This is also true of developing expertise in sport. In sport, feedback is almost always instant and obvious. We know when we have hit a ball out of bounds in golf or mistimed a forehand in tennis. But enlightened training environments maximise the quantity and quality of feedback, thus increasing the speed of adaptation. Take football. Every time a player fails to control an incoming pass, he has learned something. Over time the central nervous system adapts, building more finesse and touch. But if a young player practises on a full-sized pitch, touching the ball infrequently, he will not
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