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Motor-output variability: A theory for the accuracy of rapid motor acts

Motor-output variability: A theory for the accuracy of rapid motor acts Theoretical accounts of the speed–accuracy trade-off in rapid movement have usually focused on within-movement error detection and correction and have consistently ignored the possibility that motor-output variability might be predictably related to movement amplitude and movement time. The present author proposes a theory of motor-output variability that accounts for the relationship among the movement amplitude, movement time, the mass to be moved, and the resulting movement error. Predictions are derived from physical principles; empirical evidence supporting the principles is presented for 3 movement paradigms––single-aiming responses, reciprocal movements, and rapid-timing tasks––and the theory and data are discussed in terms of past theoretical accounts and future research directions. (33 ref) http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Psychological Review American Psychological Association

Motor-output variability: A theory for the accuracy of rapid motor acts

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References (35)

Publisher
American Psychological Association
Copyright
Copyright © 1979 American Psychological Association
ISSN
0033-295x
eISSN
1939-1471
DOI
10.1037/0033-295X.86.5.415
Publisher site
See Article on Publisher Site

Abstract

Theoretical accounts of the speed–accuracy trade-off in rapid movement have usually focused on within-movement error detection and correction and have consistently ignored the possibility that motor-output variability might be predictably related to movement amplitude and movement time. The present author proposes a theory of motor-output variability that accounts for the relationship among the movement amplitude, movement time, the mass to be moved, and the resulting movement error. Predictions are derived from physical principles; empirical evidence supporting the principles is presented for 3 movement paradigms––single-aiming responses, reciprocal movements, and rapid-timing tasks––and the theory and data are discussed in terms of past theoretical accounts and future research directions. (33 ref)

Journal

Psychological ReviewAmerican Psychological Association

Published: Sep 1, 1979

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