Target uncertainty does not lead to more distraction by singletons: Intertrial priming does
Target uncertainty does not lead to more distraction by singletons: Intertrial priming does
复制标题
DOI：
10.3758/bf03193640
复制
发表时间：
2005-11-01
期刊：
影响因子：
--
通讯作者：
Theeuwes, J
中科院分区：
文献类型：
--
作者：
Pinto, Y;Olivers, CNL;Theeuwes, J
在两个实验中，我们考察了为什么当目标身份不确定时，单一分心物体在视觉搜索中有更强的干扰效应。当参与者搜索一个形状时，在目标形状可以不同的混合块中，单一颜色分心物体的减慢效应比在目标形状保持不变的纯块中更大。重要的是，这种增加的独生子干扰效应可以完全追溯到试验间启动，因为增加的成本只发生在目标和独生子分心物交换身份的试验(实验1，允许在目标和独生子分心物之间启动)，或者发生在目标单独改变身份而独生子分心物保持不变的试验(实验2，只允许在目标之间打印)。这表明，目标的不确定性本身并不会导致单身人士注意选择的策略变化。取而代之的是，选择受到相对自动的启动机制的影响，这种机制可能会通过竞争注意力来增强。
In two experiments, we examined why a singleton distractor has a stronger interfering effect in visual search when the target identity is uncertain. When participants searched for a shape, a color singleton distractor had a larger slowing effect in a mixed block, in which the target shape could change from trial to trial, than in a pure block, in which the target shape remained the same. Importantly, this increased singleton distractor effect could be traced back entirely to intertrial priming, since the increased costs occurred only on trials in which the target and the singleton distractor swapped identity (Experiment 1, allowing for priming between targets and singleton distractors) or on trials in which the target alone changed identity while the singleton distractor remained constant (Experiment 2, allowing for printing between targets only). This suggests that target uncertainty itself does not lead to strategic changes in the attentional selection of singletons. Instead, selection is affected by relatively automatic priming mechanisms that may be enhanced by competition for attention.