Chapter 7: cognitive development 1 - piaget and vygotsky. Piaget founded the discipline we know today as cognitive development. His interest in children s thinking ensured that this eld would be developmental and would not merely apply to children the ideas and methods from the study of adult thinking: 2. Piaget convinced us that children are active explorers who play an important role in their own development: 3. Piaget s theory was one of the rst to explain and not just describe the process of development: 4. Piaget s description of broad sequences of intellectual development provides a reasonably accurate overview of how children of different ages think: 5. Piaget s ideas have had a major in uence on thinking about social and emotional development as well as many practical implications for educators: 6. Piaget asked important questions and drew literally thousands of researchers to the study of cognitive development.