| Number | 718 |
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| Year | 1990 |
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| Drawer | 13 |
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| Entry Date | 11/15/1999 |
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| Authors | Schmidt, R. C., Carello, C., & Turvey, M. T. |
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| Contact | |
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| Publication | Journal of Experimental Psychology: Human Perception and Performance, 16(2), 227-247. |
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| Abstract | By watching each other's lower oscillating leg, 2 seated Ss kept a common tempo and a particular phase relation of either 0 (symmetric mode) or 180 (alternate mode). This study investigated the differential stability of the 2 phase modes. In Experiment1, in which subjects were instructed to remain in the initial phase mode, the alternate phase mode was found to be less stable as the
frequency of oscillation increased. In addition, analysis of the nonsteady state cycles revealed evidence of a switching to the symmetric phase mode for the initial alternate phase mode trials. In Experiments 2 and 3, Ss were instructed to remain at a noninitial phase angle if it was found to be more comfortable. The transition observed between the 2 phase modes satisfies the
criteria of a physical bifurcation (hysteresis, critical fluctuations, and divergence) and is consonant with previous findings on transitions in limb coordination within a person. |
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| Notes | |
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