World

Practice Makes Perfect, If Your Genes Play Along

Aug. 20 (Bloomberg) -- Like many others who read Malcolm Gladwell’s book “Outliers” when it came out five years ago, I was impressed by the 10,000-hour rule of expertise. I wrote a column (for a different publication) espousing the rule, which holds that to become a world-class competitor at anything from chess to tennis to baseball, all that’s required is 10,000 hours of deliberate practice.

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