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Feedback-Induced Variability and the Learning of Generalized Motor Programs.

G. Wulf1, R. A. Schmidt

  • 1Max-Planck-Institut fü;r psychologische Forschung, Leopoldstrasse 24, 80802 Mü;nchen, Germany.

Journal of Motor Behavior
|December 1, 1994
PubMed
Summary

Reducing feedback frequency improves long-term motor learning retention. However, providing feedback reminders during practice can hinder learning, especially in random practice sequences, by increasing response variability.

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Area of Science:

  • Motor Learning
  • Cognitive Psychology
  • Human Movement Science

Background:

  • Extrinsic feedback frequency significantly impacts motor skill acquisition and long-term retention.
  • Frequent feedback may proactively influence subsequent trials, potentially increasing response variability and degrading learning.
  • The interplay between feedback schedules, practice variability, and learning outcomes requires further investigation.

Purpose of the Study:

  • To investigate the effect of feedback reminders on motor learning and retention.
  • To examine how feedback reminders interact with blocked versus random practice schedules.
  • To explore the underlying mechanisms, including response variability and retrieval operations, influencing learning.

Main Methods:

  • Participants learned three limb-patterning tasks under different feedback conditions (with/without reminders).

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  • Practice sequences were manipulated as either blocked or randomized.
  • Response variability during practice and retention were measured to assess learning.

    • Main Results:

    • Feedback reminders increased response variability in both blocked and random practice.
    • Feedback reminders impaired learning in random practice but not in blocked practice during retention tests.
    • Random practice enhanced generalized motor program learning, while parameterization was less affected.

    Conclusions:

    • Feedback reminders can degrade motor learning, particularly within random practice, by potentially overfacilitating retrieval operations.
    • The learning benefits of random practice may be partly mediated by feedback effects on retrieval processes.
    • Understanding feedback timing and practice structure is crucial for optimizing motor skill acquisition.