Carol Dweck is a leading researcher in psychology who studies personality, social psychology, and developmental psychology. Her work shows that people can hold one of two mindsets: a fixed mindset, where they believe their qualities are carved in stone, or a growth mindset, where they believe their qualities can be developed through effort. Which mindset people hold has profound effects on their motivation and how they approach challenges. Dweck's research with children who enjoyed challenges changed her view that failure meant lack of ability, and instead showed the power of believing that ability can be cultivated through learning.