00:00 Talk 1: Information-reduction tasks and the attractive states of interlimb coordination dynamics Michael Turvey & Geraldine Pellecchia Centre for the Ecological Study of Perception and Action, University of Connecticut
19:30 Q & A. John Kennedy asks how "choking" in high performance sport - the breakdown of coordination under extreme pressure - can be addressed by the coordination dynamics framework.
21:37 Talk 2: Attention and the dynamics of speech-hand coordination Paul Treffner & Mira Peter Metaffordance consultants & University of Waikato, New Zealand
International Conference on Perception and Action, ICPA 12 Gold Coast, Australia, July 2003
-These two consecutive talks are presented together as each examines coordinated rhythmic movement under attentional constraints using the HKB dynamical systems model. Mike Turvey first describes his work on attention with Geraldine Pellecchia (who sadly is no longer with us). Using cognitive attention tasks that are - importantly - quantifiable, Turvey shows how different amounts of attention act in predictable and quantifiable ways upon the observed bimanual coordination pattern. It does this in terms of shifting the dynamic stability of the system - the attractors - away from their "standard" locations.
At 21:37 - Following Turvey's talk is Dr. Paul Treffner with Dr. Mira Peter (in the front row during Q&A) on the dynamics of speech-hand coordination. This research attempts to push the "fundamental law of coordination" - with handedness, asymmetries, and attentional terms added - towards capturing a nontrivial and complex achievement - rhythmically speaking while precisely coordinating the hand. The HKB equation is used to include not only handedness/attentional lateralities (d-term), biomechanical asymmetry (delta-omega: jaw and finger), but also what might be considered an "intentional" parameter - the hitherto ignored c-term - which makes a critical contribution to this model. This "intentional parameter" captures something beyond attention. It captures the stress and difficulty of maintaining performance of a highly demanding task, which anti-phase speech-hand coordination is an example of. The HKB parameters are changed and their consequences graphically illustrated to show the complexity and power of the HKB coordination law. It suggests how lawfully governed coordination is implicit in simple but subtle nonlinear dynamical systems models. These are prime examples of formal and final cause in biological movement.