Robert Zajonc, Polish-American psychologist and author (born 1923)

Robert Bolesław Zajonc was an American social psychologist who is known for his decades of work on a wide range of social and cognitive processes. One of his most important contributions to social psychology is the mere-exposure effect. Zajonc also conducted research in the areas of social facilitation, and theories of emotion, such as the affective neuroscience hypothesis.