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  • Title: A comparison of intra- and interpersonal interlimb coordination: coordination breakdowns and coupling strength.
    Author: Schmidt RC, Bienvenu M, Fitzpatrick PA, Amazeen PG.
    Journal: J Exp Psychol Hum Percept Perform; 1998 Jun; 24(3):884-900. PubMed ID: 9627423.
    Abstract:
    Intra- and interpersonal interlimb coordination of pendulums swung from the wrist was investigated. For both kinds of coordination, the steady state and breakdown of bimanual rhythmic coordination as indexed by the time series of the relative phase angle phi were studied under the manipulation of coordination mode, frequency of oscillation, and the difference in the eigenfrequencies (preferred tempos) of the individual oscillating limbs. The properties observed for both intra- and interpersonal coordination were those predicted by a dynamical model of rhythmic coordination that considers the coordinated limbs coupled to be nonlinear oscillators. Using a regression method, the coupling strengths of the coupled system were recovered. As predicted by the dynamical model, the strength of the dynamic was generally greater for the in-phase than the anti-phase mode and decreased with increasing frequency. Further, the strength of the interpersonal interlimb coupling was weaker than that of intrapersonal interlimb coupling.
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