Examlex
Homo erectus appeared in the fossil record about ________ years ago.
Piagetian Theory
A theory of cognitive development proposed by Jean Piaget, outlining how children progress through distinct stages of intellectual growth.
Intellectual Development
The growth and change in cognitive abilities, including memory, problem-solving skills, decision-making, and the capacity to understand complex concepts, over a person’s lifetime.
Object Permanence
The understanding that objects continue to exist even when they cannot be seen, heard, touched, or sensed in any way.
Number Conservation
The understanding that the quantity of a set of items is unchanged even when its appearance is altered, a concept developed in childhood.
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