Yang Lin-Dong, Yu Rui-Feng, Lin Xue-Lian, Xie Ya-Qing, Ma Liang
a Department of Industrial Engineering , Tsinghua University , Beijing , China.
Ergonomics. 2018 Feb;61(2):273-283. doi: 10.1080/00140139.2017.1353138. Epub 2017 Jul 13.
Visual lobe is a useful tool for predicting visual search performance. Up till now, no study has focused on dynamic visual lobe. This study developed a dynamic visual lobe measurement system (DVLMS) that could effectively map dynamic visual lobe and calculate visual lobe shape indices. The effects of display movement velocity on lobe shape indices were examined under four velocity conditions: 0, 4, 8 and 16 deg/s. In general, with the increase of display movement velocity, visual lobe area and perimeter became smaller, whereas lobe shape roundness, boundary smoothness, symmetry and regularity deteriorated. The elongation index was not affected by velocity. Regression analyses indicated that display movement velocity was important in determining dynamic visual lobe shape indices. Dynamic visual lobe provides another option for better understanding dynamic vision, in addition to dynamic visual acuity. Findings of this study can provide guidelines for analysing and designing dynamic visual tasks. Practitioner Summary: Dynamic visual lobe is important in reflecting the visual ability of searching for a moving target. We developed a dynamic visual lobe measurement system (DVLMS) and examined display movement velocity's effects on lobe shape. Findings revealed that velocity was a key factor affecting dynamic visual lobe shape indices.
视叶是预测视觉搜索性能的一种有用工具。到目前为止，尚无研究关注动态视叶。本研究开发了一种动态视叶测量系统（DVLMS），它能够有效地绘制动态视叶并计算视叶形状指数。在0、4、8和16度/秒这四种速度条件下，研究了显示运动速度对视叶形状指数的影响。总体而言，随着显示运动速度的增加，视叶面积和周长变小，而视叶形状的圆度、边界平滑度、对称性和规则性变差。伸长指数不受速度影响。回归分析表明，显示运动速度在确定动态视叶形状指数方面很重要。除了动态视力外，动态视叶为更好地理解动态视觉提供了另一种选择。本研究结果可为分析和设计动态视觉任务提供指导。从业者总结：动态视叶在反映搜索移动目标的视觉能力方面很重要。我们开发了一种动态视叶测量系统（DVLMS），并研究了显示运动速度对视叶形状的影响。结果表明，速度是影响动态视叶形状指数的关键因素。
