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Joint Action Syntax in Japanese Martial Arts

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Title: Joint Action Syntax in Japanese Martial Arts
Authors: Yamamoto, Yuji Browse this author
Yokoyama, Keiko Browse this author
Okumura, Motoki Browse this author
Kijima, Akifumi Browse this author
Kadota, Koji Browse this author
Gohara, Kazutoshi Browse this author
Issue Date: 4-Sep-2013
Publisher: Public library science
Journal Title: Plos one
Volume: 8
Issue: 9
Publisher DOI: 10.1371/journal.pone.0072436
Abstract: Participation in interpersonal competitions, such as fencing or Japanese martial arts, requires players to make instantaneous decisions and execute appropriate motor behaviors in response to various situations. Such actions can be understood as complex phenomena emerging from simple principles. We examined the intentional switching dynamics associated with continuous movement during interpersonal competition in terms of their emergence from a simple syntax. Linear functions on return maps identified two attractors as well as the transitions between them. The effects of skill differences were evident in the second- and third-order state-transition diagrams for these two attractors. Our results suggest that abrupt switching between attractors is related to the diverse continuous movements resulting from quick responses to sudden changes in the environment. This abrupt-switching-quick-response behavior is characterized by a joint action syntax. The resulting hybrid dynamical system is composed of a higher module with discrete dynamics and a lower module with continuous dynamics. Our results suggest that intelligent human behavior and robust autonomy in real-life scenarios are based on this hybrid dynamical system, which connects interpersonal coordination and competition.
Rights: http://creativecommons.org/licenses/by-nc-sa/2.1/jp/
Type: article
URI: http://hdl.handle.net/2115/53590
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 郷原 一寿

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