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首页> 外文期刊>The European Journal of Neuroscience >The role of spatial information in advance task-set control: an event-related potential study.
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The role of spatial information in advance task-set control: an event-related potential study.

机译：空间信息在预先任务控制中的作用：与事件相关的潜在研究。

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Task-switching has proved to be a fruitful paradigm for studying cognitive control mechanisms. Interestingly, this avenue of study has revealed that subjects are, to some degree, able to bring about a change in task-set prior to the performance of that task (provided that they are given advance warning of the upcoming task, for instance in the form of a cue). Event-related potentials (ERPs) have proved to be a good way of measuring these rapid anticipatory control processes. To explore these processes further, the current study examined the relationship between the availability of spatial information and cue-locked task-switching ERP effects. Two groups of subjects were compared: one group could separate the task-sets on the basis of the targets' colour (the 'colour' group), the second on the basis of the targets' location (the 'spatial' group). The performance of both groups benefited to the same extent from advance cueing of task-transitions (switches or repeats), yet the ERP data revealed cue-locked(but not target-locked) differences between the two groups. The most striking of these differences was the absence of both a late positivity over posterior scalp and a late negativity over frontal scalp when the spatial group switched between tasks. Thus, it seems unlikely that these effects index stimulus-response 'reconfiguration'per se--as the mappings were identical for both groups of subjects--but rather that these task-switching processes are sensitive to how the mappings are represented.
机译：事实证明，任务切换是研究认知控制机制的有效范例。有趣的是，这种研究方法表明，被试在某种程度上能够在执行任务之前改变任务集（前提是他们可以提前警告即将进行的任务，例如提示形式）。事件相关电位（ERP）已被证明是衡量这些快速预期控制过程的好方法。为了进一步探索这些过程，当前的研究检查了空间信息的可用性与提示锁定的任务切换ERP效果之间的关系。比较了两组对象：一组可以根据目标的颜色（“颜色”组）将任务集分开，另一组可以根据目标的位置（“空间”组）分开任务集。任务转换（切换或重复）的提前提示，两组的性能都得到了相同程度的好处，但是ERP数据显示两组之间的提示锁定（而非目标锁定）差异。这些差异中最显着的是，当空间组在任务之间切换时，既没有后头阳性，也没有后头阴性。因此，这些效应本身似乎不太可能刺激刺激-响应“重新配置”（因为两组受试者的映射是相同的），而是这些任务切换过程对映射的表示方式很敏感。

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