Barbara Fredrickson, professor at the University of North Carolina, Chapel Hill, talks with Yale's June Gruber about her research on positive emotion in this installment of the Experts in Emotion interview series. Fredrickson describes what drew her to studying emotion early in her career and walks through the central findings of her work, including ideas connected to her broaden-and-build theory of how positive states expand thinking and build lasting resources over time. She then turns to what she considers the most promising open questions in the field and closes with practical advice for students who want to pursue emotion research. The format is a structured one-on-one conversation, broken into clear chapters covering her background, her core discoveries, future directions, and advice, rather than a classroom lecture, but it covers real research content in some depth over about twenty minutes.