Visual search tasks: measurement of dynamic visual lobe and relationship with display movement velocity

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 o...

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Bibliographic Details
Published in:Ergonomics 2018-02, Vol.61 (2), p.273-283
Main Authors: Yang, Lin-dong, Yu, Rui-feng, Lin, Xue-lian, Xie, Ya-qing, Ma, Liang
Format: Article
Language:English
Subjects:
Acuity
dynamic
Elongation
Performance prediction
Regression analysis
Roundness
Shape
Shape effects
Smoothness
Space life sciences
Velocity
Visual acuity
Visual aspects
Visual lobe
Visual perception
visual search
Visual tasks
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Summary: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.
ISSN:0014-0139
1366-5847
DOI:10.1080/00140139.2017.1353138