Examlex
Nonprobability sampling methods are often used ______.
Object Permanence
The understanding that objects continue to exist even when they cannot be observed or are out of sight, a concept important in cognitive development.
Conservation of Mass
A principle stating that mass is neither created nor destroyed in a closed system through physical and chemical changes.
Conservation of Volume
The understanding that the quantity of a substance remains the same despite changes in its shape or container.
Object Permanence
The understanding that objects continue to exist even when they cannot be seen, heard, or touched, typically developed during early infancy.
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