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Related Experiment Videos

Rapid recalibration based on optic flow in visually guided action.

Brett R Fajen1

  • 1Department of Cognitive Science, Rensselaer Polytechnic Institute, Carnegie Building 308, 110 8th Street, Troy, NY 12180-3590, USA. fajenb@rpi.edu

Experimental Brain Research
|July 20, 2007
PubMed
Summary
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Perceptual-motor calibration allows individuals to adapt to changing action capabilities, like braking. Studies show rapid recalibration occurs even without awareness of changes or visual feedback on task outcomes.

Area of Science:

  • Motor Control
  • Human Perception
  • Cognitive Psychology

Background:

  • Human action is constrained by physical limits, necessitating continuous adaptation.
  • Perceptual-motor calibration is crucial for adjusting to dynamic action capabilities.
  • Understanding calibration informs theories of visually guided movement.

Purpose of the Study:

  • To investigate the nature of perceptual-motor calibration in response to altered action capabilities.
  • To determine if recalibration occurs without conscious awareness of changes.
  • To examine the role of sensory feedback in the calibration process.

Main Methods:

  • Subjects performed a simulated braking task with altered brake dynamics.
  • Brake strength was unexpectedly modified mid-task.

Related Experiment Videos

  • Behavioral data were analyzed for evidence of recalibration before and after the change.

    • Main Results:

    • Actors rapidly recalibrated their braking behavior following unexpected changes in brake dynamics.
    • Recalibration persisted even when visual feedback on final position was absent.
    • Sensory consequences of the initial action adjustment were sufficient for recalibration.

    Conclusions:

    • Perceptual-motor calibration is a rapid and adaptable process essential for continuous action.
    • Calibration can occur even without explicit awareness or outcome feedback.
    • Sensory information from movement execution is vital for recalibrating action capabilities.