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Using Practice Testing, Public Speaking, and Source Monitoring to Examine the Influences of Learning Strategies and Stress on Episodic Memory
Published on: June 14, 2019
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Practice induces a qualitative change in the memory representation for visuomotor learning.
David M Huberdeau1, John W Krakauer2,3, Adrian M Haith2
1Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland.
Journal of Neurophysiology
|August 8, 2019
Summary
Prior experience improves motor adaptation by enhancing deliberate compensation, not implicit recalibration. Practice caches explicit strategies, enabling faster, more automatic movement adjustments.
Area of Science:
- Motor learning
- Cognitive neuroscience
- Human movement science
Background:
- Motor adaptation relies on parallel processes: implicit recalibration (sensory-prediction errors) and deliberate compensation.
- Prior experience enhances adaptation speed (savings), but its effect on individual learning processes is unclear.
Purpose of the Study:
- Investigate how practice influences implicit recalibration and deliberate compensation in visuomotor adaptation.
- Clarify the mechanisms underlying savings in motor learning.
Main Methods:
- Participants adapted to a visuomotor rotation over 2 days of practice.
- Measured the contributions of implicit recalibration and deliberate compensation to adaptation and savings.
Main Results:
- Implicit recalibration rate did not improve with practice.
- Deliberate compensation was increasingly utilized, even with limited preparation time.
- Practice led to a qualitative shift in strategy, not just quantitative improvement.
Conclusions:
- Savings in visuomotor adaptation are driven by improved deliberate compensation, not implicit recalibration.
- Practice establishes cached associations, transitioning deliberate strategies towards automaticity.
- This reconciles findings on strategic compensation with implicit motor memory principles.
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