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Wechsler believed that "mental age norms clearly did not apply to adults." [6] Wechsler criticized the then existing Binet scale because "it did not consider that intellectual performance could deteriorate as a person grew older." [6] These criticisms of the 1937 Binet test helped produce the Wechsler–Bellevue scale, released in 1939.
IQ tests generally are reliable enough that most people 10 years of age and older have similar IQ scores throughout life. [14] Still, some individuals score very differently when taking the same test at different times or when taking more than one kind of IQ test at the same age. [15]
The cover of a test booklet for Raven's Standard Progressive Matrices. 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]
The Woodcock–Johnson Tests of Cognitive Abilities is a set of intelligence tests first developed in 1977 by Richard Woodcock and Mary E. Bonner Johnson (although Johnson's contribution is disputed). [1] It was revised in 1989, again in 2001, and most recently in 2014; this last version is commonly referred to as the WJ IV. [2]
An intelligence quotient (IQ) is a total score derived from a set of standardized tests or subtests designed to assess human intelligence. [1] Originally, IQ was a score obtained by dividing a person's mental age score, obtained by administering an intelligence test, by the person's chronological age, both expressed in terms of years and months.
A review examined whether hold tests, best estimate or regression equation methods were most accurate in predicting overall IQ (full scale IQ) as determined by Wechsler Adult Intelligence Scale (WAIS-R) in a non-neurologically impaired population. It was found that different methods were more accurate depending on the IQ level of participants e ...
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