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The Swedish Psychologist K. Anders Ericsson has published many reports stating that talent is "made and not born". In his book 'The Cambridge Handbook of Expertise and Expert Performance', he has stated that "Consistently and overwhelmingly, the evidence showed that experts are always made, not born."

On the other hand, a recent twin study has stated that on average, a human's ability is 50% influenced by genetic factors, and 50% influenced by environmental factors. This seems to contradict Ericsson's experiment, as he has asserted that genetic factors influence a person's abilities by less than 1%.

Does the twin study contradict Ericsson's assertions, and if so, why would there be such a large contradiction? What factors could have caused these large differences in findings?

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Ericsson’s studies have repeatedly ignored the genetics of performance in any field. His favourite study of expert performance - the London taxi driver experiment - also failed to control for prior genetic attributes that may have led these taxi drivers into their professions in the first place. A good place to start perhaps:

Hambrick et al 2014 Deliberate practice and performance in music, games, sports, education, and professions: A meta-analysis

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Some of the information contained in this post requires additional references. Please edit to add citations to reliable sources that support the assertions made here. Unsourced material may be disputed or deleted.

  • $\begingroup$ Ok, Ericsson may have repeatedly ignored genetics, but you haven't provided any strong evidence within your answer to prove that. What is your answer anyway? Does the twin study successfully disprove Erisson? $\endgroup$ – Chris Rogers Sep 22 at 11:51
  • $\begingroup$ Did you read the paper referenced? It’s in there $\endgroup$ – Nick H Sep 22 at 15:56

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