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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 ...
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 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 ...
The Bell Curve: Intelligence and Class Structure in American Life is a 1994 book by the psychologist Richard J. Herrnstein and the political scientist Charles Murray in which the authors argue that human intelligence is substantially influenced by both inherited and environmental factors and that it is a better predictor of many personal outcomes, including financial income, job performance ...
Even before IQ tests were invented, there were attempts to classify people into intelligence categories by observing their behavior in daily life. [10] [11] Those other forms of behavioral observation were historically important for validating classifications based primarily on IQ test scores. Some early intelligence classifications by IQ ...
Studies have found cortical thickness to explain 5% in the variance of intelligence among individuals. [21] In a study conducted to find associations between cortical thickness and general intelligence between different groups of people, sex did not play a role in intelligence. [37]
He argues that substantial correlations between intelligence test scores and measures of well-being exist when the analysis is limited to developed countries, where the IQ results are more likely to be accurate. [5] According to Hunt, such studies are important because they measure the cognitive skills necessary to excel in a post-industrial world.
IQ tests are valid measurements of a real human ability—what people generally describe as "intelligence"—that is important to many parts of contemporary life. Intelligence, as measured by IQ tests, is about 80 percent heritable. Intelligent parents are much more likely to have intelligent children than other parents.