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Sensorimotor adaptation savings are reduced by interference from washout periods. Eliminating feedback during washout prevents this attenuation, suggesting memory interference impacts relearning.

Keywords:
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Area of Science:

  • Neuroscience
  • Motor Control
  • Cognitive Psychology

Background:

  • Savings, or improved performance upon relearning, is a key aspect of sensorimotor adaptation.
  • Implicit adaptation, crucial for recalibrating the sensorimotor map, shows reduced contribution upon relearning.
  • Previous research indicates savings are attenuated after washout periods with salient, opposing errors.

Purpose of the Study:

  • To test the hypothesis that attenuated implicit adaptation upon relearning is caused by interference from the washout period.
  • To investigate the role of error salience and feedback during washout in memory interference.
  • To explore the sensitivity of the implicit sensorimotor adaptation system to discrepant action-outcome contingencies.

Main Methods:

  • Replicated findings of attenuated implicit adaptation after washout with salient opposite errors.
  • Manipulated feedback presence during washout to assess its effect on relearning.
  • Introduced washout periods with non-salient errors and extended veridical feedback exposure.

Main Results:

  • Eliminating feedback during washout abolished the attenuation of relearning, supporting the interference hypothesis.
  • Attenuation of adaptation persisted even when washout errors were non-salient.
  • Extended initial exposure to veridical feedback attenuated subsequent adaptation in a context-specific manner.

Conclusions:

  • The implicit sensorimotor adaptation system is highly susceptible to memory interference.
  • Discrepant action-outcome contingencies experienced during washout significantly impact subsequent learning.
  • Interference, rather than just salient errors, plays a critical role in the observed attenuation of savings.