Spatial statistics for gaze patterns in scene viewing: Effects of repeated viewing.
Spatial statistics for gaze patterns in scene viewing: Effects of repeated viewing.
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DOI：
10.1167/19.6.5
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发表时间：
2017-04
影响因子：
1.8
通讯作者：
H. Trukenbrod;S. Barthelmé;Felix Wichmann;Ralf Engbert
中科院分区：
文献类型：
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作者：
H. Trukenbrod;S. Barthelmé;Felix Wichmann;Ralf Engbert
场景观察被用来研究复杂但仍然受控的环境中的注意选择。在场景观看过程中对眼睛运动的主要观察之一是固定位置的不均匀分布：虽然图像的某些部分被几乎所有观察者固定，并且被同一观察者重复检查，但其他图像部分即使在长时间的探索间隔之后也保持不固定。在这里，我们应用空间点加工的方法来研究注视对之间的关系。更准确地说，我们使用对相关函数，一个强大的统计工具，以评估固定位置之间的依赖关系沿着个人扫描路径。我们证明，4°内的注视位置的聚集比偶然的预期更强。此外，对相关函数揭示了更强的聚合时，相同的图像是第二次呈现的注视。我们使用的动力学模型的模拟表明，一个较窄的空间注意广度可以解释对同一图像的第一次和第二次检查之间的相关性的差异。
Scene viewing is used to study attentional selection in complex but still controlled environments. One of the main observations on eye movements during scene viewing is the inhomogeneous distribution of fixation locations: While some parts of an image are fixated by almost all observers and are inspected repeatedly by the same observer, other image parts remain unfixated by observers even after long exploration intervals. Here, we apply spatial point process methods to investigate the relationship between pairs of fixations. More precisely, we use the pair correlation function, a powerful statistical tool, to evaluate dependencies between fixation locations along individual scanpaths. We demonstrate that aggregation of fixation locations within 4° is stronger than expected from chance. Furthermore, the pair correlation function reveals stronger aggregation of fixations when the same image is presented a second time. We use simulations of a dynamical model to show that a narrower spatial attentional span may explain differences in pair correlations between the first and the second inspection of the same image.