Individual goals interact with dyad goals to constrain and facilitate the formation of interpersonal patterns of coordination.
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abstract
Two experiments were undertaken to examine the spontaneous and intentional formation of interpersonal coordination patterns within dyads. In both experiments, each individual in a dyad was given a pre-set amplitude goal of tracing a 3cm or 15cm line to maintain over a trial. Smaller amplitudes were associated with faster movement frequencies compared to larger amplitudes in both experiments. All trials started with the partners in the dyads not seeing each other, and at the half-way point within a trial vision of the partner was provided. In experiment 1, each individual was told to watch their partners hand in the view segment, yet maintain the amplitude goal. The pre-set amplitude goals limited the emergence of spontaneous interpersonal coordination in the form of frequency-locking and phase-entrainment. In experiment 2, the individuals in the dyad were told to intentionally coordinate at either a defined in-phase or anti-phase pattern of coordination when entering the view segment of a trial. All dyads formed the required coordination patterns at a 1:1 frequency-locking across 90% of trials when entering the view segment. However, the pre-set amplitudes still influenced performance of individuals in terms of movement amplitude and frequency modulations when intentionally forming the required coordination patterns. The proposed hypotheses and the interpretation of the results are framed within the coordination dynamics theory of perception-action processes.
