“Whether you think you can or think you can’t—you’re right,” said Henry Ford. A new study, to be published in an upcoming issue of Psychological Science, a journal of the Association for Psychological Science, finds that people who think they can learn from their mistakes have a different brain reaction to mistakes than people who think intelligence is fixed. “One big difference between people who think intelligence is malleable and those who think intelligence is fixed is how they respond to mistakes,” says Jason S. Moser, of Michigan State University, who collaborated on the new study with Hans S. Schroder,...