In this paper spotlight episode, Rebekka Weidmann speaks with Michael Krämer about his recent publication in the Journal of Personality and Social Psychology, titled “What explains personality change intervention effects?”. Co-authored by Chris Hopwood, Travis Miller, and Wiebke Bleidorn, the paper summarized three studies that tested personality trait change interventions and compared them to acceptance interventions and examined whether they were driven by expectancy effects. Michael provides the theoretical background of the study, summarizes the findings, and provides ideas how these findings can be used for future research.