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However, the overall population maintains the same average intelligence: moving a person of moderate intelligence out of a high-intelligence group and into a low-intelligence group increases the mean intelligence of both the low- and the high-intelligence groups, while the overall population mean (which is a weighted average of the two groups ...
Christopher Michael Langan (born March 25, 1952) is an American horse rancher and former bar bouncer, known for scoring highly on an IQ test that gained him entry to a high IQ society, and for being formerly listed in the Guinness Book of Records high IQ section under the pseudonym of Eric Hart, alongside Marilyn vos Savant and Keith Raniere ...
The average farm size was 328 acres (133 ha), significantly less than the average farm size in the U.S. of 444 acres (180 ha). [1] Because of its scale, and the naturally arid climate, the agricultural sector uses about 40 percent of California's water consumption. [2]
Youngest or middle siblings may beg to differ, but this study of 250,000 Norwegian 18- and 19-year-olds published in Science magazine revealed they had an average IQ 2.3 points higher than their ...
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With regard to the potential causes of these gaps, the authors stated that there was insufficient evidence at the time to make conclusions. [1] Today, the scientific consensus is that genetics does not explain observed differences in average IQ test performance between groups, and that these differences are environmental in origin. [3] [4] [5] [6]
A California businessman invested his savings in a pistachio farm. The return of Tulare Lake has left hundreds of his acres underwater. 'It's a disaster': California farmer faces ordeal as ...
Additional vitamin-mineral supplementation may have an effect also in the developed world. A study giving such supplementation to "working class", primarily Hispanic, 6–12-year-old children in the United States for 3 months found an average increase of 2 to 3 IQ points. Most of this can be explained by the very large increase of a subgroup of ...