The Role of Attention in Motor Control

Research on the focus of attention (FOA) in motor control has found a consistent advantage for focusing externally (on the effects of one's actions) compared to focusing internally (on one's body mechanics). However, most of this work has concentrated on movement outcomes, leaving open the...

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Bibliographic Details
Published in:Journal of experimental psychology. General 2014-04, Vol.143 (2), p.930-948
Main Authors: Lohse, Keith R., Jones, Matt, Healy, Alice F., Sherwood, David E.
Format: Article
Language:English
Subjects:
Activity levels. Psychomotricity
Attention
Biological and medical sciences
Biomechanical Phenomena
Cognition & reasoning
Cognitive Processes
Correlation analysis
Experimental psychology
Female
Fundamental and applied biological sciences. Psychology
Human
Humans
Kinematics
Male
Motor ability
Motor Control
Motor Performance
Motor Processes
Movement
Psychology. Psychoanalysis. Psychiatry
Psychology. Psychophysiology
Psychomotor activities
Psychomotor Performance
Vigilance. Attention. Sleep
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Summary:Research on the focus of attention (FOA) in motor control has found a consistent advantage for focusing externally (on the effects of one's actions) compared to focusing internally (on one's body mechanics). However, most of this work has concentrated on movement outcomes, leaving open the question of how external attention changes the movement itself. Somewhat paradoxically, recent research has found that external attention also increases trial-by-trial movement variability. To explain these findings, we propose a theory of attention in motor control, grounded in optimal control theory, wherein variability is minimized along attended aspects of the movement. Internal attention thus reduces variability in individual bodily dimensions (positions and velocities of effectors), whereas external attention minimizes variability in the task outcome. Because the goal of a task defines a dimension in the movement space that is generally oblique to bodily dimensions, external attention should increase correlations among bodily dimensions while allowing their individual variances to grow. The current experiment tests these predictions in a dart-throwing task. External FOA led to more accurate performance and increased variability in the motion of the throwing arm, concomitant with stronger correlations among bodily dimensions (shoulder, elbow, and wrist positions and velocities) in a manner consistent with the task kinematics. These findings indicate a shift in the control policy of the motor system, consistent with the proposed theory. These results suggest an important role of attention as a control parameter in the regulation of the motor system, and more broadly illustrate the importance of cognitive mechanisms in motor behavior.
ISSN:0096-3445
1939-2222
DOI:10.1037/a0032817