Greg Siegle, a psychologist at the University of Pittsburgh, sits down with Yale's June Gruber for this entry in the Experts in Emotion series to discuss how researchers provoke and measure emotional states in the lab. Siegle traces what drew him into emotion research, then spends the bulk of the interview on his core findings, covering roughly seventeen minutes of the run time, before turning to where he thinks the field is headed and closing with advice for students considering the area. The format is a seated one-on-one interview rather than a classroom lecture, filmed for Yale's broadcasting unit, but the content is substantive: Siegle speaks in detail about elicitation techniques and what they reveal about emotional processing. It works as a compact overview of one working scientist's research program and the questions still open in the study of emotion.