Accessing interpersonal and intrapersonal coordination dynamics.
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abstract
Both intrapersonal and interpersonal coordination dynamics have traditionally been investigated using relative phase patterns of in-phase (=0) and/or anti-phase (=180). Numerous investigations have demonstrated that coordination tasks that require other relative phase patterns (e.g., 90) are difficult or near impossible to perform without extended practice. Recent findings, however, have demonstrated that an individual can produce a wide range of intrapersonal bimanual patterns within a few minutes of practice when provided integrated feedback. The present experiment was designed to directly compare intra- and interpersonal coordination performance and variability when provided Lissajous feedback or pacing metronome. Single participants (N=12) and pairs of participants (N=24, 12 pairs) were required to produce relative phase patterns between 0 and 180 in 30 increments using either pacing metronomes or Lissajous displays. The Lissajous displays involved a goal template and a cursor providing integrated feedback regarding the position of the two effectors. The results indicated both single and pairs of participants could effectively produce a large range of coordination patterns that typically act as repellers after only 6min of practice when provided integrated feedback. However, single participants performed the in-phase coordination pattern more accurately and with less variability than paired participants, regardless of the feedback condition. These results suggest an advantage for intrapersonal coordination when performing in-phase coordination, possibly due to the stabilizing effect occurring via the neuro-muscular linkage between effectors.
