Examlex
What are the three most commonly used drugs (in descending order)by American adolescents?
Concrete Operational
A stage in Piaget's theory of cognitive development where children gain the ability to think logically about concrete events.
Preoperational
A stage in Piaget's theory of cognitive development, occurring roughly between the ages of 2 and 7, characterized by an increase in symbolic play and egocentrism but a lack of logical operations.
Theory of Mind
The ability to attribute mental states—beliefs, intents, desires, emotions—to oneself and others and to understand that others have beliefs and perspectives different from one's own.
Conservation
The principle that certain properties such as mass, volume, and number remain the same despite changes in the forms of objects, understanding of which is a key development in early childhood cognition.
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