Task goals and change in dynamical degrees of freedom with motor learning.

Full Abstract

In this article, the authors examined the hypothesis that the direction of the change (increase or decrease) in the dynamical degrees of freedom (dimension) regulated as a function of motor learning is task-dependent. Adult participants learned 1 of 2 isometric force-production tasks (Experiment

1:
constant force output; Experiment

2:
sinusoidal force output) over 5 days of practice and a 6th day with augmented information withdrawal. The results showed that over practice, the task goal induced either an increase (Experiment 1) or a decrease (Experiment 2) in the dimension of force output as performance error was reduced. These findings support the proposition that the observed increase or decrease in dimension with learning is dependent on both the intrinsic dynamics of the system and the short-term change required to realize the task goal.

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Author information

Author/s: Newell, Karl M (KM); Broderick, Michael P (MP); Deutsch, Katherine M (KM); Slifkin, Andrew B (AB);

Affiliation: Department of Kinesiology, College of Health and Human Development, Pennsylvania State University, University Park 16802, USA. kmn1(-atsign-)psu.edu

Journal and publication information

Publication Type: Clinical Trial; Journal Article

Journal: Journal of experimental psychology. Human perception and performance (J Exp Psychol Hum Percept Perform), published in United States. (Language: eng)

Reference: 2003-Apr; vol 29 (issue 2) : pp 379-87

Dates: Created 2003/05/22; Completed 2003/09/09; Revised 2004/11/17;

PMID: 12760622, status: MEDLINE (last retrieval date: 12/26/2008)

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MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Adaptation, Physiological
Adaptation, Psychological
Adult
Goals
Humans
Isometric Contraction - physiology
Kinesthesis - physiology
Learning - physiology

Learning - physiology
Middle Aged
Motor Skills - physiology
Practice (Psychology)
Problem Solving - physiology
Psychomotor Performance - physiology
Psychophysics
Psychophysiology

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