📖Summing up hours of any type of practice versus identifying optimal practice activities
- authors
- Ericsson, K. Anders
- year
- 2016
- url
- https://doi.org/10.1177/1745691616635600
- Macnamara…2016 summed up different types of activities, not only deliberate practice
- activities included group activities, watching games on television, and even play and competition
- designed by teacher or coach
- beginner’s performance is often correlated with general ability tests (like IQ), but expert’s rely on domain-specific skills and models which removes reliance on general abilities (and removes correlation)
Flaws of Macnamara…2016 (and Macnamara…2014)
- included studies that analyzed non-expert performance (small percentile of experts present in the study)
- some studies with real deliberate practice and very high correlation (0.87 / 0.92) were excluded from meta-analysis
- studies that included multiple activities (both deliberate practice and not) with different correlations from -0.51 to 0.62 were averaged to 0.17 and included in meta analysis
- includes studies with subjective estimates of performance