Marcial Losada (1939–2020) was a Chilean psychologist, consultant, and former director of the Center for Advanced Research (CFAR) in Ann Arbor, Michigan. He is known for his work in academia and business focusing on the development of "high performance teams", and having participated in partially retracted collaborative work with Barbara Fredrickson of the University of North Carolina, a retraction for which he has been assigned the culpability.