Pellecchia G L, Turvey M T
Department of Physical Therapy, College of Education, Nursing and Health Professions, University of Hartford, 200 Bloomfield Avenue, West Hartford, CT 06117-1599, USA.
J Mot Behav. 2001 Mar;33(1):9-15. doi: 10.1080/00222890109601898.
The attractors of bimanual rhythmic coordination are given as the solutions of a motion equation in relative phase. How are those attractors affected by cognitive activity? In 3 experiments, participants (N = 10 in Experiments 1 and 2; N = 5 in Experiment 3) were required to produce in-phase or antiphase coordination while they either did or did not perform an information-reduction task. The average absolute deviation from in-phase (0 degrees ) and antiphase (180 degrees ) satisfying a particular parameterization of the motion equation was amplified by cognitive activity. That amplification of absolute phase shift was the same for both in-phase and antiphase coordination. Furthermore, the amplification (in degrees) increased linearly with the magnitude of cognitive activity (in bits). Cognitive activity had limited influence on the variability of relative phase and did not affect its average signed deviation. Collectively, the results suggest that cognitive activity produces a shift in the attractors of bimanual coordination dynamics that is directionally nonspecific and is independent of movement speed, detuning, and the in-phase-antiphase distinction.
双手节律性协调的吸引子是相对相位运动方程的解。这些吸引子如何受到认知活动的影响？在3项实验中，要求参与者（实验1和2中N = 10；实验3中N = 5）在进行或不进行信息简化任务时产生同相或反相协调。满足运动方程特定参数化的与同相（0度）和反相（180度）的平均绝对偏差因认知活动而增大。同相和反相协调的绝对相移放大情况相同。此外，放大程度（以度为单位）随认知活动量（以比特为单位）线性增加。认知活动对相对相位的变异性影响有限，且不影响其平均符号偏差。总体而言，结果表明认知活动会使双手协调动力学的吸引子发生偏移，这种偏移在方向上是非特异性的，且与运动速度、失调以及同相 - 反相区别无关。
