Final answer:
Dr. Anderson is a social psychologist, as the focus of her research is on behavioral changes that occur in social contexts.
Step-by-step explanation:
Dr. Anderson, who studies how we change our behavior to match that of other people, is best described as a social psychologist. Social psychology focuses on how individual behavior is influenced by social dynamics such as the presence of others, social norms, and social settings. Social psychologists explore various aspects of human behavior, including how individuals conform to group norms, how attitudes are formed and changed, and how social influences shape actions and beliefs.