Daniel Gilbert, professor of psychology at Harvard, discusses his research on happiness in this interview from Yale's Experts in Emotion series, directed by June Gruber. Gilbert explains what drew him to studying emotion, then walks through the central findings of his work, including his studies on affective forecasting, the way people mispredict what will make them happy, and how the mind adapts to both good and bad circumstances. He speaks about where he sees the study of emotion heading next and closes with advice for students considering a career in the field. The format is a straightforward seated interview with chapter markers, running about 28 minutes, with Gilbert doing most of the talking about his own research trajectory rather than delivering a formal lecture. It gives a condensed, personal account of decades of work on why people are often bad judges of their own future feelings.