Anchoring visual search in scenes: Assessing the role of anchor objects on eye movements during visual search
Anchoring visual search in scenes: Assessing the role of anchor objects on eye movements during visual search
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DOI：
10.1167/18.13.11
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发表时间：
2018-12-01
影响因子：
1.8
通讯作者：
Vo, Melissa L-H.
中科院分区：
文献类型：
--
作者：
Boettcher, Sage E. P.;Draschkow, Dejan;Vo, Melissa L-H.
现实世界场景的内容安排遵循一定的空间规则，允许非常有效的视觉探索。然而，不同类型的物体在场景中所扮演的角色还有待进一步研究。在目前的工作中，我们试图揭开场景的一个重要组成部分-锚对象。预测器保持关于环境中其他对象的可能位置的特定空间预测。在一系列的三个眼动追踪实验中，我们测试了锚对象在视觉搜索中扮演的角色。在所有的实验中，参与者都在场景中寻找在每次试验开始时提示的物体。关键的是，在一半的场景中，目标相关的锚被交换为不相关的，尽管语义上一致的对象。我们发现，相关的锚对象可以引导视觉搜索，从而导致更快的反应时间，更少的场景覆盖，以及更少的时间之间的固定锚和目标。锚对象的选择是通过一个独立的大型图像数据库，这使我们能够识别锚的关键属性确认。锚对象似乎在场景的空间布局中发挥着独特的作用，需要被考虑用于理解现实刺激中视觉搜索的效率。
The arrangement of the contents of real-world scenes follows certain spatial rules that allow for extremely efficient visual exploration. What remains underexplored is the role different types of objects hold in a scene. In the current work, we seek to unveil an important building block of scenes-anchor objects. Anchors hold specific spatial predictions regarding the likely position of other objects in an environment. In a series of three eye tracking experiments we tested what role anchor objects occupy during visual search. In all of the experiments, participants searched through scenes for an object that was cued in the beginning of each trial. Critically, in half of the scenes a target relevant anchor was swapped for an irrelevant, albeit semantically consistent, object. We found that relevant anchor objects can guide visual search leading to faster reaction times, less scene coverage, and less time between fixating the anchor and the target. The choice of anchor objects was confirmed through an independent large image database, which allowed us to identify key attributes of anchors. Anchor objects seem to play a unique role in the spatial layout of scenes and need to be considered for understanding the efficiency of visual search in realistic stimuli.