The document discusses several psychological perspectives that influence curriculum development, including behaviorism, cognitivism, constructivism, and humanism. It provides overview of major theorists like Pavlov, Thorndike, Piaget, and Rogers, and explains their core concepts such as stimulus-response theory, information processing, knowledge construction, and the importance of emotions and learner-centered approach. A curriculum developer should have knowledge of learning psychology to understand how students learn and design effective instruction based on cognitive and affective factors.