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Before posting up Piffer’s paper, I sent it to a reviewer, someone who works in intelligence research. I explained that many geneticists were dismissive about Piffer’s work on group intelligence, and asked for a critical opinion. Here is that opinion, and Piffer’s replies. Piffer also includes responses to the main themes which came out of... Read More
The figure shows standardized polygenic scores by population for Education GWAS, in descending order (1000 Genomes Populations, EA MTAG, N= 3,257 SNPs). One function of a blog is to let people shoot down ideas. Conjectures have a short half-life. Refutations always snap at their heels. David Becker, whose latest version of country IQs received trenchant... Read More
The “missing heritability” problem: current genetic analysis cannot explain as much variance as that suggested by population heritability estimates. This has been a cue for “Down with twin studies” arguments, in which those of dramatic inclinations have chosen to imagine that heritability estimates were thereby disproved. Not so. I was never particularly worried about this... Read More
The intelligence gene hunters have been stepping up their activities, and keep coming back with more trophies. Danielle Posthuma and colleagues are at it again, studying very large samples and finding further novel genes which load on brain tissues. I hope someone somewhere is keeping track of the overall picture, perhaps in a control room... Read More
In my last post I said: I had no idea that my thesis would receive instant support the following day in a paper which begins with a stirring paragraph, worth quoting in full: Since its discovery in 1904, hundreds of studies have replicated the finding that around 40% of the variance in people’s test scores... Read More
Jim Flynn once observed that no-one was funding research into the genetics of racial differences in intelligence because they feared they would find something. Here is my psychologist’s summary of where we are as regards the genetics of intelligence in general: 10%. That is to say, by poking about in the genetic code researchers can... Read More
Post updated, 6/10/14. See below! As we saw previously (see My Most Read Posts), my post Maps of the American Nations is the single most popular post so far here on my blog. Americans all over are supremely interested in both their origins and the reasons for the cultural quirks of the different American regions.... Read More
Superstitions about race never seem to die, in large part because those who peddle racial pseudo-science get funding and publicity from the U.S. government. The Public Broadcasting System has just finished airing a three-part wallow in brainwash called "Race: The Power of an Illusion," which purports, as an academic it interviews spouts, that "Race is... Read More
When the Human Genome Project (the vast plan to decode and map all the genes of the human body) was completed last year, the first pronouncement about it from many scientists was that it proved "race doesn't exist." The claim was not new. The notion that race is merely a "social construct" and a "biologically... Read More
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