Which of the following is NOT one of Piaget's stages of cognitive development?

Piaget's theory of cognitive development is comprised of four distinct stages: sensorimotor, preoperational, concrete operational, and formal operational. Each of these stages represents a different level of cognitive growth in children, focusing on the ways they understand the world around them.

The preoperational stage involves the development of language and symbolic thinking but is marked by egocentrism and a lack of logical reasoning. The concrete operational stage is where children begin to think logically about concrete events but struggle with abstract concepts. The formal operational stage involves the ability to think abstractly, reason logically, and use deductive reasoning.

The choice that is not one of Piaget's stages is behaviorist, as it refers to a different psychological framework that focuses on observable behaviors rather than internal cognitive processes. Behaviorism emphasizes the role of environmental factors and reinforcement in shaping behavior, contrasting sharply with Piaget's focus on stages of cognitive development. Understanding these various frameworks is crucial, as they highlight different perspectives on child development and learning processes.