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Predictability is necessary for closed-loop visual feedback delay adaptation.

Marieke Rohde1, Loes C J van Dam, Marc O Ernst

  • 1Department of Cognitive Neuroscience, University of Bielefeld, Bielefeld, Germany.

Journal of Vision
|March 7, 2014
PubMed
Summary
This summary is machine-generated.

Humans can adapt to delayed visual feedback in visuomotor tasks, but only when the target motion is predictable. Predictability is key for recalibrating motor behavior and time perception, explaining differing study results.

Keywords:
feedback delaysmanual trackingpredictabilitytime perceptionvisuomotor adaptation

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Area of Science:

  • Human motor control
  • Perception and timing
  • Visuomotor adaptation

Background:

  • Humans can compensate for delayed visual feedback in visuomotor tasks.
  • Divergent findings exist regarding the permanence and nature of this adaptation, specifically concerning motor behavior and time perception recalibration.

Purpose of the Study:

  • To investigate whether the predictability of the reference signal is necessary for semipermanent delay adaptation in visuomotor tasks.
  • To explore the impact of reference signal predictability on motor behavior and perceived simultaneity.

Main Methods:

  • Participants performed a visually guided manual tracking task with a constant 200 ms visual feedback delay.
  • Reference signal predictability was manipulated across conditions.
  • Motor behavior (Experiment 1) and perceived simultaneity (Experiments 2 & 3) were assessed.

Main Results:

  • Adaptive motor changes and aftereffects were observed only when the reference signal was predictable.
  • Perceived visuomotor simultaneity was recalibrated solely in the predictable condition, confirmed by synchronization and interval estimation tasks.

Conclusions:

  • Predictability of the reference signal is essential for genuine, semipermanent delay adaptation in visuomotor tasks.
  • Adaptation involves co-adapting motor prediction with target prediction (reference extrapolation).
  • This finding reconciles conflicting results in the existing literature on visuomotor delay adaptation.