Roger is shown two piles of sand and says that each pile has the same amount. However, when one pile is flattened with a shovel, he now claims emphatically, 'The flat pile has less sand.' Based on this information, Roger is probably in Piaget’s _______ stage of development.

Cognitive development is the long-term changes in thinking and memory processes. Here are some theories related to cognitive development: Jean Piaget: Piaget's theory of cognitive development is one of the most well-known perspectives on the subject. Piaget's theory is made up of three components: Schemas: Building blocks that help us understand and interpret the world The three processes of adaptation: Assimilation, accommodation, and equilibration The four stages of cognitive development: Sensorimotor, preoperational, concrete operational, and formal operational Cognitive learning... Show more

Cognitive development is the long-term changes in thinking and memory processes.

Here are some theories related to cognitive development:
Jean Piaget: Piaget's theory of cognitive development is one of the most well-known perspectives on the subject. Piaget's theory is made up of three components:
Schemas: Building blocks that help us understand and interpret the world
The three processes of adaptation: Assimilation, accommodation, and equilibration
The four stages of cognitive development: Sensorimotor, preoperational, concrete operational, and formal operational

Cognitive learning theory: This theory focuses on internal mental structures and processes. It helps learners connect existing knowledge with new materials, leading to deeper insights.
Modern cognitive development theory: This theory emphasizes relationships, seeing social interaction as the crucible in which children's cognitive development takes place.
Lev Vygotsky's Theory of Child Development: This theory states that a child's cognitive development and learning ability can be guided and mediated by their social interactions. 

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