Dan Ariely Challenges Students to a Puzzle and Pizza or $1

Duke professor Dan Ariely set up shop Sunday in "The Perk" at the library to runs a demonstration of his new book, "Payoff: The Hidden Logic That Shapes Our Motivations." The book reveals insights into motivation and what drives people -- how it works and how we can use this knowledge to approach important choices in our own lives.

In this Facebook Live, Ariely is asking students to participate in solving a puzzle for money ... or pizza, demonstrating the complexity of what motivates people.