Sir Francis Galton British biologist has the subject of human genetic research. By realizing the need to measure all the biology related behavior is and is not related to each other as relatives. The difference and similarity between parents and their children, sister. Study on human body parts are recorded and the test subject to see and hear, muscle strength, and reaction response.James Galton's Cattle had to study about quick wit, intelligence, the capabilities are measured on the basis on the nervous system. Hermann Ebbinghaus, German psychologists have developed math and take the sentence completion tests with students. Alfred Binet psychologists nationals of France Learn about why children learn slowly, in collaboration with Theodore Simon developed the Binet tests through intelligence (Test of Intelligence), which consists of 30 questions deals used to measure the ability to make decisions, understanding and reasoning this test has also been developed by Lewis Terman, American psychologists. On the concept of IQ (Intelligence Quotient), which has been updated several times, until it was widely applied.
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