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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

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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.

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.