Microsaccades are different from saccades in scene perception
Microsaccades are different from saccades in scene perception
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DOI：
10.1007/s00221-010-2272-9
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发表时间：
2010-06-01
影响因子：
2
通讯作者：
Engbert, Ralf
中科院分区：
文献类型：
--
作者：
Mergenthaler, Konstantin;Engbert, Ralf
眼睛注视持续时间是视觉任务中持续认知的最佳和最广泛使用的测量方法之一，例如，阅读、视觉搜索或场景感知。然而，注视的特征是持续的运动活动（或注视性眼球运动），其中微扫视是其最明显的组成部分。最近的工作表明，微扫视和检查扫视的相似之处。在这里，我们表明，微扫视和检查扫视的不同属性可以在场景感知任务中找到，基于描述性措施（例如，双峰幅度分布）以及功能特性（例如，扫视事件间隔和产生过程）。除了这些具体的差异，微扫视率由个人参与者在一个固定的范例相关的微扫视率提取固定在场景感知，表明一个共同的神经生理学基础。最后，我们观察到，缓慢的固定眼动，称为漂移，显着减少在长时间的固定在现场观看，这通知现场观看的眼动控制。
Eye-fixation durations are among the best and most widely used measures of ongoing cognition in visual tasks, e.g., reading, visual search or scene perception. However, fixations are characterized by ongoing motor activity (or fixational eye movements) with microsaccades as their most pronounced components. Recent work demonstrated the similarities of microsaccades and inspection saccades. Here, we show that distinct properties of microsaccades and inspection saccades can be found in a scene perception task, based on descriptive measures (e.g., a bimodal amplitude distribution) as well as functional characteristics (e.g., inter saccadic-event intervals and generating processes). Besides these specific differences, microsaccade rates produced by individual participants in a fixation paradigm are correlated with microsaccade rates extracted from fixations in scene perception, indicating a common neurophysiological basis. Finally, we observed that slow fixational eye movements, called drift, are significantly reduced during long fixations in scene viewing, which informs about the control of eye movements in scene viewing.