Education: Tester

Mental testers define an individual's intelligence in many ways, usually as "the capacity for abstracting" or "the ability to meet new situations." One thing on which most agree, however, is that its quality or quantity does not change. Thirty years ago Professor Alfred Binet and a Sorbonne colleague, relying on this principle, devised the first widely used intelligence test. It consisted of a series of 54 questions, groups of which were to be given to children of various ages. The highest group a child could pass decided his mental age, which, when divided...

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