Space-time accuracy of rapid movements
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Updated: Sep 26, 2026

Movement Retraining using Real-time Feedback of Performance
Published on: January 17, 2013
K M Newell1, L G Carlton, S Kim
1Department of Kinesiology, University of Illinois at Urbana-Champaign, USA. kmn@psu.edu
Abstract:
The space-time accuracy of an elbow flexion movement task was examined in two experiments over a range of motion extents (1 degrees through 100 degrees ) and short-duration movement times (100, 125, 150, and 400 ms). Nonlinear speed-accuracy functions emerged for both spatial and temporal error over all the movement conditions examined. The results showed that the timing error and spatial error had a high degree of complementarity as predicted by a space-time model of the speed-accuracy relation (Hancock & Newell, 1985). The findings confirm that the frame of reference for measuring movement error determines in part the error functions observed.
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