Psychology is defined as the scientific study of the mind and behavior, employing the scientific method to explore various psychological phenomena. Its history as an academic discipline began in the late 1800s, with foundational figures like Wilhelm Wundt, William James, and Sigmund Freud contributing to its development. Over time, psychology has evolved to encompass different perspectives such as behaviorism, humanism, and multicultural psychology, reflecting the complexity of human experience and social influence.