Craig Cathy M, Berton Eric, Rao Guillaume, Fernandez Laure, Bootsma Reinoud J
Movement and Perception, University of the Mediterranean, Marseille, France.
Naturwissenschaften. 2006 Feb;93(2):97-101. doi: 10.1007/s00114-005-0071-0. Epub 2006 Feb 1.
This study examined whether adding spin to a ball in the free kick situation in football affects a professional footballer's perception of the ball's future arrival position. Using a virtual reality set-up, participants observed the flight paths of aerodynamically realistic free kicks with (+/-600 rpm) and without sidespin. With the viewpoint being fixed in the centre of the goal, participants had to judge whether the ball would have ended up in the goal or not. Results show that trajectories influenced by the Magnus force caused by sidespin gave rise to a significant shift in the percentage of goal responses. The resulting acceleration that causes the ball to continually change its heading direction as the trajectory unfolds does not seem to be taken into account by the participants when making goal judgments. We conclude that the visual system is not attuned to such accelerated motion, which may explain why goalkeepers appear to misjudge the future arrival point of such curved free kicks.
本研究考察了在足球任意球情况下给球施加旋转是否会影响职业足球运动员对球未来到达位置的感知。通过虚拟现实装置，参与者观察了带有（±600转/分钟）和不带有侧旋的空气动力学逼真的任意球飞行轨迹。视点固定在球门中心，参与者必须判断球是否会落入球门。结果表明，由侧旋引起的马格努斯力影响的轨迹导致进球判断百分比出现显著变化。当轨迹展开时，导致球不断改变其前进方向的加速度在参与者进行进球判断时似乎未被考虑在内。我们得出结论，视觉系统无法适应这种加速运动，这可能解释了为什么守门员似乎会误判这种弧线任意球的未来到达点。
