THE EFFECT OF SIMILARITY AND DURATION ON SPATIAL INTERACTION IN PERIPHERAL-VISION
THE EFFECT OF SIMILARITY AND DURATION ON SPATIAL INTERACTION IN PERIPHERAL-VISION
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DOI：
10.1163/156856894x00350
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发表时间：
1994-01-01
期刊：
影响因子：
--
通讯作者：
LEVI, DM
中科院分区：
文献类型：
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作者：
KOOI, FL;TOET, A;LEVI, DM
空间相互作用在周边视野中是广泛的，延伸到目标的视网膜偏心率的大约一半（Toet和Levi，Vision Res.32，1349-1357，1992）。本研究表明，外周空间相互作用的程度和范围在很大程度上取决于测试和侧翼刺激之间的相似性。刺激包括一个测试T，周围有四个分散注意力的侧翼T，每个随机定向。任务是确定测试T的方向。测试和侧翼Ts不同的对比极性，形状，深度，颜色，眼睛的起源，或对比。当目标和侧腹在对比极性、深度或形状上不同时，所有观察者的表现都显著改善。颜色差异增强了大多数但不是所有观察者的表现。眼睛的起源没有影响，也就是说，空间的相互作用是相同的，当目标和侧翼提出了同一只眼睛，或对眼。刺激持续时间在空间相互作用中的作用在另外两个实验中进行了研究。在第一个实验中，刺激观察持续时间增加，以使观察者有时间连续搜索测试T。在第二个实验中，在测试T的位置呈现后掩码。这些实验的结果表明，相似性的影响是独立的刺激持续时间和postmask，并建议串行搜索不发挥重要作用，在这里报道的空间相互作用的影响。空间相互作用的程度与并行搜索的能力相关。
Spatial interactions are extensive in the peripheral visual field, extending up to about half the retinal eccentricity of the target (Toet and Levi, Vision Res. 32, 1349-1357, 1992). In the present study it is shown that the degree and extent of peripheral spatial interaction depends in large measure on the similarity between test and flanking stimuli. The stimulus consisted of a test T surrounded by four distracting flanking Ts, each randomly oriented. The task was to determine the orientation of the test T. The test and flanking Ts differed in contrast polarity, shape, depth, color, eye of origin, or contrast. When the target and flanks differed in contrast polarity, depth, or shape, performance improved markedly for all observers. A color difference enhanced the performance of most but not all observers. Eye-of-origin had no effect, that is, spatial interaction was identical when the target and flanks were presented to the same eye, or to opposite eyes. The role of stimulus duration in spatial interaction was examined in two additional experiments. In the first, the stimulus viewing duration was increased in order to allow the observer time to serially search for the test T. In the second experiment, a postmask was presented at the location of the test T. The results of these experiments showed that the influence of similarity was independent of stimulus duration and the postmask, and suggest that serial search does not play an important role in the spatial interaction effects reported here. The extent of spatial interaction is correlated with the ability to do parallel search.