Using spatial uncertainty to manipulate the size of the attention focus.

Using spatial uncertainty to manipulate the size of the attention focus.
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利用空间不确定性来操纵注意力焦点的大小

DOI:
10.1038/srep32364
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发表时间:
2016-09-01
期刊:
影响因子:
4.6
通讯作者:
Chen Y
Chen Y
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Huang D;Xue L;Wang X;Chen Y

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优先处理与行为相关的信息对灵长类动物的生存至关重要。在视觉空间注意力研究中,操控注意力焦点的空间范围是一个重要问题。尽管许多研究声称通过改变目标位置的不确定性(空间不确定性)或调整引导注意力焦点的线索大小,成功调整了注意力范围的大小,但尚无系统性研究对这些方法的有效性进行评估和比较。我们采用了一种多线索范式,以目标位置为中心设置2.5°和7.5°的圆环来测量线索大小效应,同时通过改变线索提示位置的数量来操控空间不确定性水平。我们发现,空间不确定性对目标检测过程中的反应时间有显著影响,而线索大小效应则不那么显著。我们还仔细地在小区域或大区域内改变潜在目标位置的空间范围,发现这种空间不确定性的变化量也能显著影响目标检测速度。我们的研究结果表明,在操控注意力范围大小时,调整空间不确定性比改变线索大小更为有效。
Preferentially processing behaviorally relevant information is vital for primate survival. In visuospatial attention studies, manipulating the spatial extent of attention focus is an important question. Although many studies have claimed to successfully adjust attention field size by either varying the uncertainty about the target location (spatial uncertainty) or adjusting the size of the cue orienting the attention focus, no systematic studies have assessed and compared the effectiveness of these methods. We used a multiple cue paradigm with 2.5° and 7.5° rings centered around a target position to measure the cue size effect, while the spatial uncertainty levels were manipulated by changing the number of cueing positions. We found that spatial uncertainty had a significant impact on reaction time during target detection, while the cue size effect was less robust. We also carefully varied the spatial scope of potential target locations within a small or large region and found that this amount of variation in spatial uncertainty can also significantly influence target detection speed. Our results indicate that adjusting spatial uncertainty is more effective than varying cue size when manipulating attention field size.
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