Examlex
Why is the Social Security system in crisis at a time when it's running large surpluses? What's the source of the problem? What solutions have been proposed?
Piaget's Theory
A theory of cognitive development that describes how children's intellectual abilities evolve through four stages from infancy to adolescence.
Vygotsky's Theory
A theory that emphasizes the fundamental role of social interaction in the development of cognition, suggesting that community and culture play central roles in the process of making meaning.
Cognitive Development
The process by which a person's ability to think, reason, and understand the world around them evolves over time.
Preoperational Stage
A developmental phase in Piagetian theory, where children from about 2 to 7 years old develop memory and imagination, but do not yet think logically.
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