Disentangling the effects of spatial inconsistency of targets and distractors when searching in realistic scenes.
Disentangling the effects of spatial inconsistency of targets and distractors when searching in realistic scenes.
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DOI：
10.1167/15.2.12
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发表时间：
2015-02
影响因子：
1.8
通讯作者：
S. Spotorno;George L. Malcolm;B. Tatler
中科院分区：
文献类型：
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作者：
S. Spotorno;George L. Malcolm;B. Tatler
以前的研究表明，正确放置的物体有助于眼睛的引导，但也违反场景内的空间关联的对象可能会优先选择和随后的检查。我们分析了视觉搜索中空间期望和目标模板（精确图片或文字标签）的眼引导，同时考虑了物体空间不一致性对中心凹外或中心凹加工的影响。此外，我们隔离搜索中断由于误导的空间期望的目标从搜索行为的影响场景内的空间不一致。可靠的空间预期和精确的目标模板提高了所有搜索阶段的眼科效率。当模板引导不足以确保从一开始就进行有效搜索并且错位的对象比始终放置在同一场景区域中的对象更大时，空间不一致会导致优先扫视选择。这种优先顺序主要出现在对该区域的早期检查期间，但是不一致的对象也倾向于在整个区域查看中优先固定。这些结果表明，对象首先选择隐蔽的基础上，它们的相对大小和随后的公开的选择是考虑对象上下文关联处理中心凹外视觉。一旦物体被注视，不一致性导致较长的第一注视持续时间和较长的总停留时间。作为一个整体，我们的研究结果表明，所观察到的损害oculabular行为时，寻找一个令人难以置信的放置目标是由于不可靠的空间预期和优先级不一致的对象之前和期间的对象固定中断的组合产品。
Previous research has suggested that correctly placed objects facilitate eye guidance, but also that objects violating spatial associations within scenes may be prioritized for selection and subsequent inspection. We analyzed the respective eye guidance of spatial expectations and target template (precise picture or verbal label) in visual search, while taking into account any impact of object spatial inconsistency on extrafoveal or foveal processing. Moreover, we isolated search disruption due to misleading spatial expectations about the target from the influence of spatial inconsistency within the scene upon search behavior. Reliable spatial expectations and precise target template improved oculomotor efficiency across all search phases. Spatial inconsistency resulted in preferential saccadic selection when guidance by template was insufficient to ensure effective search from the outset and the misplaced object was bigger than the objects consistently placed in the same scene region. This prioritization emerged principally during early inspection of the region, but the inconsistent object also tended to be preferentially fixated overall across region viewing. These results suggest that objects are first selected covertly on the basis of their relative size and that subsequent overt selection is made considering object-context associations processed in extrafoveal vision. Once the object was fixated, inconsistency resulted in longer first fixation duration and longer total dwell time. As a whole, our findings indicate that observed impairment of oculomotor behavior when searching for an implausibly placed target is the combined product of disruption due to unreliable spatial expectations and prioritization of inconsistent objects before and during object fixation.