Multiple levels of orientation anisotropy in crowding with Gabor flankers
Multiple levels of orientation anisotropy in crowding with Gabor flankers
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DOI：
10.1167/11.13.18
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发表时间：
2011-01-01
影响因子：
1.8
通讯作者：
Sagi, Dov
中科院分区：
文献类型：
--
作者：
Livne, Tomer;Sagi, Dov
使用定向的Gabor贴片，我们发现，对于近基数目标方向，斜侧翼的方向诱导更多的干扰比基数侧翼的方向。在侧翼定位的局部和全局水平上都观察到这种模式。关于全局方向（侧翼围绕目标的全局排列），两个基本方向的影响之间没有差异，并且都诱导了相同量的干扰。关于局部取向（伽柏取向），根据以前的报告，发现两个基本取向的影响之间的差异-相当数量的干扰与侧翼在取向上与目标相等（尽管小于与斜侧翼），并且几乎没有干扰来自与目标正交的侧翼。拥挤也受到基于目标固定轴（径向、切向和对角线）的各向异性和侧翼关系的影响。后一种因素的重要性相对于前一种因素来说是很小的。影响拥挤的多个因素，以及在两个方向水平的影响之间的相似性和差异，表明拥挤是由多个干扰源在几个层次的代表性。
Using oriented Gabor patches, we found that for nearly cardinal target orientations, oblique flankers' orientations induced more interference than did cardinal flankers' orientations. This pattern was observed both at the local and global levels of flankers' orientation. With respect to the global orientation (flankers' global arrangement around the target), there was no difference between the effects of the two cardinal orientations, and both induced the same amount of interference. With respect to the local orientation (Gabors' orientation), in accordance with previous reports, a difference was found between the effects of the two cardinal orientations-a considerable amount of interference with flankers equal in orientation to the target (although less than with the oblique flankers) and almost no interference from flankers orthogonal to the target. Crowding was also affected by an anisotropy based on the target-fixation axis (radial, tangential, and diagonal) and by the flankers' relations. The magnitude of these latter factors was small relative to that of the former ones. The multiple factors that affected crowding, as well as the similarities and the differences between the effects at the two orientation levels, suggest that crowding is determined by multiple sources of interference operating at several levels of representation.