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西方社会自1970年之后智商开始下降

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发表于 2018-6-13 20:22 | 显示全部楼层 |阅读模式
 楼主| 发表于 2018-6-13 20:23 | 显示全部楼层
https://m.medicalxpress.com/news/2018-06-iq-scores-1970s.html

Bernt Bratsberg et al. Flynn effect and its reversal are both environmentally caused, Proceedings of the National Academy of Sciences (2018). DOI: 10.1073/pnas.1718793115

Abstract
Population intelligence quotients increased throughout the 20th century—a phenomenon known as the Flynn effect—although recent years have seen a slowdown or reversal of this trend in several countries. To distinguish between the large set of proposed explanations, we categorize hypothesized causal factors by whether they accommodate the existence of within-family Flynn effects. Using administrative register data and cognitive ability scores from military conscription data covering three decades of Norwegian birth cohorts (1962–1991), we show that the observed Flynn effect, its turning point, and subsequent decline can all be fully recovered from within-family variation. The analysis controls for all factors shared by siblings and finds no evidence for prominent causal hypotheses of the decline implicating genes and environmental factors that vary between, but not within, families.
 楼主| 发表于 2018-6-13 20:24 | 显示全部楼层
这和我观察到的西方审美从幼态纤细化过渡范现代粗壮化男性中性化审美同步
 楼主| 发表于 2018-6-13 20:31 | 显示全部楼层
A British team recently found IQ score results falling by 2.5 to 4.3 points every decade since approximately the end of the second world war. And this past December, another group from the U.S. found that children who grew up eating a lot of fish tended to have higher IQs—and they slept better, too, which is another factor involved in adult intelligence levels. Notably, children in many countries in the modern era eat very little fish.
发表于 2018-6-13 22:13 | 显示全部楼层
......
小鲜肉万岁
发表于 2018-6-13 22:13 | 显示全部楼层
......
小鲜肉万岁
发表于 2018-6-16 11:59 | 显示全部楼层
因为钱多了,优胜劣汰的自然机制失灵
发表于 2018-6-16 19:49 | 显示全部楼层
And this past December, another group from the U.S. found that children who grew up eating a lot of fish tended to have higher IQs—and they slept better, too, which is another factor involved in adult intelligence levels  ...
skyyrie 发表于 2018-6-13 20:31


这个有点意思~~
发表于 2018-6-16 20:17 | 显示全部楼层
怪不得我妈小时候老叫我吃鱼呢,貌似以前就有广告关于DHA的。 8# imvivi001
发表于 2018-6-16 20:48 | 显示全部楼层
9# passer-by
以前曾经靠贩卖天然DHA产品小赚了一笔,那时候吹嘘的噱头之一对大脑有好处,呵呵
 楼主| 发表于 2018-6-17 09:11 | 显示全部楼层
西方二战后有去短颅化,估计和这个也有一些原因
发表于 2018-8-15 16:17 | 显示全部楼层
中国自1980年之后智商开始下降
发表于 2018-8-15 18:16 | 显示全部楼层
知识是累积的,不读书的低,读书的越读越高
发表于 2018-8-15 18:19 | 显示全部楼层
13# tera
物质是有限的,所以智商是有上限的,不读书的低,读书的越读越高
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