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David Marks (2010) argues that differences in average IQ scores between national groups and across time periods can be fully accounted for by differences in literacy levels, and that "IQ distributions will converge if opportunities are equalized for different population groups to achieve the same high level of literacy skills." [23]
More recent research attempting to identify genetic loci associated with individual-level differences in IQ has yielded promising results, which led the editorial board of Nature to issue a statement differentiating this research from the "racist" pseudoscience which it acknowledged has dogged intelligence research since its inception. [151]
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The debate concerns possible explanations of group differences encountered in the study of race and intelligence. Since the beginning of IQ testing around the time of World War I there have been observed differences between average scores of different population groups, though these differences have fluctuated and in many cases steadily ...
English: National IQ scores as estimated by Lynn and Vanhanen in their book IQ and Global Inequality. Compared to the previous, PNG version, this SVG version has a consistent legend (one bucket is missing it the PNG version). Adjustments: data for South Sudan are from Sudan and data for Montenegro are from Serbia. Data used for generating the map:
Re-analysis, and subsequent studies, have established that general mental ability (IQ) predicts job performance across all jobs. [9] The validity of IQ varies most notably with job complexity: IQ matters little for simple jobs such as packing, and a great deal in complex jobs such as medicine. These findings have major significance.
The IQ figures are based on 3 different studies for 17 nations, two studies for 30 nations, and one study for 34 nations. There were actual tests for IQ in the case of 81 countries out of the 185 countries studied. For 104 nations there were no IQ studies at all and IQ was estimated based on the average IQ of surrounding nations. [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.