In game of tennis, seeing isn't always believing

A universal bias in the way people perceive moving objects means that tennis referees are more likely to make mistakes when they call balls "out" than when they call them "in," according to a new report in the October 28th issue of Current Biology, a Cell Press publication. Because recent rule changes allow professional tennis players to challenge the refs' calls, athletes could exploit the new findings to their advantage, according to researchers at the University of California, Davis.

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