Costs of a predictable switch between simple cognitive tasks following severe closed-head injury
Costs of a predictable switch between simple cognitive tasks following severe closed-head injury
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DOI：
10.1037/0894-4105.20.6.675
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发表时间：
2006-11-01
期刊：
影响因子：
2.4
通讯作者：
Langill, Michelle
中科院分区：
文献类型：
--
作者：
Schmitter-Edgecombe, Maureen;Langill, Michelle
作者使用可预测的外部提示任务切换范例来研究严重闭合性头部损伤 (CHI) 人群的执行控制。每 4 次试验中，18 名患有严重 CHI 的个体和 18 名对照者在分类数字是奇数还是偶数以及字母是辅音还是元音之间切换。目标刺激出现在一个圆圈中，分为 8 个相等的部分。刺激的呈现顺时针旋转。参与者以短（200 毫秒）和长（1,000 Ins）准备间隔执行切换任务。尽管 CHI 参与者表现出较慢的响应时间和较高的转换成本，与对照组相似，但额外的准备时间降低了转换成本，并且转换成本仅限于运行中的第一个试验。这些发现表明，患有严重CHI的参与者能够利用时间为任务切换做准备，并且涉及切换成本的执行控制流程在第一次试验结束之前完成。
The authors used a predictable, externally cued task-switching paradigm to investigate executive control in a severe closed-head injury (CHI) population. Eighteen individuals with severe CHI and 18 controls switched between classifying whether a digit was odd or even and whether a letter was a consonant or vowel on every 4th trial. The target stimuli appeared in a circle divided into 8 equivalent parts. Presentation of the stimuli rotated clockwise. Participants performed the switching task at both a short (200 ms) and a long (1,000 Ins) preparatory interval. Although the participants with CHI exhibited slower response times and greater switch costs, similar to controls, additional preparatory time reduced the switch costs, and the switch costs were limited to the 1st trial in the run. These findings indicate that participants with severe CHI were able to take advantage of time to prepare for the task switch, and the executive control processes involved in the switch costs were completed before the 1st trial of the run ended.