Syntes: Deliberate Practice and Proposed Limits on the Effects of Practice on the Acquisition of Expert Performance: Why the Original Definition Matters and Recommendations for Future Research (2019)

Källa: https://doi.org/10.3389/fpsyg.2019.02396 (Frontiers in Psychology 10)

Verified content

• [abstract] Reanalysis of studies meeting the original definition of deliberate or purposeful practice: practice explained 29% of performance variance, 61% after attenuation correction, vs 14% reported by Macnamara, Hambrick & Oswald.
• [full text] r = 0.54 (95% CI 0.44–0.63), k = 14 effects; games r = 0.50 (k = 5), music r = 0.71 (k = 3), sports r = 0.58 (k = 5), education one study (r = 0.31), professions none.
• [full text] Correction used assumed reliabilities of 0.6 (practice estimates) and 0.8 (performance).

Limits

• [assessment] Reanalysis by the theory's originator; few studies; the 61% depends on assumed reliabilities.

Added 2026-10-16 by the project (broadening attack run). [abstract] = from the published abstract; [full text] = read in the full text; [assessment] = the project's own assessment.