IQ genetics or environment? Both come into play

IQ genetics or environment? Let’s provide a bit of background to the question. Many studies have been published which have investigated the issue and it is undeniable that there is a positive correlation between the IQ of offspring with that of their birth parents, especially the birth mother. A particularly intereting series of studies involved …
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IQ and breastfeeding

A recent Brazilian study has found that longer-breastfeeding was linked to higher IQ. The study, published in the prestigious peer-reviewed journal the Lancet, began with 5,914 newborn babies in 1982, and were able to follow up with 3.493 of those individuals three decades later. The study found that those babies who had been breastfed for …
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Intellectual elites

In a recent article (An Hereditary Meritocracy), the Economist magazine argues that a new class of intellectual aristocracy is taking over the United States of America. The article suggests that intellectual elites are more likely to pair up (i.e. find a mate) based on common values such as university education and drive, creating favourable learning environments …
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IQ and schizophrenia

IQ and schizophrenia: A recent study by Virginia Commonwealth University and Lund University sought to evaluate the relationship between IQ and schizophrenia. In popular culture, IQ and schizophrenia are usually thought to be positively associated. For instance, the famous mathematician John Nash shared a Nobel prize in economics for his work on game theory and differential geometry. John …
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IQ is genetic

I have written quite a few postings on the  heritability of IQ. A number of recent studies  have confirm the point that variances in IQ can be explained by genetic factors (to the tune of about 60%), while environmental factors account for up to 40% of variability in IQ. These finding represented a departure from …
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Superhuman intelligence: the new Cold War?

In my last blog posting, I explained how the body of academic literature on human intelligence is increasingly clear: IQ tends to be largely inheritable, with up to 60% of IQ variability explained by genetic factors. I also introduced recent research at US San Francisco which highlighted the ‘VS’ variant of a gene called KL. …
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Superhuman intelligence

Intelligence or IQ is more deeply rooted in genetics than it is in environment factors or upbringing. This is what researchers at Kings College London have found that genetics explain more than 60% of the variability in IQ test results. According to this study, nature wins  . This finding may explain why several prior studies have shown that …
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IQ heritability

I have previously written about IQ heritability. It is the age old question of nature versus nurture. There are a reasonably large number of studies which examines IQ heritability. While the existing body of literature refutes anti-genetics ideology, it also lends support to environmental effects as well. So the extant body of literature of IQ …
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Higher IQ in apes

A new study by researchers at Durham University in the UK looks at the evolution of the brain of primates relative to other monkeys. The lead researcher suggests that the prior thinking about the evolution of apes’ brains may have been wrong. That is, scientists were focusing too much on the neocortex, which is the …
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