What’s the best predictor of success in a person’s life, including when it comes to goals in education? “Grit,” says psychologist Dr. Angela Lee Duckworth. What is grit? Find out in her TED Talk, in which Duckworth explains that grit is a better indicator of personal success than IQ, family income and other factors. Duckworth is an assistant professor of psychology at the University of Pennsylvania. Angela studies non-IQ competencies, including self-control and grit, that predict success both academically and professionally.