Fixation-related potentials in visual search: A combined EEG and eye tracking study
Fixation-related potentials in visual search: A combined EEG and eye tracking study
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DOI：
10.1167/12.7.4
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发表时间：
2012-01-01
影响因子：
1.8
通讯作者：
Sigman, Mariano
中科院分区：
文献类型：
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作者：
Kamienkowski, Juan E.;Ison, Matias J.;Sigman, Mariano
我们报告了一项研究，同时眼球运动和脑电图（EEG）记录，而受试者自由探索搜索阵列寻找隐藏的目标。我们描述了一个序列的固定事件相关电位（fERPs），展开在类似的400毫秒后，每个固定。这一序列非常类似于事件相关的反应，在重放实验中，受试者保持固定，而一系列的图像发生在中央凹周围模拟的空间和时间模式，在自由观看实验。在第二个对照实验中也观察到类似的反应，其中刺激的出现由实验者控制并呈现在屏幕的中心。我们还观察到一个相对较早的组件（类似于150毫秒），区分目标和干扰，只有在freeviewing条件。我们提出了一种新的方法来匹配的关键属性的两个条件（目标/干扰），它可以很容易地适应于其他范例，以调查EEG组件在自由眼球运动。
We report a study of concurrent eye movements and electroencephalographic (EEG) recordings while subjects freely explored a search array looking for hidden targets. We describe a sequence of fixation-event related potentials (fERPs) that unfolds during similar to 400 ms following each fixation. This sequence highly resembles the event-related responses in a replay experiment, in which subjects kept fixation while a sequence of images occurred around the fovea simulating the spatial and temporal patterns during the free viewing experiment. Similar responses were also observed in a second control experiment where the appearance of stimuli was controlled by the experimenters and presented at the center of the screen. We also observed a relatively early component (similar to 150 ms) that distinguished between targets and distractors only in the freeviewing condition. We present a novel approach to match the critical properties of two conditions (targets/distractors), which can be readily adapted to other paradigms to investigate EEG components during free eye-movements.