Examlex
NREM sleep is characterized by:
Preoperational Stage
The Preoperational Stage is the second stage in Piaget's theory of cognitive development, where children ages 2 to 7 begin to engage in symbolic play but lack the ability to perform operations or think logically.
Concrete Operational
A stage in Piaget's theory of cognitive development where children from about 7 to 12 years old develop logical thinking but still struggle with abstract concepts.
Formal Operational
The stage of cognitive development proposed by Piaget where individuals gain the ability to think abstractly and reason logically.
Reversibility
A concept in cognitive development referring to the ability to follow a line of reasoning back to its original starting point.
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