Robert C. McCrae is a prominent psychologist known for his work in personality psychology. He is best recognized for developing the Five Factor Model of personality, which identifies five key traits: openness, conscientiousness, extraversion, agreeableness, and neuroticism. This model has significantly influenced how researchers and practitioners understand human behavior and personality assessment. McCrae has authored numerous publications and collaborated with other psychologists, including Paul T. Costa Jr., to further explore the implications of personality traits in various contexts. His research has contributed to fields such as psychology, mental health, and human development, making him a key figure in understanding personality dynamics.