chose to do challenge themselves. Then the researchers gave a hard puzzle to all of the kids because they were interested in seeing what confronting difficulty would do to their performance. Look at what happened when the kids later went back to the set of easier problems that they started with. The kids who received the fixed mindset praise did significantly worse than they had originally, while those who received a growth mindset praise did better. And to top it off, at they very end, kids were asked to report their scores;