Iris Mauss, a psychologist at UC Berkeley, talks with June Gruber of Yale University about how researchers measure emotion. Mauss describes what drew her to the study of emotion and walks through core findings from her research, including work on emotion regulation and the surprising costs of pursuing happiness too directly. The conversation, structured as an interview with clear chapter markers, moves from her early influences through roughly twenty minutes of discussion on her central discoveries before turning to open questions she considers most promising for future research. She closes with practical advice for students or early researchers interested in entering the field of emotion science. The format is informal but substantive, aimed at giving viewers a sense of how an active researcher thinks about her subject rather than delivering a polished formal lecture.