Abstract: 23 MD children and 24 average achievements peers were collected. A child wrote a line under spontaneous and dual-task conditions, a digitizing tablet was used to record the handwriting movements′ velocity and acceleration. Results(1)Writing a line under spontaneous condition, the velocity and acceleration values of the MD children were the same with those of their peers.(2)Writing a line under dual-task condition, the velocity and acceleration values of the MD children were significantly different from those of their peers, and their velocity and acceleration values were decreased remarkably.

Key words: handwriting movements, handwriting motor control, digitizing tablet, children with mathematical disabilities(MD), dual-task

摘要： 选取小学生47名,其中23名为数学不良,24名为一般儿童,使用数码写字板,测试二者在自然和双任务条件下,书写一条横线的速度、加速度。结果发现：（1）自然条件下书写,MD儿童的速度、加速度与一般儿童相一致,两者的差异均不显著。（2）双任务条件下书写,MD儿童的总体平均速度、加速度明显慢于一般儿童的,两者的差异均显著。

关键词: 书写运动, 书写运动控制, 数码写字板, 数学不良儿童, 双任务