Spatial arrangement in texture discrimination and texture segregation.

Spatial arrangement in texture discrimination and texture segregation.
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DOI:
10.1068/i0515
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发表时间:
2013
期刊:
影响因子:
1.9
通讯作者:
Wagemans J
Wagemans J
中科院分区:
心理学4区
文献类型:
--
作者:
Vancleef K;Putzeys T;Gheorghiu E;Sassi M;Machilsen B;Wagemans J

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我们研究了纹理元素的空间排列的作用,在三个心理物理实验的纹理歧视和纹理分离。在我们的刺激,有向的Gabor元素形成了一个等取向和随机取向的纹理区域。我们操纵(1)通过向每个Gabor的方向添加方向抖动来在iso定向区域中的方向相似性;(2)Gabor的空间布置:准随机或规则;以及(3)两个纹理区域之间的边缘的形状:直的或弯曲的。在实验1中,受试者区分一个ISO取向的刺激,从刺激只有随机取向的元素。实验2要求纹理分离来判断纹理边缘的形状。实验3复制实验2与Gabor的一个较小的空间范围在一个密集的安排。我们发现可比的性能水平与定期和准随机的Gabor位置的歧视任务,但不是在隔离任务。我们的结论是,空间排列起着重要的作用,在纹理分离任务需要的纹理边缘的形状歧视,但不是在纹理歧视任务,它是足够的歧视一个ISO面向的区域从一个完全随机的区域。
We investigated the role of spatial arrangement of texture elements in three psychophysical experiments on texture discrimination and texture segregation. In our stimuli, oriented Gabor elements formed an iso-oriented and a randomly oriented texture region. We manipulated (1) the orientation similarity in the iso-oriented region by adding orientation jitter to the orientation of each Gabor; (2) the spatial arrangement of the Gabors: quasi-random or regular; and (3) the shape of the edge between the two texture regions: straight or curved. In Experiment 1, participants discriminated an iso-oriented stimulus from a stimulus with only randomly oriented elements. Experiment 2 required texture segregation to judge the shape of the texture edge. Experiment 3 replicated Experiment 2 with Gabors of a smaller spatial extent in a denser arrangement. We found comparable performance levels with regular and quasi-random Gabor positions in the discrimination task but not in the segregation tasks. We conclude that spatial arrangement plays a role in a texture segregation task requiring shape discrimination of the texture edge but not in a texture discrimination task in which it is sufficient to discriminate an iso-oriented region from a completely random region.
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