Department of Industrial Engineering, Tsinghua University, Beijing, 100084, China.
Sci Rep. 2017 Nov 2;7(1):14921. doi: 10.1038/s41598-017-14999-1.
The effect of motion on visual search has been extensively investigated, but that of uniform linear motion of display on search performance for tasks with different target-distractor shape representations has been rarely explored. The present study conducted three visual search experiments. In Experiments 1 and 2, participants finished two search tasks that differed in target-distractor shape representations under static and dynamic conditions. Two tasks with clear and blurred stimuli were performed in Experiment 3. The experiments revealed that target-distractor shape representation modulated the effect of motion on visual search performance. For tasks with low target-distractor shape similarity, motion negatively affected search performance, which was consistent with previous studies. However, for tasks with high target-distractor shape similarity, if the target differed from distractors in that a gap with a linear contour was added to the target, and the corresponding part of distractors had a curved contour, motion positively influenced search performance. Motion blur contributed to the performance enhancement under dynamic conditions. The findings are useful for understanding the influence of target-distractor shape representation on dynamic visual search performance when display had uniform linear motion.
运动对视觉搜索的影响已经得到了广泛的研究，但在具有不同目标-干扰形状表示的任务中，显示的匀速直线运动对搜索性能的影响却很少被探索。本研究进行了三个视觉搜索实验。在实验 1 和实验 2 中，参与者在静态和动态条件下完成了两个具有不同目标-干扰形状表示的搜索任务。实验 3 进行了两个具有清晰和模糊刺激的任务。实验结果表明，目标-干扰形状表示调制了运动对视觉搜索性能的影响。对于目标-干扰形状相似性低的任务，运动对搜索性能有负面影响，这与之前的研究一致。然而，对于目标-干扰形状相似性高的任务，如果目标与干扰物的区别在于目标上增加了一条具有线性轮廓的间隙，而相应的干扰物部分具有弯曲的轮廓，运动则会对搜索性能产生积极影响。运动模糊有助于动态条件下的性能提升。这些发现对于理解在显示具有匀速直线运动时目标-干扰形状表示对动态视觉搜索性能的影响是有用的。
