Intellectual Development
In Piaget’s model of intellectual development, the fourth and final stage is the formal operational stage. In the classic book “The Growth of Logical Thinking from Childhood to Adolescence” by Jean Piaget and Barbel Inhelder formal operational reasoning takes many forms, including propositional reasoning, deductive logic, separation and control of variables, combinatorial reasoning, and proportional reasoning. Robert Karplus, a science educator in the 1960s and 1970s, investigated all these forms of reasoning in adolescents & adults. Mr. Tall-Mr.Short was one of his studies.
Read more about this topic: Proportional Reasoning
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