The Great Practice Myth: Debunking The 10000 Hour Rule

Of course, genetics play a role as well. A lot of the best research on the role of genetics in acquiring certain abilities comes from studying – you guessed it – twins. Psychologist Robert Plomin led research at King’s College London that found more than 15,000 twins in the United Kingdom and had them perform a series of tests and fill out questionnaires – and some of the findings are quite remarkable. Identical twins’ drawing ability was much more highly correlated than fraternal twins’ drawing ability. Since identical twins share 100% of their genes, whereas fraternal twins share only 50%, these findings indicate that differences between people in basic artistic ability is at least in part due to genetics. Using the same data set, over half the variation between skilled and less skilled readers was found to be due to genetics. Another series of studies, led by psychologist Miriam Mosing of the Karolinska Institute in Sweden, tested more than 10,000 twins on their basic music abilities, like whether two melodies carry the same rhythm, in relation to how much they have practiced music. What they found is that while genes influenced 38% of the musical abilities they measured, no evidence was found that the amount of practice influenced those abilities. That is to say, an identical twin who practiced music regularly was not any more likely to be good at these abilities than the identical twin who did not practice. This doesn’t mean there’s no point in practicing music. There are certainly music skills that you can improve with practice, like reading music and playing a keyboard. But it does indicate that there are limits to the power of practice. Not everyone could become an expert violinist even with 10,000 hours of practice – and I think I am one of those. There is some innate ability necessary to become a master in a field.

Malcolm Gladwell got one thing right, without a doubt: it takes many years of concerted effort and practice to become a true expert in a field. But while the time spent practicing is important, it is far from the only factor. Your genetic makeup, when you start, and how you learn all combine to determine how many hours it would take you to master a specific craft – or if “mastery” is possible at all.

Consider the research of master chess players by those cognitive psychologists, Fernand Gobet and Guillermo Campitelli. They found that there were actually huge differences in the number of hours of practice it took chess players to reach a specific skill level. The number of hours to reach “master” status ranged from 728 hours to 16,120 – meaning some players needed 22x more practice hours than others to reach the same skill level. The 10,000 hour rule is a myth.

Let’s rename it the 728 to 16,120 Hour Rule.