Institute of Psychological Sciences, University of Leeds, Leeds, UK.
J Exp Psychol Hum Percept Perform. 2012 Jun;38(3):687-702. doi: 10.1037/a0026123. Epub 2011 Nov 7.
Robust control of skilled actions requires the flexible combination of multiple sources of information. Here we examined the role of gaze during high-speed locomotor steering and in particular the role of feedback from the visible road edges. Participants were required to maintain one of three lateral positions on the road when one or both edges were degraded (either by fading or removing them). Steering became increasingly impaired as road edge information was degraded, with gaze being predominantly directed toward the required road position. When either of the road edges were removed, we observed systematic shifts in steering and gaze direction dependent upon both the required road position and the visible edge. A second experiment required fixation on the road center or beyond the road edges. The results showed that the direction of gaze led to predictable steering biases, which increased as road edge information became degraded. A new steering model demonstrates that the direction of gaze and both road edges influence steering in a manner consistent with the flexible weighted combination of near road feedback information and prospective gaze information.
稳健控制熟练动作需要灵活结合多种信息来源。在这里，我们研究了在高速运动转向过程中注视的作用，特别是来自可见道路边缘的反馈作用。当一条或两条道路边缘信息（通过模糊或移除）被破坏时，参与者被要求保持在道路上的三个横向位置之一。随着道路边缘信息的破坏，转向变得越来越困难，注视主要指向所需的道路位置。当其中一条道路边缘被移除时，我们观察到转向和注视方向的系统变化，这取决于所需的道路位置和可见的边缘。第二个实验要求注视道路中心或道路边缘之外。结果表明，注视方向导致可预测的转向偏差，随着道路边缘信息的破坏，这种偏差会增加。一个新的转向模型表明，注视方向和两条道路边缘以一种与接近道路反馈信息和前瞻性注视信息的灵活加权组合一致的方式影响转向。
