> What I’m willing to bet, however, is that you’ve heard of deliberate practice in the context of Malcolm Gladwell’s ‘10,000 hour rule’ — the mistaken notion th

> What I’m willing to bet, however, is that you’ve heard of deliberate practice in the context of Malcolm Gladwell’s ‘10,000 hour rule’ — the mistaken notion that 10,000 hours of practice would turn anyone, at any age, for any skill, into a master practitioner. Ericsson spent a lot of time and page space trying to distance himself from this "rule", but it's clear from his writing that he introduced it. See his 2007 HBR article (which lists it as a necessary condition): > By now it will be clear that it takes time to become an expert. Our research shows that even the most gifted performers need a minimum of ten years (or 10,000 hours) of intense training before they win international competitions. It's a confusing enough situation that Macnamara et al review the many places he discusses 10k hours (or 10 years) in their book chapter The Deliberate Practice View.