Human Motor Systems Laboratory, School of Physical Education and Sport, University of São Paulo, Brazil.
Percept Mot Skills. 2012 Aug;115(1):153-65. doi: 10.2466/10.25.PMS.115.4.153-165.
This study compared intermanual performance asymmetry between adults and children of different ages in timing components of an aiming task. Participants manipulated a computer mouse with either hand, aiming to rapidly reach targets of different widths with a pointer on a monitor. Results showed longer deceleration movements with the left hand in children, leading to increased intermanual performance asymmetry when aiming at narrower targets. Increased intermanual performance asymmetry in children is conceptualized to derive from planning to minimize trajectory variability when controlling the nondominant hand.
本研究比较了不同年龄的成人和儿童在指向任务的计时成分中的手间表现不对称性。参与者用一只手操作电脑鼠标，用显示器上的指针快速指向不同宽度的目标。结果显示，儿童用左手的减速运动时间更长，导致在瞄准较窄的目标时手间表现的不对称性增加。儿童手间表现不对称性的增加被认为是源自于控制非优势手时规划以最小化轨迹变异性。
