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| Record Number | 1445 |
| Reference Type | Journal Article |
| Author(s) | Sternad, D.;Duarte, M.;Katsumata, H.;Schaal, S. |
| Year | 2001 |
| Title | Bouncing a ball: Tuning into dynamic stability |
| Journal/Conference/Book Title | Journal of Experimental Psychology: Human Perception and Performance |
| Keywords | dynamic systems approach, computational motor control, task dynamics, perception-action coupling, movement primitives |
Abstract |
Rhythmically bouncing a ball with a racket was investigated and modeled with a nonlinear map. Model analyses provided a variable defining a dynamically stable solution that obviates computationally expensive corrections. Three experiments evaluated whether dynamic stability is optimized and what perceptual support is necessary for stable behavior. Two hypotheses were tested: (a) Performance is stable if racket acceleration is negative at impact, and (b) variability is lowest at an impact acceleration between -4 and -1 m/s2. In Experiment 1 participants performed the task, eyes open or closed, bouncing a ball confined to a 1-dimensional trajectory. Experiment 2 eliminated constraints on racket and ball trajectory. Experiment 3 excluded visual or haptic information. Movements were performed with negative racket accelerations in the range of highest stability. Performance with eyes closed was more variable, leaving acceleration unaffected. With haptic information, performance was more stable than with visual information alone.
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| Notes | clmc |
| Volume | 27 |
| Number | 5 |
| Pages | 1163-1184 |
| Short Title | Bouncing a ball: Tuning into dynamic stability |
| Papers are available as Adobe PDF ".pdf" files. Adobe Reader is available for free for all computer platforms.
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Page last modified on August 10, 2006, at 06:47 PM
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