Department of Psychology, Arizona State University, Box 871104, Tempe, AZ 85287, USA.
Exp Brain Res. 2011 Jun;211(3-4):459-69. doi: 10.1007/s00221-011-2707-y. Epub 2011 May 6.
Intra- and interpersonal coordination was investigated using a bimanual Fitts' law task. Participants tapped rhythmically between pairs of targets. Tapping was performed with one hand (unimanual), two hands (intrapersonal coordination), and one hand together with another participant (interpersonal coordination). The sizes and distances of targets in a pair were manipulated independently for each hand. When target difficulty was unequal across hands, movement times were similar in the coordination conditions, in violation of Fitts' law. Processing speed (measured by index of performance) increased for more difficult tasks, suggesting increased attention, even for dyads. These findings suggest that similar processes, not captured by centralized control, guide coordination for both individuals and dyads. Measures of coordination, though, still showed stronger coordination tendencies for intrapersonal coordination, indicating a possible role for centralized mechanisms.
本研究采用双手 Fitts 任务考察了个体内和个体间的协调性。参与者在两对目标之间有节奏地敲击。敲击可以单手完成（单侧协调），也可以双手同时完成（个体内协调），或者一只手与另一名参与者共同完成（个体间协调）。每只手的一对目标的大小和距离可以独立操纵。当双手的目标难度不同时，协调条件下的运动时间相似，违反了 Fitts 定律。对于更难的任务，处理速度（以绩效指数衡量）会提高，这表明即使是在双人组中，注意力也会增加。这些发现表明，类似的过程（而非集中控制）指导了个体和双人组的协调。不过，协调措施仍显示出个体内协调更强的协调趋势，表明集中机制可能发挥作用。
