Attentional load interferes with target localization across saccades.
Attentional load interferes with target localization across saccades.
复制标题
注意力负荷会干扰眼跳中的目标定位。
DOI：
10.1007/s00221-014-4062-2
复制
发表时间：
2014
影响因子：
2
通讯作者：
MacInnes WJ
中科院分区：
文献类型：
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作者：
MacInnes WJ
世界上物体的视网膜位置随着每一次眼球运动而改变，但我们似乎很容易从一次注视到另一次注视跟踪空间信息。我们考察了注意力在跨眼跳定位中的作用，方法是要求参与者在完成一项需要注意的次要任务的同时定位目标。在第一个实验中，注意负荷降低了记忆目标的定位精度，但只有在目标呈现和报告之间有眼跳时才会降低。然后我们重复了这个实验，并包括了一个显著的里程碑，它在一半的试验中发生了变化。在高注意负荷下，移动标志对定位的影响更大，说明在高注意负荷下，观察者对定位判断的依赖程度要高于低注意负荷。结果表明，当视觉地标不可用时，注意促进了基于凝视中心坐标空间更新的跨扫视定位判断。可靠地标的可用性(在大多数自然情况下存在)可以补偿稀缺的注意资源对跨眼跳定位的影响。
The retinal positions of objects in the world change with each eye movement, but we seem to have little trouble keeping track of spatial information from one fixation to the next. We examined the role of attention in trans-saccadic localization by asking participants to localize targets while performing an attentionally demanding secondary task. In the first experiment, attentional load decreased localization precision for a remembered target, but only when a saccade intervened between target presentation and report. We then repeated the experiment and included a salient landmark that shifted on half the trials. The shifting landmark had a larger effect on localization under high load, indicating that observers rely more on landmarks to make localization judgments under high than under low attentional load. The results suggest that attention facilitates trans-saccadic localization judgments based on spatial updating of gaze-centered coordinates when visual landmarks are not available. The availability of reliable landmarks (present in most natural circumstances) can compensate for the effects of scarce attentional resources on trans-saccadic localization.