Developmental characteristics of the upper limb and the finger functions in handwriting and clarification of clumsiness factors

本研究的目的是显示一个新的系统，作者已经开发的笔迹评估的特点，记录在进行手写任务的笔速度和笔压力的变化。结果显示，学龄儿童的偏离距离、平均笔速和平均笔压的发展特点。成人组在三角形的一侧沿着画线时，笔速有一个规律，即从画线的起点开始增加，从画线的中点开始减小。关于书写任务期间笔压力的变化，它从一开始就突然增加。另一方面，对于7岁儿童组在书写任务中的笔速和笔压的变化，很少有儿童表现出与成人相似的模式。笨拙儿童组的偏离距离和平均笔速显著大于7岁儿童组。而7岁儿童组笔速的规律性要比笨拙儿童组好

The study aims to show the characteristics of a handwriting assessed by new system which the authors have developed, to record changes in pen velocity and pen pressure during conducting handwriting tasks. As the results, developmental characteristics of stray distance, average of the pen velocity, and average of pen pressure in school age children were shown. In adults group, during drawing a line along with one side of the triangle, the pen velocity had a regularity which increased from the beginning and decreased from about the middle of the line. Regarding the change in pen pressure during the handwriting tasks, it increased suddenly from the beginning. Then it continued increasing gently and decreased suddenly just before completion of the task.On the other hand, as for the change in pen velocity and pen pressure during the handwriting tasks obtained from 7 years old children group, there were few child who showed a pattern similar to adults. Clumsy children group has significantly longer stray distance and average of pen velocity than 7 years old children group. However, 7 years old child group has more a regularity of pen velocity than clumsy children group