Ericsson, K. A., Krampe, R. T., & Tesch-Römer, C. (1993). The role of deliberate practice in the acquisition of expert performance. Psychological Review, 100(3), 363.
The path to expert performance from youthful interest: Bloom’s three-phase model of talent development
The criteria for expertise change dramatically as performance levels increase
This type of practice requires considerable resources: Bloom reports that parents of aspiring expert-level competitors spend most of their free time shuttling them to related activities; they may move to be closer to better training facilities; they spend huge amounts of money on top-tier coaches.
Deliberate practice is high-effort
::left off p. 371::
Bloom, B. S. (1985). Generalizations about talent development. In B. S. Bloom (Ed.), Developing talent in young people. Ballantine Books.