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Binet started to develop a test to identify children with special needs in school. The test was the IQ test
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Lewis Terman adapted Binet's tests to numerically measure inherited intelligence
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Thurstone's primary mental abilities breaks intelligence into seven factors.
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Spearman's theory of general intelligence that basic intelligence predicts our abilities in varied academic areas
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David Weschsler created the most widely used intelligence test which consists of 11 subtests
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Evert Franklin Lindquest performed the first ACT test which is a standardized test for High School Achievment.
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Raymond Catell created Fluid and Crystallised Intelligence which suggested that there are two components of "g" that being fluid and crystallised.
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Guiliford disagreed with the idea of "g" and suggested that intelligence has 180 elementary ablities divided into three sectors
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Howard Gardner has theory that humas have multiple intelligences
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Robert Sternberg's theory of three intelligences including analytical, creative, and practical