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Evidence of a general factor of intelligence has been observed in non-human animals. First described in humans, the g factor has since been identified in a number of non-human species. [45] Cognitive ability and intelligence cannot be measured using the same, largely verbally dependent, scales developed for humans.
The Cattell–Horn–Carroll theory is an integration of two previously established theoretical models of intelligence: the theory of fluid and crystallized intelligence (Gf-Gc) (Cattell, 1941; Horn 1965), and Carroll's three-stratum theory (1993), a hierarchical, three-stratum model of intelligence. Due to substantial similarities between the ...
Intelligence as measured by Psychometric tests has been found to be highly correlated with successful training and performance outcomes (e.g., adaptive performance), [76] [77] [78] and IQ/g is the single best predictor of successful job performance; however, some researchers although largely concurring with this finding have advised caution in ...
Terman believed his test measured the "general intelligence" construct advocated by Charles Spearman (1904). [ 55 ] [ 56 ] Terman differed from Binet in reporting scores on his test in the form of intelligence quotient ("mental age" divided by chronological age) scores after the 1912 suggestion of German psychologist William Stern .
However, these differences do not seem to impact overall Intelligence, implying that the same cognitive ability levels can be attained in different ways. [24] One specific methodology used to study grey matter correlates of intelligence in areas of the brain is known as voxel-based morphometry (VBM). VBM allows researchers to specify areas of ...
The report stated that IQ scores measure important skills as they correlate fairly well (0.5) with grades. This implied that the explained variance (given certain linear assumptions) is 25%. "Wherever it has been studied, children with high scores on tests of intelligence tend to learn more of what is taught in school than their lower-scoring ...
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.
IQ and Human Intelligence (second ed.). Oxford: Oxford University Press. ISBN 978-0-19-958559-5. The second edition of a leading textbook on human intelligence, used in highly selective universities throughout the English-speaking world, with extensive references to research literature. Hunt, Earl (2011). Human Intelligence. Cambridge ...