Psychological science: the study of mind, brain, and behavior. Evolutionary theory: in psychological science, a theory that emphasizes the inherited, adaptive value of behavior, and mental activity throughout the entire history of a species. Natural selection: darwin"s theory that those who inherit characteristics that help them adapt to their particular environment have a selective advantage over those who do not. Adaptations: in evolutionary theory, the physical characteristics, skills, or abilities that increase the chances of reproduction or survival and are therefore likely to be passed along to future generations. Culture: the beliefs, values, rules, and customs that exist within a group of people who share a common language and environment, and that are transmitted through learning from one generation to the next. Nature-nurture debate: the arguments concerning whether psychological characteristics are biologically innate or acquired through education, experience, and culture.