Amblyopic perception of biological motion
Amblyopic perception of biological motion
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DOI：
10.1167/8.4.22
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发表时间：
2008-01-01
影响因子：
1.8
通讯作者：
Hess, Robert F.
中科院分区：
文献类型：
--
作者：
Thompson, Benjamin;Troje, Nikolaus F.;Hess, Robert F.
虽然已经确定了弱视的一些低水平的视觉缺陷，但仍不清楚这些缺陷在整个视觉处理层次中延伸到什么程度。生物运动知觉可以是局部和全局视觉处理的一个有用的措施，因为经常被用来研究这种能力的点光刺激携带局部运动和全局形状信息。为了研究弱视患者生物运动处理系统的完整性，我们采用了检测和辨别任务，其中包括单独或嵌入不同类型点光掩模中的相干或加扰点光步行者。这些操作允许控制的形式和/或运动信息的量可用于任务性能的观察员。我们发现弱视眼可以处理点光行走者的整体形式和局部运动分量，表明对这些刺激的完整处理。然而，弱视的眼睛确实表现出增加的易感性，增加掩蔽点，这表明信号与噪声的分离在弱视中是不足的。
Although a number of low-level visual deficits in amblyopia have been identified, it is still unclear to what extent these deficits extend throughout the visual processing hierarchy. Biological motion perception can be a useful measure of local and global visual processing since the point-light stimuli that are often used to study this ability carry both local motion and global form information. To investigate the integrity of the biological motion processing system in amblyopia, we employed both detection and discrimination tasks with coherent or scrambled point-light walkers either alone or embedded in different types of point-light masks. These manipulations allowed for control over the amount of form and/or motion information available to the observers that could be used for task performance. We found that amblyopic eyes could process both the global form and local motion components of point-light walkers, indicating intact processing for these stimuli. However, amblyopic eyes did show an increased susceptibility to the addition of masking dots suggesting that segregation of signal from noise is deficient in amblyopia.