Sixteen rigorous studies of thousands of people at work have shown that people’s coworkers are better than they are at recognizing how their personality will affect their job performance. As a social scientist, if I want to get a read on your personality, I could ask you to fill out a survey on how stable, dependable, friendly, outgoing, and curious you are. But I would be much better off asking your coworkers to rate you on those same traits: They’re often more than twice as accurate. They can see things that you can’t or won’t—and these studies reveal that whatever you know about yourself that your coworkers don’t is basically irrelevant to your job performance.
Adam Grant writing in the Atlantic