Carol S. Dweck is an American psychologist known for her research on motivation, personality, and development. She is a professor at Stanford University and has authored several influential books, including "Mindset: The New Psychology of Success." Her work primarily focuses on the concept of "mindsets," which are the beliefs people hold about their abilities and potential. Dweck distinguishes between two main types of mindsets: a fixed mindset and a growth mindset. A fixed mindset believes that abilities are static, while a growth mindset embraces the idea that skills can be developed through effort and learning. This research has significant implications for education, business, and personal development.