What is grit?  Angela Duckworth , a psychology professor at University of Pennsylvania’s School of Arts and Sciences, says it is the capacity to work hard and stay focused. In her recent book, Grit: The Power of Passion and Perseverance, she explains why grit is necessary in addition to talent, and why talent needs the drive that grit provides in order for one be successful. Duckworth, a 2013 MacArthur Fellow, discussed her ideas on the Knowledge at Wharton show on Wharton Business Radio on SiriusXM channel 111 . (Listen to the podcast at the top of this page.) An edited transcript of the conversation follows. Knowledge at Wharton: Could you talk about grit affecting our successes? Where did the idea have its genesis? Angela Duckworth: I could date it back to being a teacher, teaching math in the New York City public schools and seeing many kids.…