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The concepts of fluid intelligence ( gf) and crystallized intelligence ( gc) were introduced in 1963 by the psychologist Raymond Cattell. [1] [2] According to Cattell's psychometrically -based theory, general intelligence ( g) is subdivided into gf and gc. Fluid intelligence is the ability to solve novel reasoning problems and is correlated ...
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What tests measure intelligence?
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Is IQ testing a metric for human intelligence?
In most of the studies, intelligence quotient (IQ) tests were used to measure a subject's mental age, which was checked for possible correlation with height. [12] [13] While the use of IQ tests are highly debated among scientists as an accurate measurement of intelligence, they provide a quantitative and normal distribution to ...
The g loadings of IQ scores are high, but it is possible that some of the validity of IQ in predicting scholastic achievement is attributable to factors measured by IQ independent of g. According to research by Robert L. Thorndike , 80 to 90 percent of the predictable variance in scholastic performance is due to g , with the rest ...
In general, higher IQ scores are associated with better outcomes in life. However, while IQ test scores show a high degree of inter-test reliability, and predict certain forms of achievement effectively, their construct validity as a holistic measure of human
Eyferth study. The Eyferth study, conducted by German psychologist Klaus Eyferth, examined the IQs of white and racially-mixed children raised by single mothers in post- World War II West Germany.
Discussions of race and intelligence – specifically regarding claims of differences in intelligence along racial lines – have appeared in both popular science and academic research since the modern concept of race was first introduced. With the inception of IQ testing in the early 20th century, differences in average test performance between racial groups were observed, though these ...
