Warren Norman (psychologist)

Warren T. Norman (1930–1998) was a psychologist recognized for his research on personality psychology, particularly in establishing the Five-Factor Model (FFM), also known as Norman's "Big 5". These dimensions, extraversion, agreeableness, conscientiousness, neuroticism, and openness to experience, are foundational aspects of contemporary personality theory. He was the Head of the Department of Psychology at the University of Michigan and worked there for thirty seven years.