1: Lumberjacks.  

The researchers divided this ferociously independent group into teams. “Some teams were told to work smart and fast, but no pressure, do your best,” writes Steven Kotler in The Art of Impossible: A Peak Performance Primer.

“Others were given quotas. This much wood for a good week of work, this much wood for a great week,” he writes. “It’s important to note that there was zero financial … continue reading