Searching night and day: A dissociation of effects of circadian phase and time awake on visual selective attention and vigilance
Searching night and day: A dissociation of effects of circadian phase and time awake on visual selective attention and vigilance
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DOI：
10.1046/j.0956-7976.2003.psci_1464.x
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发表时间：
2003-11-01
影响因子：
8.2
通讯作者：
Czeisler, CA
中科院分区：
文献类型：
--
作者：
Horowitz, TS;Cade, BE;Czeisler, CA
困倦如何影响选择性注意力？我们研究了昼夜节律和清醒时间对视觉搜索的影响。广义认知减慢假说预测，搜索速度将较慢，功能指导的情感，和反应时间（RT）延长时，观察者是困倦的。观察员进行空间配置（发现5之间的2秒）和连接（发现红色垂直之间的红色水平和绿色垂直）搜索任务在38小时的清醒状态下恒定的条件。不良的昼夜节律和清醒时间确实导致RT增加（纠正错误）。然而，与假设相反，检索率（通过RT X集大小斜率索引）在整个方案中保持恒定。这是真的，为连接以及空间配置搜索，表明功能指导也是不敏感的困倦。困倦对搜索的影响可能位于注意力选择瓶颈的下游。观察者确实在昏昏欲睡的时候用准确性换取了速度。这意味着决策阶段的障碍。
How does sleepiness affect selective attention? We studied the effect of circadian phase and time awake on visual search. The generalized-cognitive-slowing hypothesis predicts that search rate will be slower, feature guidance less affective, and response time (RT) lengthened when observers are sleepy. Observers performed spatial-configuration (finding a 5 among 2s) and conjunction (finding red vertical among red horizontal and green vertical) search tasks during 38 hr of wakefulness under constant conditions. Adverse circadian phases and elapsed time awake did lead to increased RT (corrected for errors). However contrary to the hypothesis, search rates (indexed by RT X Set Size slopes) were constant across the protocol. This was true,for conjunction as well as for spatial-configuration search, indicating that feature guidance was also insensitive to sleepiness. The locus of sleepiness effects on search is probably downstream from the bottleneck of attentional selection. Observers did trade accuracy for speed when sleepy. This implicates decision-stage impairments.