Research on the development of expertise reveals that, in general,

Question

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Research on the development of expertise, including studies by psychologist K. Anders Ericsson, suggests that it generally takes about 10 years, or 10,000 hours, of dedicated practice to achieve expertise in most fields. This contradicts the notion that expertise is solely innate (A) or can be achieved in significantly shorter (B) or longer (D) periods of concentrated effort.

Research on the Development of Expertise Reveals That, in General