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Christopher Langan. Christopher Michael Langan (born March 25, 1952) is an American horse rancher and autodidact who has been reported to score very highly on IQ tests. [1] Langan's IQ was estimated on ABC's 20/20 to be between 195 and 210, [2] and in 1999 he was described by some journalists as "the smartest man in America" or "in the world".
An intelligence quotient ( IQ) is a total score derived from a set of standardised tests or subtests designed to assess human intelligence. [1] 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 ...
Some argue that these findings indicate that test bias plays a role in producing the gaps in IQ test scores. Both of these tests demonstrate how cultural content on intelligence tests may lead to culturally biased score results. Still, these criticisms of cultural content may not apply to "culture free" tests of intelligence.
The Triple Nine Society ( TNS) is an international high-IQ society for adults whose score on a standardized test demonstrates an IQ at or above the 99.9th percentile of the human population. [2] [3] [4] The society recognizes scores from over 20 intelligence and academic aptitude tests. [5] TNS was founded in 1978 and, since 2010, is a non ...
Raven's Progressive Matrices (often referred to simply as Raven's Matrices) or RPM is a non-verbal test typically used to measure general human intelligence and abstract reasoning and is regarded as a non-verbal estimate of fluid intelligence. [1] It is one of the most common tests administered to both groups and individuals ranging from 5-year ...
IQ classification. Score distribution chart for sample of 905 children tested on 1916 Stanford–Binet Test. IQ classification is the practice of categorizing human intelligence, as measured by intelligence quotient (IQ) tests, into categories such as "superior" or "average". [1] [2] [3] [4]
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