The issue is not settled, but strong arguments are presented for the idea that IQ tests primarily measure levels of learning, what knowledge individuals already possess, rather than their potential to learn. 16 Child Development Cognitive development is perhaps the most significant aspect of child psychology. Consequently, for this lesson, the television program is devoted almost entirely to cognitive development. The program focuses on the extremely influence theories of Jean Piaget. His concept of stages of cognitive development is described and explained, with dramatic demonstrations of children's cognitive skills at different stages.
Several experts discuss how children's ability to think, reason, remember, and use language develop.
They comment on the value of Piaget's theories, acknowledging his impact on the field of child psychology, recognizing his lasting contributions, and identifying aspects of his work that subsequent research has called into question. The video lesson also demonstrates that cognitive development is influenced by cultural factors and that it depends on emotion and social interaction. Together, the three programs provide a memorable introduction to the subject of human development and to the important theories about the changes individuals experience from conception to death. This program features the special problems and challenges of adult development. Among the people who appear in the program is Norman Cousins, who had successfully struggled against cancer, demonstrating to many that one's mind and spirit might play a role in helping the immune system fight disease.