It depends on when you look at it: Salience influences eye movements in natural scene viewing and search early in time
It depends on when you look at it: Salience influences eye movements in natural scene viewing and search early in time
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DOI：
10.1167/15.5.9
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发表时间：
2015-01-01
影响因子：
1.8
通讯作者：
Donk, Mieke
中科院分区：
文献类型：
--
作者：
Anderson, Nicola C.;Ort, Eduard;Donk, Mieke
人们普遍认为，在简单的人工创建的搜索显示中，显着性会影响眼球运动。然而，对于自然场景中的眼球运动还没有达成共识，有几篇报告认为，控制自然场景中的动眼行为的主要是高级认知因素。在这里，我们通过减少或增加图像上梯度的对比度来操纵图像上的显着性分布。我们记录了编码任务（实验 1）和视觉搜索任务（实验 2）中的眼球运动，并分析了整个场景观看过程中注视延迟与后续扫视目标之间的关系。我们发现，在编码和视觉搜索任务中，短延迟的第一次扫视比长延迟和后续的扫视更有可能落在图像中具有高显着性的区域。这意味着显着性确实会影响自然场景中的动眼行为，尽管时间尺度与之前报道的不同。我们讨论了与自然场景中眼跳控制的当前理论相关的发现。
It is generally accepted that salience affects eye movements in simple artificially created search displays. However, no such consensus exists for eye movements in natural scenes, with several reports arguing that it is mostly high-level cognitive factors that control oculomotor behavior in natural scenes. Here, we manipulate the salience distribution across images by decreasing or increasing the contrast in a gradient across the image. We recorded eye movements in an encoding task (Experiment 1) and a visual search task (Experiment 2) and analyzed the relationship between the latency of fixations and subsequent saccade targeting throughout scene viewing. We find that short-latency first saccades are more likely to land on a region of the image with high salience than long-latency and subsequent saccades in both the encoding and visual search tasks. This implies that salience indeed influences oculomotor behavior in natural scenes, albeit on a different timescale than previously reported. We discuss our findings in relation to current theories of saccade control in natural scenes.