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Concrete-Operational Stage
A stage in Piaget's theory of cognitive development where children, usually aged 7 to 12, develop logical thinking but are not yet capable of abstract thought.
Preoperational Stage
The second Piagetian developmental stage, which lasts from about 2 to 7 years of age, when children begin to represent the world with words, images, and drawings.
Formal-Operational Stage
A developmental stage proposed by Piaget, where individuals (around age 11 and older) gain the ability to think abstractly and logically.
Primitive Symbols
Basic or rudimentary forms of representation used to convey meanings or concepts without the use of words.
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