The Interaction Between the Edge Effect and Target Conspicuity in Visual Search
通过两个实验研究了视觉搜索中边缘效应与目标显著性的交互作用，发现边缘效应的大小不受目标显著性影响，但边缘效应减小时，不显著与显著目标的搜索时间差异增大。
The term "edge effect" in visual search is used to describe the finding that targets appearing in the outer half of a display have longer search times than those appearing in the inner half. The interaction between the edge effect and target conspicuity was explored using two experiments. Under conditions of target uncertainty, it was shown that the magnitude of the edge effect was unaffected by target conspicuity. In addition, two manipulations of the edge effect indicated that as the edge effect decreased, the difference between the search times of inconspicuous and conspicuous targets increased. The results are explained in terms of a model based upon the size of the "mesh" of fixations used to cover the display. Two computer simulations confirmed that the size of this mesh and the magnitude of the edge effect are inextricably related.