Barbara FredricksonDr. Barbara Fredrickson is a Kenan Distinguished Professor of Psychology at the University of North Carolina and is considered one of the world's leading authorities on positive psychology. She is best known for her "Broaden-and-Build" theory of posiive emotions. The bestselling author of Positivity, Love 2.0, and more than 130 peer-reviewed articles, she was honored with the 2017 Tang Prize for Achievements in Psychology. Read More Read Less