Mayeur Anaïs, Brémond Roland, Bastien J M Christian
Laboratoire Central des Ponts et Chaussées, Paris, France.
Hum Factors. 2008 Aug;50(4):712-21. doi: 10.1518/001872008X312260.
The aim of this work is to assess how adding a driving-related task affects the detection of objects in peripheral vision, under mesopic conditions.
The main index used to assess the quality of road lighting installations refers to simple detection tasks in foveal vision, which raises methodological and practical questions.
The experimental design consisted of a three-phase experiment. In the first phase, two groups (control and experimental) performed a peripheral detection task (simple task). Based on these results an individual detection threshold was computed for each participant and eccentricity. A tracking task was performed in Phase 2 for both groups (steering a tracking target along a circuit, on a screen). In the third phase, the control group performed the same task as in Phase 2. The experimental group performed a double task, with a tracking (primary) task and a peripheral detection (secondary) task.
The data show an effect of the tracking task and eccentricity on peripheral event detection. The tracking task caused detection performance to decrease from 84.2% to 67.5%, p < .001.
The small target visibility model used in road lighting may be improved, taking into account the effects of task and eccentricity on target detection.
This study supports improved roadway lighting design by guiding consideration of sign eccentricity and task load.
本研究旨在评估在中视条件下，增加一项与驾驶相关的任务如何影响周边视觉中物体的检测。
用于评估道路照明设施质量的主要指标涉及中央凹视觉中的简单检测任务，这引发了方法学和实际应用方面的问题。
实验设计包括一个分三个阶段的实验。在第一阶段，两组（对照组和实验组）执行一项周边检测任务（简单任务）。基于这些结果，为每个参与者和不同的偏心度计算个体检测阈值。在第二阶段，两组都执行一项跟踪任务（在屏幕上沿着一个回路操纵跟踪目标）。在第三阶段，对照组执行与第二阶段相同的任务。实验组执行一项双重任务，包括一项跟踪（主要）任务和一项周边检测（次要）任务。
数据显示跟踪任务和偏心度对周边事件检测有影响。跟踪任务导致检测性能从84.2%降至67.5%，p <.001。
考虑到任务和偏心度对目标检测的影响，道路照明中使用的小目标可见度模型可能需要改进。
本研究通过引导对照明标志偏心度和任务负荷的考虑来支持改进道路照明设计。
