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

该研究旨在展示作者开发的新系统评估的笔迹特征，以记录在进行手写任务时笔速和笔压的变化。结果显示了学龄儿童在偏离距离、笔速平均值和笔压平均值方面的发育特征。成人组在沿三角形的一边画直线时，笔速有从起点开始增大到线中间左右减小的规律。对于书写任务中笔压的变化，从一开始就突然增加。然后它继续缓慢增加，并在任务完成前突然下降。另一方面，从7岁儿童组中获得的书写任务中，笔速和笔压的变化很少有儿童表现出与成人相似的模式。笨手笨脚儿童组的散乱距离和平均笔速明显长于7岁儿童组。然而，7岁儿童组的笔速比笨拙儿童组有更多的规律性

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