Examlex
Find the centroid of the portion of the unit circle lying within the first three quadrants.
Conservation
The principle in cognitive development that certain properties of an object, such as volume or mass, remain the same despite changes in its form or arrangement.
Centration
A cognitive limitation in early childhood where a child focuses on one aspect of a situation or object, neglecting other relevant aspects.
Object Permanence
The understanding that objects continue to exist even when they cannot be seen, heard, or touched.
Preoperational Stage
A phase in Piaget's theory of cognitive development (ages 2-7) where children begin to engage in symbolic play but lack the ability to perform operations or use logic.
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