Skip to Main content Skip to Navigation
New interface
Journal articles

Detecting Deception in Movement: The Case of the Side-Step in Rugby

Sébastien Brault 1 Benoit Bideau 1, 2 Richard Kulpa 1, 2 Cathy Craig 3 
2 MIMETIC - Analysis-Synthesis Approach for Virtual Human Simulation
UR2 - Université de Rennes 2, Inria Rennes – Bretagne Atlantique , IRISA-D6 - MEDIA ET INTERACTIONS
Abstract : Although coordinated patterns of body movement can be used to communicate action intention, they can also be used to deceive. Often known as deceptive movements, these unpredictable patterns of body movement can give a competitive advantage to an attacker when trying to outwit a defender. In this particular study, we immersed novice and expert rugby players in an interactive virtual rugby environment to understand how the dynamics of deceptive body movement influence a defending player’s decisions about how and when to act. When asked to judge final running direction, expert players who were found to tune into prospective tau-based information specified in the dynamics of ‘honest’ movement signals (Centre of Mass), performed significantly better than novices who tuned into the dynamics of ‘deceptive’ movement signals (upper trunk yaw and out-foot placement) (p<.001). These findings were further corroborated in a second experiment where players were able to move as if to intercept or ‘tackle’ the virtual attacker. An analysis of action responses showed that experts waited significantly longer before initiating movement (p<.001). By waiting longer and picking up more information that would inform about future running direction these experts made significantly fewer errors (p<.05). In this paper we not only present a mathematical model that describes how deception in body-based movement is detected, but we also show how perceptual expertise is manifested in action expertise. We conclude that being able to tune into the ‘honest’ information specifying true running action intention gives a strong competitive advantage.
Document type :
Journal articles
Complete list of metadata
Contributor : Franck Multon Connect in order to contact the contributor
Submitted on : Friday, August 29, 2014 - 1:43:16 PM
Last modification on : Thursday, March 31, 2022 - 3:40:44 AM

Links full text



Sébastien Brault, Benoit Bideau, Richard Kulpa, Cathy Craig. Detecting Deception in Movement: The Case of the Side-Step in Rugby. PLoS ONE, 2012, 7 (6), pp.e37494. ⟨10.1371/journal.pone.0037494⟩. ⟨hal-01059120⟩



Record views