Cherng Rong-Ju, Liang Ling-Yin, Chen Yung-Jung, Chen Jenn-Yeu
Department of Physical Therapy, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan.
Gait Posture. 2009 Feb;29(2):204-7. doi: 10.1016/j.gaitpost.2008.08.003. Epub 2008 Sep 21.
The effects of type (cognitive vs. motor) and difficulty level (easy vs. hard) of a concurrent task on walking were examined in 10 boys and 4 girls (age 4-6 years) with developmental coordination disorder (DCD) and 28 age- and gender-matched unaffected children. Each child performed free walking (single task), walking while carrying an empty tray (dual task, the concurrent task being motor and easy), walking while carrying a tray with 7 marbles (the concurrent task being motor and hard), walking while repeating a series of digits forward (the concurrent task being cognitive and easy), and walking while repeating the digits backward (the concurrent task being cognitive and hard). Walking was affected by the concurrent task (i.e., dual-task cost) in the children with DCD more so than in the comparison children. Greater task difficulty also increased the dual-task cost in the children with DCD more so than in the comparison children. These patterns were only noted for the motor concurrent task. The cognitive concurrent task also affected walking, but the dual-task costs did not differ between difficulty levels, nor between the groups.
研究了一项并发任务的类型（认知任务与运动任务）和难度水平（简单与困难）对10名患有发育性协调障碍（DCD）的男孩和4名女孩（年龄4至6岁）以及28名年龄和性别匹配的未受影响儿童行走的影响。每个孩子都进行了自由行走（单任务）、拿着空托盘行走（双任务，并发任务为运动且简单）、拿着装有7颗弹珠的托盘行走（并发任务为运动且困难）、向前重复一系列数字时行走（并发任务为认知且简单）以及向后重复数字时行走（并发任务为认知且困难）。与对照组儿童相比，并发任务（即双任务成本）对患有DCD的儿童行走的影响更大。更大的任务难度也比对照组儿童更能增加患有DCD的儿童的双任务成本。这些模式仅在运动并发任务中被观察到。认知并发任务也会影响行走，但双任务成本在难度水平之间以及两组之间没有差异。
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