If tutors really do reliably produce two-sigma learning gains, then why aren't most top achievers the product of tutors? Yes, they're expensive, but perhaps "only" 2-3x private school; there are a lot of wealthy parents. Diminishing returns for high achievers?
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Interestingly, most (all?) top achievers in athletics and conservatory music are tutored. Why is this not true of most fields? Is it that music/athletics have so much more tacit knowledge? Or by contrast is so much more legible, so that a tutor/coach can be much more effective?
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How do you define "top achiever" in your original question? It doesn't feel coincidental that the relative narrowness of music/athletics makes the definition legible
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Really I'd accept almost anyone's definition. Just your intuition for highly successful or creative individuals.
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I think that's my point – two-sigma differences are measured using simple assessments. There is no reason they should translate to complex reality, excepting fields where success is highly legible.
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