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Piaget's Stages of Intellectual Development
The Concrete Operational Stage
A significant change in thinking processes occurs at 7 years old.
Mental operations are powerful internal schema enabling logical thinking.
Reversibility the child's ability to perform reversible mental operations.
The child, however, can only think about concrete (real) objects and problems.
Conservation properties of objects aren't changed by different outward appearances.
Compensation features can compensate for each other
Serial ordering organising concrete objects in order
Transivity inferences made based on information already given
Class inclusion distinguishing between superordinate and subordinate classes