不同特征维度下ADHD儿童的任务切换特点

本研究采用双向刺激设置,通过操纵两实验的特征维度,以考察任务维度对ADHD儿童任务切换的影响。结果发现,在两个实验中,相对于正常组儿童,ADHD儿童在任务切换上都表现出缺损。当注意维度相同时,ADHD儿童在固定顺序上的切换损耗大于随机顺序,但在跨维度任务中,ADHD儿童在固定顺序上的切换损耗则小于随机顺序,这与正常儿童的表现模式不一致。该结果表明,工作记忆会对ADHD儿童产生影响,但这取决于任务的特征维度是否一致。

The Effect of Dimensionalities of the Task Stimulus on Task Switching in Children with Attention Deficit Hyperactivity Disorder

The aim of the present study was to examine the effect of dimensionalities of the task stimulus on task switching in children with attention deficit hyperactivity disorder(ADHD).In the present study,two experiments were conducted.Results showed that both in the two experiments,compared to normal children,children with ADHD had slower response times and less accurate responses.In the first condition,which the dimensionality of the task stimulus is the same,children with ADHD showed more switching cost at the fixed sequence than at the random sequence.But in the second condition,which the dimensionalities of the task stimulus are different, children with ADHD showed more switching cost at the random sequence than at the fixed sequence.The results indicated that the different loads of the working memory may affect the task switching in children with ADHD,but it only occurred when the attention dimensionality of the task stimulus were the same.