By definition, personality traits are relatively stable, but recent research has begun to investigate whether individuals can intentionally change their personalities. One intervention that might lead to personality change relies on the use of digital applications to coach people on achieving their desired personality change. Allemand and Flückiger provided a rationale for nonclinical personality-change interventions, noting that personality traits predict several life outcomes, personality change can lead to better health, and many studies have already indicated that personality traits are malleable.   Robert Goldstone of the Percepts and Concepts Laboratory at Indiana University and editor of the APS journal Current Directions in Psychological Science interviews Mathias Allemand, Professor in the Department of Psychology at University of Zurich in Switzerland.