Along with his colleagues in this field, Ericsson established a remarkable foundation of work (documented in several books and most recently in the appropriately Bible-size Cambridge Handbook of Expertise and Expert Performance). Its central tenet is a Gibraltar-like statistic: every expert in every field is the result of around ten thousand hours of committed practice. Ericsson called this process “deliberate practice” and defined it as working on technique, seeking constant critical feedback, and focusing ruthlessly on shoring up weaknesses.
