"'There was this eureka moment,' says Dweck. She now identifies the former group as people with a 'fixed mind-set,' while the latter group has a 'growth mind-set.' Whether you are more fixed or more of a grower helps determine how you react to anything that tests your intellectual abilities. For growth people, challenges are an opportunity to deepen their talents, but for 'fixed' people, they are just a dipstick that measures how high your ability level is. Finding out that you’re not as good as you thought is not an opportunity to improve; it’s a signal that you should maybe look into a less demanding career, like mopping floors."

— Megan McArdle