The document discusses how psychology influences curriculum development in several ways. It describes various psychological theories that provide a basis for curriculum, including behaviorism, cognitive development theories, and humanistic theories. Factors like the age, mental and physical development, interests, and needs of learners are discussed as influencing curriculum. The document also examines different learning theories and how they guide curriculum content and experiences. Overall, psychology is positioned as playing a vital role in curriculum development by providing concepts and theories that shape how learning and learners are understood.