Department of Psychology, University of Bologna, Viale Berti Pichat, 5, 40127 Bologna, Italy.
Department of Civil, Chemical, Environmental and Material Engineering, University of Bologna, Viale Risorgimento, 2, 40136 Bologna, Italy.
Appl Ergon. 2018 May;69:48-57. doi: 10.1016/j.apergo.2017.12.017. Epub 2018 Jan 12.
The distance of first-fixation to vertical road signs was assessed in 22 participants while driving a route of 8.34 km. Fixations to road signs were recorded by a mobile eye-movement-tracking device synchronized to GPS and kinematic data. The route included 75 road signs. First-fixation distance and fixation duration distributions were positively skewed. Median distance of first-fixation was 51 m. Median fixation duration was 137 ms with a modal value of 66 ms. First-fixation distance was linearly related to speed and fixation duration. Road signs were gazed at a much closer distance than their visibility distance. In a second study a staircase procedure was used to test the presentation-time threshold that lead to a 75% accuracy in road sign identification. The threshold was 35 ms, showing that short fixations to a road signs could lead to a correct identification.
在 22 名参与者驾驶 8.34 公里的路线时，评估了他们对垂直路标首次注视的距离。通过与 GPS 和运动数据同步的移动眼动追踪设备记录对路标的注视。该路线包括 75 个路标。首次注视距离和注视持续时间的分布呈正偏态。首次注视的中位数距离为 51 米。注视持续时间的中位数为 137 毫秒，模态值为 66 毫秒。首次注视距离与速度和注视持续时间呈线性关系。路标被注视的距离比它们的可见距离近得多。在第二项研究中，使用了阶梯程序来测试导致路标识别准确率达到 75%的呈现时间阈值。该阈值为 35 毫秒，表明对路标进行短暂注视就可以进行正确的识别。
