Examlex
Diminishing marginal returns means that as you combine more units of a variable resource with a set of fixed resources:
Egocentrism
Egocentrism is the inability to differentiate between one's own perspective and someone else's perspective, often observed in young children.
Preoperational
A stage in Piaget's theory of cognitive development where children between ages 2 and 7 begin to engage in symbolic play but lack the ability of operational thought.
Concrete Operational
A stage in Jean Piaget's theory of cognitive development during which children gain the abilities of conservation (understanding that quantities remain the same despite changes in shape or appearance) and logical thought about physical objects and their properties.
Assimilation
A cognitive process in Piaget's theory where individuals integrate new information into preexisting knowledge frameworks.
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