Here's one of the original papers that put forth the theory of deliberate practice and the 10,000 hour rule (though in the paper it is given as a 10-year rule):

Here's one of the original papers that put forth the theory of deliberate practice and the 10,000 hour rule (though in the paper it is given as a 10-year rule): http://projects.ict.usc.edu/itw/gel/EricssonDeliberatePracticePR93.pdf http://projects.ict.usc.edu/itw/gel/EricssonDeliberatePracti... The Cambridge Handbook of Expertise and Expert Performance also covers a wide range of research on performance and expertise in various areas http://www.amazon.com/Cambridge-Expertise-Performance-Handbooks-Psychology/dp/0521600812 http://www.amazon.com/Cambridge-Expertise-Performance-Handbo...