[Plough_Jogger]

A research paper authored last year cited a study which found that only 30% of the variation in performance could be attributed to deliberate practice.

http://www.sciencedirect.com/science/article/pii/S0160289613...

[roadnottaken]

Very interesting, thanks

[b_emery]

Which begs the question, what percent of the variation distinguishes the 'expert' from the non-expert?