Psychological Review. In this paper, she presents a new theory about how personality is formed and how both nature and nurture play a role in this. The interesting thing about this theory is that it both establishes connections between old and new theories within psychology and that is brings together separate psychological disciplines. Social psychologists have often been criticized for paying too little attention to theory building and for merely developing fragmentary knowledge. Dweck now comes up with a strong answer to these criticisms in the form of a broad theory which may turn out to explain a broad range of psychological phenomena. This type of theorizing is not only important for social scientists but also for practitioners for whom psychological knowledge is relevant (and who is really excluded from this group?). Good theory can help practitioners deal with problems in more informed, systematic and integrated ways. Below, I will explain what the theory is. Then, I will say a bit more about some of the main parts of the theory.