An intelligence quotient (IQ) is a total score derived from a set of standardized tests or subtests designed to assess human intelligence.\The abbreviation "IQ" was coined by the psychologist William Stern for the German term Intelligenzquotient, his term for a scoring method for intelligence tests at University of Breslau he advocated in a 1912 book. Historically, IQ was a score obtained by dividing a person's mental age score,source:wikipedia
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