Sensitivity of the lane change test as a measure of in-vehicle system demand
Sensitivity of the lane change test as a measure of in-vehicle system demand
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DOI：
10.1016/j.apergo.2010.06.020
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发表时间：
2011-05-01
影响因子：
3.2
通讯作者：
Williamson, Amy R.
中科院分区：
文献类型：
--
作者：
Young, Kristie L.;Lenne, Michael G.;Williamson, Amy R.
变道测试 (LCT) 是越来越多的方法之一，旨在量化因使用车载设备而导致的驾驶性能下降。除了有效性和可靠性之外，为了使此类测试具有实际用途，它还必须对各个任务的不同需求保持敏感。当前的研究评估了最近的几个 LCT 横向控制和事件检测参数区分具有不同需求水平的视觉手动和认知替代车载信息系统任务的能力。 27 名参与者（平均年龄 24.4 岁）在执行视觉搜索和数学问题解决任务的同时完成了 PC 版本的 LCT。发现许多横向控制指标对任务差异很敏感，但事件检测指标不太能够区分任务。平均偏差和车道偏移测量能够区分视觉任务和认知任务，但对不同级别的任务需求不太敏感。检查的其他 LCT 指标对任务差异不太敏感。影响至少某些 LCT 指标敏感性的主要因素可能是向参与者发出的变道指令的类型。提供清晰明确的变道指令并进一步细化其指标对于提高 LCT 作为评估工具的效用至关重要。 (C) 2010 Elsevier Ltd 和人体工程学协会。版权所有。
The Lane Change Test (LCT) is one of the growing number of methods developed to quantify driving performance degradation brought about by the use of in-vehicle devices. Beyond its validity and reliability, for such a test to be of practical use, it must also be sensitive to the varied demands of individual tasks. The current study evaluated the ability of several recent LCT lateral control and event detection parameters to discriminate between visual-manual and cognitive surrogate In-Vehicle Information System tasks with different levels of demand. Twenty-seven participants (mean age 24.4 years) completed a PC version of the LCT while performing visual search and math problem solving tasks. A number of the lateral control metrics were found to be sensitive to task differences, but the event detection metrics were less able to discriminate between tasks. The mean deviation and lane excursion measures were able to distinguish between the visual and cognitive tasks, but were less sensitive to the different levels of task demand. The other LCT metrics examined were less sensitive to task differences. A major factor influencing the sensitivity of at least some of the LCT metrics could be the type of lane change instructions given to participants. The provision of clear and explicit lane change instructions and further refinement of its metrics will be essential for increasing the utility of the LCT as an evaluation tool. (C) 2010 Elsevier Ltd and The Ergonomics Society. All rights reserved.