judges chair tennis psychological
Monday, January 11, 2010
How To Make A Prawn Trap?
A new study, led by David Whitney, a professor at the Center for Mind and Brain, and Department of Psychology, University of California at Davis, shows that professional tennis umpires are vulnerable to some optical illusion when you see bouncing balls in a line or near it. The misperception, despite being common in the visual system has rarely been documented in sports.
The error occurs because the perception of our brain is delayed a few milliseconds with respect to reality. While the brain is processing the image of a moving object, received their eyes, the object and continued their movement. To offset this effect, the brain makes its estimates of where to go next in order, based on its speed and direction of his career. Most times these assumptions are successful, but if the object is moving very fast and experienced sudden changes in direction, like a tennis ball bounces, assumptions can lead to erroneous assessments.
Whitney and his team reviewed a random set of 4,457 points from Wimbledon 2007. In all cases was recorded when the tennis ball landed near or on the line, and three watchers looked each play individually. They also discussed the instant replays. Whitney
hoped that the arbitrators saw the ball rebound in the direction of its original motion, which would see more balls that landed outside the line. The hypothesis has proved true. 84 percent of the 83 incorrect trials was due to errors observed in which the ball was declared "out" when it really was inside.
Whitney and his team reviewed a random set of 4,457 points from Wimbledon 2007. In all cases was recorded when the tennis ball landed near or on the line, and three watchers looked each play individually. They also discussed the instant replays. Whitney
hoped that the arbitrators saw the ball rebound in the direction of its original motion, which would see more balls that landed outside the line. The hypothesis has proved true. 84 percent of the 83 incorrect trials was due to errors observed in which the ball was declared "out" when it really was inside.
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