach spaces and parameters.
  • To explore the symmetry and stability of reach space recalibration.

Main Methods:

  • Participants reached for visible targets with gradually distorted haptic feedback.
  • Analysis involved modeling the reach distance-visual distance relationship using bias and slope parameters.
  • Experiments systematically altered feedback to assess recalibration dynamics and generalization.

Related Experiment Videos

Main Results:

  • The relationship between visual and reach distance is a linear function characterized by bias and slope.
  • Both bias and slope parameters recalibrate, demonstrating adaptive motor control.
  • Reach space is asymmetric, with inward bias shifts occurring more readily than outward shifts.
  • Calibration of bias and slope can occur independently and is not cognitively penetrable.

Conclusions:

  • The human motor system effectively calibrates reach distance based on distorted haptic feedback.
  • Reach space exhibits inherent asymmetries in recalibration.
  • Motor calibration processes are robust, rapid, and independent of conscious cognitive control.