摘要
为定量探究年龄、环境照度和视标速度对中老年人夜间动态有效视野特征变化的影响,采用动态有效视野测试系统(DVLMS)对24位被试进行动态视觉搜索任务测试,并通过绘制有效视野形状图进一步分析有效视野缺失情况。研究结果表明:中老年人夜间动态有效视野随年龄增加而显著减小,均在61~65岁出现显著性下降;随视标移动速度增加而显著减小,且相较于年龄其减小程度更大;其中有效视野周长从16(°)/s、有效视野面积从8(°)/s、有效视野褶皱性在32(°)/s时开始显著下降;有效视野周长、有效视野面积随环境照度上升而显著增加;其中有效视野周长从20 lx、有效视野面积在20 lx时开始显著增加;有效视野角度均值在8°~17°,随年龄、视标移动速度增加而减小;有效视野形状缺失情况随年龄增加、视标移动速度增加逐渐严重,左方及下方有效视野缺失情况尤为明显。研究结果可为评价中老年人夜间视觉搜索绩效以及设计相应的训练提供参考。
In order to quantitatively explore the effects of age,environmental illumination and moving speed of visual target on the changes in the dynamic effective visual field characteristics of middle-aged and elderly people at night,the Dynamic Visual Lobe Measurement System(DVLMS)was used to test the dynamic visual search task on 24 subjects.The effective field of view shape map was used to further analyze the absence of effective field of view.The results show as follows.The characteristics of dynamic effective visual field at night for middle-aged and elderly people:Decrease significantly with the increase of age,and there is a significant decrease in the age of 61~65.Decrease significantly with the increase of the moving speed of the visual target,and the degree of decrease is greater than that of age.Among them,the perimeter of the effective field of view decreased from 16(°)/s,the area of effective field of view decreased from 8(°)/s,and the rugosity of effective field of view decreased at 32(°)/s.The perimeter and area of the effective field of view increase significantly with the increase of environmental illuminance.The perimeter of the effective field of view starts to increase significantly from 20 lx and the area of the effective field of view at 20 lx.The mean value of the effective field of view angle is between 8°~17°and decreases with the increase of age and visual target speed.The lack of effective visual field shape becomes more serious with the increase of age and the moving speed of the visual target speed,and the lack of effective visual field on the left and below is particularly obvious.The results can provide a reference for the evaluation of night visual search performance of middle-aged and elderly people and the design of corresponding training.
作者
秦华
刘孟歆
冉令华
邬歆
QIN Hua;LIU Meng-xin;RAN Ling-hua;WU Xin(School of Mechanical-Electronic and Automobile Engineering, Beijing University of Civil Engineering and Architecture, Beijing 102616, China;China National Institute of Standardization, Beijing 100191, China;Beijing HuiYunYiTing Network Technology Co. Ltd., Beijing 100084, China)
出处
《科学技术与工程》
北大核心
2021年第30期12845-12853,共9页
Science Technology and Engineering
基金
北京社会科学基金一般项目(19GLB029)。
关键词
动态有效视野
视觉搜索
中老年人
有效视野缺失
dynamic effective field of vision
visual search
middle-aged and old people
absence of effective field of vision
