Dynamics of 1:2 Coordination: Temporal Scaling,Latent 1:1, and Bistability |
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Authors: | Dagmar Sternad M T Turvey Elliot L Saltzman |
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Institution: | 1. Pennsylvania State University;2. Center for the Ecological Study of Perception and Action , University of Connecticut and Haskins Laboratories;3. Boston University and Haskins Laboratories |
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Abstract: | The simplest interlimb multifrequency coordination of 1:2 can be performed at different speeds and in at least two different styles or modes. The effects of speed and mode (in-phase or antiphase) were evaluated in a bimanual 1:2 rhythmic task in which participants (N = 8) oscillated hand-held pendulums with identical or different uncoupled frequencies. A motion equation in relative phase that captures the asymmetries of components and task predicted the 1:2 coordination equilibria resulting from temporal scaling. According to the experimental results, both coordination modes proved to be equally stable. More detailed analyses of individual trials showed signs that the more fundamental 1:1 coordination intruded into the 1:2 coordination. |
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Keywords: | bimanual coordination coupled oscillators multifrequency coordination |
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