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Intelligence quotient (IQ) tests do correlate with one another and that the view that the general intelligence factor (g) is a statistical artifact is a minority one. IQ scores are fairly stable during development in the sense that while a child's reasoning ability increases, the child's relative ranking in comparison to that of other ...
Free Press was an American independent book publisher that later became an imprint of Simon & Schuster. It was one of the best-known publishers specializing in serious nonfiction, including path-breaking sociology books of the 1950s, 1960s and 1970s.
A more egregious example is provided by his treatment of the Eyferth (1961) study of two groups of illegitimate children fathered by (mostly) American black and white servicemen and brought up by their (carefully matched) German mothers. Eyferth reported an average IQ of 96.5 for the mixed race children and of 97.2 for the whites.
According to a press release, in studying intelligence testing data from 2006 to 2018, Northwestern University researchers noticed that test scores in three out of four “cognitive domains ...
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 ...
For comparison, the average IQ is around 100. ... American psychologist Lewis Terman wrote that Mexicans, African-Americans and Native Americans had a mental “dullness” that he claimed was ...
The 1981 article "Average IQ values in various European countries" by Vinko Buj is the only international IQ study that over a short time period has compared IQs using the same IQ test. Rindermann (2007) states that it is of dubious quality with scant information regarding how it was done. [3] [4]
For a 2006 study, scientists gave roughly 2,200 adults intelligence tests over a five-year period and results suggested that the bigger the waistline, the lower the cognitive ability.