Attentional set interacts with perceptual load in visual search
Attentional set interacts with perceptual load in visual search
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DOI：
10.3758/bf03196622
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发表时间：
2004-08-01
影响因子：
3.5
通讯作者：
Belopolsky, AV
中科院分区：
文献类型：
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作者：
Theeuwes, J;Kramer, AF;Belopolsky, AV
在本研究中，我们检验了感知负荷是决定注意力选择效率的主要因素的假设。参与者在高负载和低负载的条件下执行视觉搜索任务。根据感知负荷假设，在单独的试验块中呈现高负荷和低负荷的条件导致仅在低负荷条件下处理被忽略的刺激（实验1）。然而，当高负载条件和低负载条件在试验组中随机混合时，参与者在两种条件下都表现出对被忽略的刺激的处理，这表明高感知负载不一定足以获得感知选择性（实验2）。对试验间转换效应的分析表明，在高负荷试验中，只有当前一个试验是低负荷试验时，才会发生对被忽略的刺激的处理。结果表明，低感知负荷可以引起广泛的注意力。加工。另一方面，当高负荷试验之前有另一个高负荷试验时，几乎没有观察到与任务无关的刺激的处理。目前的结果是根据期望与自下而上因素在注意选择效率中的相互作用进行讨论的。
In the present study, we examined the hypothesis that perceptual load is the primary factor that determines the efficiency of attentional selection. Participants performed a visual search task under conditions of high- and low-load. In line with the perceptual load hypothesis, presenting conditions of high- and low-load in separate blocks of trials resulted in processing of to-be-ignored stimuli only in the low-load condition (Experiment 1). However when high- and low-load conditions were randomly mixed in blocks of trials, the participants showed processing of to-be-ignored stimuli in both conditions, suggesting that high perceptual load is not necessarily sufficient to obtain perceptual selectivity (Experiment 2). An analysis of intertrial transition effects showed that on high-load trials, processing of to-be-ignored stimuli occurred only when the previous trial was a low-load trial. The results suggest that low perceptual load can engender broad attentional. processing. On the other hand, when a high-load trial was preceded by another high-load trial, little processing of task-irrelevant stimuli was observed. The present results are discussed in terms of the interaction between expectancies and bottom-up factors in the efficiency of attentional selection.