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Concurrent Cognitive Task Modulates Coordination Dynamics
Author(s) -
Pellecchia Geraldine L.,
Shockley Kevin,
Turvey M. T.
Publication year - 2005
Publication title -
cognitive science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.498
H-Index - 114
eISSN - 1551-6709
pISSN - 0364-0213
DOI - 10.1207/s15516709cog0000_12
Subject(s) - attractor , task (project management) , cognition , nonlinear system , computer science , magnification , phase (matter) , control theory (sociology) , statistical physics , mathematics , artificial intelligence , psychology , physics , control (management) , mathematical analysis , engineering , neuroscience , quantum mechanics , systems engineering
Does a concurrent cognitive task affect the dynamics of bimanual rhythmic coordination? In‐phase coordination was performed under manipulations of phase detuning and movement frequency and either singly or in combination with an arithmetic task. Predicted direction‐specific shifts in stable relative phase from 0° due to detuning and movement frequency were amplified by the cognitive task. Nonlinear cross‐recurrence analysis suggested that this cognitive influence on the locations of the stable points or attractors of coordination entailed a magnification of attractor noise without a reduction in attractor strength. An approximation to these findings was achieved through parameter changes in a motion equation in relative phase. Results are discussed in terms of dual‐task performance as limited resources, dynamics rather than chronometrics, and reparameterization rather than degradation.