Basically the key point of his article was that expertise should be viewed in terms of measurable goals and objectives. Research now agrees with that view. Dr.

Basically the key point of his article was that expertise should be viewed in terms of measurable goals and objectives. Research now agrees with that view. Dr. K. Anders Ericsson, one of the world's leading researchers on expertise has done some interesting research on this.http://projects.ict.usc.edu/itw/gel/EricssonDeliberatePracticePR93.pdf http://projects.ict.usc.edu/itw/gel/EricssonDeliberatePracti... The pdf mentions some research that showed that plateaus in learning Morse code were not intrinsic to learning but were dependent on the training methods used to learn Research does show that it matters whether you choose to focus on one specific subset of the activity, or whether you just practice the activity. Deliberate practice requires that you work with the specific goal of improving a specific weakness. The fact that benefit from practice starts to decline after two hours demonstrates the amount of effort required in deliberate practice.