The document provides an overview of the field of psychology, outlining its objectives to understand human behavior through scientific study, historical foundations dating back to Aristotle, and major theories and figures that have shaped the development of the field such as Wilhelm Wundt, Sigmund Freud, and behavioralism. It also describes the scientific methods used in psychology like the experimental and correlational methods as well as subfields that apply psychological principles like developmental, social, and clinical psychology.