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How Is Body Orientation Controlled During Somersaulting?
How body orientation is controlled during somersaulting was investigated in 2 experiments that analyzed the kinematics of 223 backward standing somersaults. In Experiment 1, open-loop, initial-condition (flight duration), and prospective (time to contact, or TC 1 ) control strategies were tested as...
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Published in: | Journal of experimental psychology. Human perception and performance 1998-06, Vol.24 (3), p.963-977 |
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Main Authors: | , |
Format: | Article |
Language: | English |
Subjects: | |
Online Access: | Get full text |
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Summary: | How body orientation is controlled during somersaulting was investigated in 2 experiments
that analyzed the kinematics of 223 backward standing somersaults. In Experiment 1, open-loop,
initial-condition (flight duration), and prospective (time to contact, or
TC
1
) control strategies were tested as candidates
for the regulation of body moment of inertia during the jump. Decreasing between-trials
variability of body orientation over time as well as a negative correlation between body
angular velocity and
TC
1
suggested that the moment of inertia was
regulated prospectively. In Experiment 2, the visual basis for this regulation was examined by
asking experts and novices to execute somersaults either with eyes closed or open. Results
showed that the prospective regulation observed in the vision condition disappeared in the
no-vision condition with the experts, arguing in favor of a visual control during the jump.
Such a coupling was absent with the novices, thus illustrating the role played by the
perception-action cycle in the learning process. |
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ISSN: | 0096-1523 1939-1277 |
DOI: | 10.1037/0096-1523.24.3.963 |