About that Mani et al. study

I regularly see this study thrown around from Mani et al. (2013) titled “Poverty impedes cognitive function”. It should be no surprise. In just a few years, it’s gathered over 1,400 citations and made multiple sources of mainstream news (see here, here and here for example). I see it all the time in debates about socioeconomic effects on IQ, despite the fact that it is, all around, a very bad study.

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Defining Intelligence

The issue of “defining intelligence” has unreasonably taken far more effort than it should. The most prominent authors on the topic, such as Arthur Jensen, have argued it is not definable. Charles Spearman, the discoverer of g, believed we should not use the word “intelligence” due to its complexity.

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