Good study. The phenomenon is also well documented and explained in George Leonard's book Mastery: https://www.amazon.com/Mastery-Keys-Success-Long-Term-Fulfil

Good study. The phenomenon is also well documented and explained in George Leonard's book Mastery: https://www.amazon.com/Mastery-Keys-Success-Long-Term-Fulfillment/dp/0452267560 https://www.amazon.com/Mastery-Keys-Success-Long-Term-Fulfil... James Clear has a nice summary here: https://jamesclear.com/book-summaries/mastery https://jamesclear.com/book-summaries/mastery