The document discusses cognitive development and cognitive dysfunction. It covers major theorists in cognitive development like Piaget, Vygotsky, and Bruner. It outlines typical signs of cognitive development from infancy through adolescence. It then discusses cognitive dysfunction, including potential causes like neurological disorders, injuries, and medications. Common symptoms are described such as memory issues and problems with problem-solving. The document concludes by covering intervention strategies for cognitive dysfunction, including medical management, rehabilitation therapies, and lifestyle changes.