10000 Hours to Genius

The amount of time of dedicated, focused practice that is a requirement to become a genius at anything. Now the question whether genius requires talent to begin with - still appears to be open.

Can 10,000 hours of practice make a genius - out of anyone?

https://www.zdnet.com/article/can-10000-hours-of-practice-make-a-genius/

But - Dan quit after 6000 hours.

https://www.theatlantic.com/health/archive/2017/08/the-dan-plan/536592/

Dan's start: “The idea of talent is [like] living in a society of kings and princes,” he says. “If you don’t limit yourself by this idea ... it’s more like a democracy where anyone who’s willing to work [can] succeed.”

Also: “People’s intuitions about practice are nowhere near optimal,” says Robert Bjork, a professor in cognitive psychology at the University of California, Los Angeles, whose research has demonstrated the effectiveness of introducing “deliberate difficulty” into practice—for instance:

• constant variety
• “interleaving” between different skills - Interleaving is a learning technique that involves mixing together different topics or forms of practice, in order to facilitate learning. Interleaving helps people retain new information, acquire new skills, and improve existing abilities in a wide range of domains, such as math, music, and sports. [1]
• “spacing” study to force students to retrieve, and embed, new knowledge between sessions. [2]

Links

• Learning How to Learn

MJ notes - it seems that 10000 is not enough. It must be accompanied by clear purpose.