How fast can you change your mind? The speed of top-down guidance in visual search
How fast can you change your mind? The speed of top-down guidance in visual search
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DOI：
10.1016/j.visres.2003.11.024
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发表时间：
2004-06-01
期刊：
影响因子：
1.8
通讯作者：
Vasan, N
中科院分区：
文献类型：
--
作者：
Wolfe, JM;Horowitz, TS;Vasan, N
大多数实验室视觉搜索任务涉及对同一目标的多次搜索，而在真实的世界中，我们通常会在每次搜索时改变目标（例如找到咖啡杯，然后找到糖）。视觉系统多快可以重新配置以搜索新目标？在这里，观察员搜索的目标所指定的线索在不同的SOA相对于搜索刺激。在每次试验中搜索不同的靶点与在一组试验中搜索相同的靶点进行比较。实验一和实验二表明，一个精确的图片线索在200 ms内起作用，使不同的目标连接搜索的速度和效率的封锁连接搜索。文字提示是缓慢的，从来没有那么有效。实验3复制了这一结果与任务，需要自上而下的信息，目标身份。实验4表明，一个确切的图片线索的影响不是强制性的。实验5和实验6使用真实的物体的图片来提示类别水平的目标。(C)2004 Elsevier Ltd.保留所有权利。
Most laboratory visual search tasks involve many searches for the same target, while in the real world we typically change our target with each search (e.g. find the coffee cup, then the sugar). How quickly can the visual system be reconfigured to search for a new target? Here observers searched for targets specified by cues presented at different SOAs relative to the search stimulus. Search for different targets on each trial was compared to search for the same target over a block of trials. Experiments I and 2 showed that an exact picture cue acts within 200 ms to make varied target conjunction search as fast and efficient as blocked conjunction search. Word cues were slower and never as effective. Experiment 3 replicated this result with a task that required top-down information about target identity. Experiment 4 showed that the effects of an exact picture cue were not mandatory. Experiments 5 and 6 used pictures of real objects to cue targets by category level. (C) 2004 Elsevier Ltd. All rights reserved.