Validity of the marshmallow test

How important is grit relative to talent? Can grit be taught? Angela Duckworth of the University of Pennsylvania and author of Grit: The Power of Passion and Perseverance talks with with EconTalk host Russ Roberts about the nature of success in work, play and life. How much does grit matter? Is grit malleable or something we're born with? Duckworth discusses her research on these questions and how to think about what it means for a child and an adult to thrive.