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When a good is nonexcludable,
Urie Bronfenbrenner
A developmental psychologist known for introducing the ecological systems theory to explain how the inherent qualities of a child and their environment interact to influence development.
Lev Vygotsky
was a Russian psychologist known for his work on cognitive development, particularly the concept of the Zone of Proximal Development and the importance of sociocultural influences.
Jean Piaget
Jean Piaget was a Swiss developmental psychologist known for his theory of cognitive development that describes how children construct a mental model of the world.
Nature-Nurture Controversy
The ongoing debate over the relative contributions of genetic inheritance and environmental factors to human development and behavior.
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