Which of the following is a theorist associated with cognitive development in children?

The correct answer is Piaget, who is a prominent theorist associated with cognitive development in children. Jean Piaget developed a comprehensive theory outlining how children's thinking evolves through distinct stages as they interact with their environment. He identified four major stages: the sensorimotor stage, preoperational stage, concrete operational stage, and formal operational stage. Each stage represents different capabilities in reasoning and understanding the world around them, emphasizing the active involvement of children in their own learning processes.

This focus on cognitive development distinguishes Piaget's work from that of others. For example, B.F. Skinner is known primarily for his work in behaviorism and the principles of operant conditioning, while Carl Rogers is associated with humanistic psychology and the development of self-concept and personal growth. Erik Erikson, on the other hand, is known for his psychosocial development theory, which emphasizes social and emotional development across the lifespan rather than cognitive processes specifically. Thus, Piaget stands out as the theorist particularly focused on how children develop cognitive abilities.