Problem: Define introspection and explain how it was used in structuralism. Define natural selection and explain how it influenced functionalism. Outline the basic ideas behind Freud's psychoanalytic strategy. Define the basic ideas behind behaviorism. Explain what cognitive psychology is and how it emerged. Explain what evolutionary psychology is and why it emerged. Define neuroscience and explain how modern psychologists study the brain. Define cultural psychology and explain why it matters. Describe the diversity of psychology.