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An Experimental Platform to Study the Closed-loop Performance of Brain-machine Interfaces

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Further tests of adams' closed-loop theory.

R A Schmidt¹, C A Wrisberg

¹a Department of Physical Education , The University of Michigan.

Journal of Motor Behavior

|August 22, 2013

Summary

Adams

Area of Science:

Motor learning research
Human motor control studies

Background:

Adams' closed-loop theory of motor learning proposes memory and perceptual traces for response production and evaluation.
Understanding the mechanisms of motor skill acquisition is crucial for rehabilitation and performance enhancement.

Purpose of the Study:

To empirically test the validity of Adams' closed-loop theory in a ballistic manual response task.
To investigate the influence of knowledge of results (KR) and feedback on motor learning and error detection.

Main Methods:

Two experiments involving participants performing a 26-inch ballistic manual response within 200 msec.
A 2x2 factorial design manipulating the presence/absence of visual/auditory feedback and the withdrawal of KR during trials 20-45.

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Main Results:

Withdrawal of knowledge of results (KR) significantly impaired performance.
Performance decrements were more pronounced under limited feedback conditions.
Error detection capabilities improved over trials, independent of visual and auditory feedback.

Conclusions:

The study provides partial support for Adams' closed-loop theory of motor learning.
The findings highlight the importance of KR for motor performance but suggest error detection may operate independently of continuous feedback.