Kerr R
Percept Mot Skills. 1975 Aug;41(1):151-4. doi: 10.2466/pms.1975.41.1.151.
Serial tapping by 5-, 7- and 9-yr.-old boys and girls, as measured by Fitts' Law, was recorded. 60 Ss performed a reciprocal tapping task and were assessed developmentally via hand-wrist X-rays. No significant relationship was found between the fine motor task and skeletal age. The results of the motor task suggest an improvement in movement time, with age, due to an ability to plan subsequent movements rather than simply an increase in speed of arm movement.
记录了5岁、7岁和9岁男孩女孩按照菲茨定律进行的连续敲击情况。60名受试者执行了一项往复敲击任务，并通过手腕X光片进行发育评估。在精细运动任务和骨骼年龄之间未发现显著关系。运动任务的结果表明，随着年龄增长，运动时间有所改善，这是由于能够规划后续动作，而不仅仅是手臂运动速度的提高。
