The effect of the first glimpse at a scene on eye movements during search
The effect of the first glimpse at a scene on eye movements during search
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DOI：
10.3758/s13423-011-0205-7
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发表时间：
2012-04-01
影响因子：
3.5
通讯作者：
Benson, Valerie
中科院分区：
文献类型：
--
作者：
Hillstrom, Anne P.;Scholey, Helen;Benson, Valerie
当通过一个窗口（窗口观看）观看时，简单地预览场景可以更有效地找到目标物体。相反，显示一个随机排列的搜索显示的预览，当在搜索过程中查看是完整的显示时，并不有利于搜索效率。在这里，我们测试了当场景在搜索过程中完全可见时，场景预览是否有益。当呈现场景预览时，持续时间为250毫秒。在搜索过程中，现场要么是完全可见的，要么是窗口。从减少最初关注和对目标做出反应的时间以及关注的总数来看，预览总是有好处的。在窗口可见度中，预览减少了从目标位置到至少第四次注视的距离。在完全可见的情况下，预习减少了第二次固定的距离，但对以后的固定没有影响。从最初对场景的一瞥中获得的主旨信息允许在信息丰富的位置放置前一两个注视点，但是当非中央凹信息可用时，随后的眼球运动仅由在线信息引导。
Previewing scenes briefly makes finding target objects more efficient when viewing is through a gaze-contingent window (windowed viewing). In contrast, showing a preview of a randomly arranged search display does not benefit search efficiency when viewing during search is of the full display. Here, we tested whether a scene preview is beneficial when the scene is fully visible during search. Scene previews, when presented, were 250 ms in duration. During search, the scene was either fully visible or windowed. A preview always provided an advantage, in terms of decreasing the time to initially fixate and respond to targets and in terms of the total number of fixations. In windowed visibility, a preview reduced the distance of fixations from the target position until at least the fourth fixation. In full visibility, previewing reduced the distance of the second fixation but not of later fixations. The gist information derived from the initial glimpse of a scene allowed for placement of the first one or two fixations at information-rich locations, but when nonfoveal information was available, subsequent eye movements were only guided by online information.