Children with autism show local precedence in a divided attention task and global precedence in a selective attention task
Children with autism show local precedence in a divided attention task and global precedence in a selective attention task
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DOI：
10.1111/1469-7610.00489
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发表时间：
1999-07-01
影响因子：
7.6
通讯作者：
Rees, L
中科院分区：
文献类型：
--
作者：
Plaisted, K;Swettenham, J;Rees, L
被诊断为自闭症的儿童和正常发育的儿童被分配了两种不同的Navon任务（Navon, 1977），该任务要求对一个目标做出反应，这个目标可能出现在全球层面，也可能出现在局部层面，或者同时出现在两个层面。在分散注意力任务的一个变体中，没有向儿童提供任何关于目标在任何一次试验中出现的水平的信息。在另一项选择性注意任务中，孩子们被要求注意局部或全局水平。在分散注意任务中，正常发育儿童在目标出现在局部水平时出现的错误最多，而自闭症儿童在目标出现在全局水平时出现的错误最多。在选择性注意任务中，两组儿童对全局目标的反应都快于对局部目标的反应。自闭症儿童在一项任务中存在正常的全局加工，而在另一项任务中没有，这是根据在缺乏显性启动或对局部信息的自愿选择性注意的情况下抑制局部信息的机制缺陷来讨论的。
Children with a diagnosis of autism and typically developing children were given two variations of the Navon task (Navon, 1977), which required responding to a target that could appear at the global level, the local level, or both levels. In one variation, the divided attention task, no information was given to children regarding the level at which a target would appear on any one trial. In the other, the selective attention task, children were instructed to attend to either the local or the global level. Typically developing children made most errors when the target appeared at the local level whereas children with autism made more errors when the target appeared at the global level in the divided attention task. Both groups of children were quicker to respond to the global target than the local target in the selective attention task. The presence of normal global processing in the children with autism in one task but not in the other is discussed in terms of a deficit in mechanisms that inhibit local information in the absence of overt priming or voluntary selective attention to local information.