What Is The 10.000 Rule?

In Outliers, Malcolm Gladwell examines the factors that contribute to high levels of success. The "10,000-Hour Rule", claiming that the key to achieving world-class expertise in any skill, is, to a large extent, a matter of practicing the correct way, for a total of around 10,000 hours, though the authors of the original study this was based on have disputed Gladwell's usage.