In moral-ethical realm, the child is not able to show principles underlying best behavior. Evidence for organized, logical thought. There is the ability to perform multiple classification tasks, order objects in a logical sequence, and comprehend the principle of conservation. The child is capable of concrete problem-solving. Class logic-finding bases to sort unlike objects into logical groups where previously it was on superficial perceived attribute such as color.
Thought becomes more abstract, incorporating the principles of formal logic.
The ability to generate abstract propositions, multiple hypotheses and their possible outcomes is evident. Thinking becomes less tied to concrete reality. Formal logical systems can be acquired. Can handle proportions, algebraic manipulation, other purely abstract processes. Can use aids such as axioms to transcend human limits on comprehension.