Abstract
Applying research findings on the perception of human movement it was predicted that enhancement of a model's limbs with points of light so as to convey particular postures clearly would significantly facilitate the fidelity of modeling a gymnastic action. Four 14-yr.-old boys judged to be equally skilled in the performance of a headspring vault practiced to improve their form (extension of knees) either in an enhanced or a normal video-modeling condition. The performance criterion was the average angle at the knee for sampled frames between the piked position in the initial phase of the vault and the fully extended body position at the start of the flight phase. Analysis yielded a significant main effect for practice but no differences among the experimental conditions.
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