Franz E A, Zelaznik H N, Swinnen S S, Walter C
Department of Psychology, Box 56, University of Otago, Dunedin, New Zealand.
J Mot Behav. 2001 Mar;33(1):103-12. doi: 10.1080/00222890109601906.
When the left and right hands produce 2 different rhythms simultaneously, coordination of the hands is difficult unless the rhythms can be integrated into a unified temporal pattern. In the present study, the authors investigated whether a similar account can be applied to the spatial domain. Participants (N = 8) produced a movement trajectory of semicircular form in single-limb and bimanual conditions. In the bimanual tasks, 1 limb moved above the other in the frontal plane. Bimanual unified tasks were constructed so that the spatial paths to be produced by the 2 limbs could be easily conceptualized as parts of a unified circle pattern. Bimanual distinct tasks availed a less obvious spatial pattern that would unify the 2 tasks, despite similar demands placed on the coordination dynamics in the 2 cases (e.g., the phase relations). The authors conclude that a dual task becomes a single task, and interlimb interference is reduced, when the spatial patterns produced by the 2 hands form a geometric arrangement that can be conceptualized as a unified representation.
当左右手同时产生两种不同节奏时，除非这些节奏能够整合为一个统一的时间模式，否则双手的协调会很困难。在本研究中，作者调查了类似的情况是否适用于空间领域。参与者（N = 8）在单肢和双手条件下产生半圆形的运动轨迹。在双手任务中，一个肢体在额平面上位于另一个肢体上方。构建双手统一任务，以便两个肢体产生的空间路径可以很容易地被概念化为一个统一圆形模式的一部分。双手不同任务采用了一种不太明显的空间模式，尽管在这两种情况下对协调动力学的要求相似（例如相位关系），但这种模式会使两个任务统一起来。作者得出结论，当两只手产生的空间模式形成一种可以被概念化为统一表征的几何排列时，双重任务就变成了单一任务，并且肢体间干扰会减少。
