Exploring collective dynamics using an audio-visualization technique

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This research used an audio-visualization technique to explore a simple principle underlying thecollective dynamics occurring during sports activities. We focused on the game of tag and on the Japanese martial art of kendo as examples of interpersonal competition and on football games as an example of team competition. In kendo, the interpersonal distance and velocity of stepping away andforward were measured for each competitor as collective variables. These variables were visualized using a point-light display with auditory signals, and the possibility of discriminating between skill levels was examined in psychological experiments. Additionally, relative phase analysis was applied to the data, and abrupt switching between in- and anti-phase synchronization at a critical interpersonal distance was shown in both tag and kendo. In football games, the boundary between two competitive teams was depicted by adapting the pressure fields defined by the Gaussian distributions for each player. This boundary was able express the chance of attack and the game momentum.