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Apologies to the reader. Perhaps I wax tedious. But the question of intelligence is both interesting to me and great fun as talking about it puts commenters in an uproar. It is like poking a wasp’s nest when you are eleven. I am a bad person. Clearing the underbrush: Obviously intelligence is largely genetic–if it... Read More
Chanda Chisala and I post about each other so often that we should be employing the same agent. Properly managed, I might finally get onto a lecture tour circuit somewhere. The Shetlands, perhaps. Below is the post to which I am referring. My reply to Chisala’s post has hardly been prompt: one source of... Read More
Dear Prof Posthuma, Thank you for your comments. These comments are not new, and that is not necessarily a bad thing. Actually, it works to my advantage because over the years I have had the opportunity to develop ways to rebut these criticisms. One of the ways of answering your criticisms, and the one which... Read More
As you know, this blog moves at internet speed, not the glacial creep imposed by academic publishers, with their lucrative frustration of intellectual discourse. No sooner do I write about the work of Piffer, and his use of the new findings of Sniekers et al. (2017) than a senior author on that latter paper, Prof... Read More
Polygenic scores cannot predict a person's IQ, but can they tell a genius apart from the crowd?
A day is a long time in genetics research. Yesterday I made the following prediction about the method that David Piffer has used to estimate racial intelligence: Prediction: we will need very many more SNPs before we can attempt predictions of individual IQs across different races at better than a correlation of r=0.7 Having made... 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
Underestimated associations
It is now commonplace to denounce any observed associations between groups and behaviours as being “stereotypes” with the strong implication that these preliminary impressions are dreadfully wrong, and malevolently so. However, these first impressions should be evaluated against objective measures, in which case they can be shown to over or under estimates of the association... Read More
My first experience with Raven’s Matrices was as a psychology student. We did the test as a group, and then the Alice Heim 5 test of high grade intelligence, and finally inexpertly attempted to give each other the Wechsler test of adult intelligence. As you will have noted, the concept of intelligence and the ways... Read More
After the slaughter of innocents, the ritual of abnegation. While parents pleaded for news about the pieces of their children, the citizens of Manchester met in a public show of solidarity, in an all faith meeting to show that “the bombers would not win”. We have plenty of experience of organizing those. Commendable, very Christian,... Read More
No sooner do I return from my own intelligence conference, about which more later, than I note, courtesy of another scholar, a fascinating new paper showing that 40% of the variance in IQ can be accounted for by a new measure of brain networks. This is strong stuff, so with a spinning head I tried... Read More
There is nothing like sex differences in intelligence to put you on the wrong side of half the population. The story so far is that the standard academic opinion on sex differences in intelligence is that there aren’t any, or that they are small, or that the few that exist counterbalance each other. Women are... Read More
My attitude to exercise was best summed up by cartoonist Paul Terry: However, I am not deaf to the cacophony of advisers recommending that people should keep active, particularly the over 50s. The notion seems to be that the elderly serve some undefined but useful purpose which could be prolonged by physical exertion. I find... Read More
Brain size and intelligence
Here is a very interesting paper on sex differences in brain size and intelligence, notable for linking people’s brain scans with their detailed intelligence test results. It has been accepted for publication in Intelligence. Sex differences in brain size and general intelligence (g) Dimitri van der Linden, Curtis S. Dunkel, Guy Madison Abstract Utilizing MRI... Read More
In my last article, “Scrabble Spells Doom for the Racial Hypothesis of Intelligence,” I argued that Africans should not be able to come anywhere near dominating the games of Scrabble (both English and French) or professional checkers, as they apparently do, if their real biological intelligence was anywhere near as low as their nominal IQ... Read More
There was a time when boys played games of marbles following strict playground rules: contestants had to stand a prescribed distance away from the little pyramid of marbles, and chuck only marbles of the prescribed size. Rules ruled. Piaget was intrigued by the explanations children gave for moral judgements, and the playground is the arena... Read More
It is a measure of the quality of British life that one of its longest running TV programs is “University Challenge”, a quiz show for university students. Yes, it has always been a minority interest, but it is a showcase of talent, an astounding example of what bright young people can get to know in... Read More
Estimating blogger productivity
This is not about baseball, but about blogging, but times are hard for some columnists, so I needed to get your attention. Steve Sailer has put up his March statistics (More records for iSteve, April 3) showing that last month his posts generated 19,707 comments containing a total of 1,485,295 words. By any standards, this... Read More
Lead poisoning reduces social mobility
There are still many people who believe that intelligence does not exist or that it cannot be measured, particularly if the summary result is given as a single figure. The argument seems to be that single figure cannot possibly represent their myriad abilities. Quite so. What are they to make of a recent finding by... Read More
I can claim to have been assaulted by micro-aggressions. I find myself profoundly hurt when people in my presence say “Intelligence – whatever that is”. They do it to vex me, which is beastly of them. Other aggressive behaviours include people in conversation denouncing anyone who holds a particular political opinion, without considering that I... Read More
The mental convolutions in which some will engage in order to ignore the evidence that the polar ice caps are melting—and if not from warming from what?—is as astounding as the convolutions and denial of basic facts that characterize those who believe the government’s official 9/11 fairy tale. If all science is rigged, as a... Read More
I am fortunate in having readers who look after me. Some have offered me refuge in their countries and their homes from what they expect otherwise will inevitably be the midnight knock on my door. Others correct my mistakes from typos to content. As I have never considered myself infallible, I carefully read what they... Read More
Earth has not anything to show more foul
As these things go, it was not too bad. One idiot in a car murdered 3 people, with 7 more in a critical condition who may die, at least 40 with terrible injuries, and many more people traumatized. Crowds of tourists ran away from the place of slaughter at Westminster Bridge. Earth has not anything... Read More
Saturday is a relative slow day in my household, so it felt somewhat of a rebuke to read on the BBC that the Tsimané people have an ideal lifestyle, walking some 17,000 steps a day, as compared to the lethargic wealthy West, who aim for 10,000 daily steps but rarely take them. Those of... Read More
Despite being interested in intelligence, I am also on guard against judging the mind from the face (there's no art to find the mind's construction in the face) while probably doing just that all the time. I assume that I judge mental ability by conversations which go beyond pleasantries. Indeed, perhaps measuring how quickly people... Read More
Blade Runner had an impact on me, both as a film and because it was an introduction to the writings of Philip K Dick, whose whimsical work was based on wondering what it meant to be human. Are we as individuals merely constructions of fundamental genetic coding mechanisms, which create treasured but probably false memories... Read More
Smart groups are (simply) groups of smart people.
Few things attract more attention in the business world than new ways of making groups work well. As any fool knows, groups are a pain. They argue, dither, drift off course, waste time and resources, and produce loads of rubbish. Worse, all those participants draw salaries, so treasure is wasted. Surely, bosses think, any technique... Read More
Personally, after reading the above description, I have Linda in my mind’s eye, and I can just see her lecturing me on what sort of yoghurt I should eat. If I ever met her, I would not dream of admitting that I drive a diesel car, and that I have very recently taken up sketching... Read More
Add fertilizer and yields are boosted, up to a plateau; ignore the quality of the seed and yields slowly decline.
Everyone knows about the Flynn Effect, but very few about the Woodley Effect. When Woodley was working on his paper in 2013 “Were the Victorians cleverer than us? The decline in general intelligence estimated from a meta-analysis of the slowing of simple reaction time” I wrote to Charles Murray about his findings, and in his... Read More
Throughout my American Nations series (based on the books American Nations: A History of the Eleven Rival Regional Cultures of North America by Colin Woodard and Albion's Seed: Four British Folkways in America by David Hackett Fischer) I've talked about how North America is divided into distinct ethnocultural regions based on historic settlement patterns. These... Read More
It is good that people are discussing IQ. Fred Reed’s post has drawn many comments, too many for me to answer individually. Here I outline the main heads of his argument as I see them, and some of the relevant research. My summary of Reed’s post is: Intelligence is important; intelligence research is important and... Read More
No story about the brain is simple; no one study is definitive; and it takes many years to sort out conflicting and inconsistent findings and establish a weight of evidence. It is a fundamental truth that any researcher who can put a person in a scanner can publish a paper. Any researcher able to talk... Read More
In my earlier entry (Clannishness – The Series: How It Happened), we saw that the thing that made the difference between WEIRD Northwestern Europeans and their more clannish neighbors was the selective pressures that each underwent during their histories – particularly since the fall of Rome until the present. This era in time established the... Read More
  I have never played Scrabble. I may have tried once, but certainly gave up very quickly, before even finishing the game. I like words, but I don’t particularly like games. I can’t see the point of Scrabble, and would prefer to read a book, in which the words are assembled to convey meaning. Unscrabble.... Read More
Intelligence is worth talking about because both the reality of intelligence and perceptions regarding intelligence set limits on the possible and influence policy. For example, if the population of India on average really is below borderline retardation, the country can never amount to anything. If Latino immigrants really are as stupid as white nationalists hope,... Read More
What is the use of Psychology? Surely knowing some psychology should confer an advantage? I mean a real advantage, over and above being able to give complicated post-event commentaries? How about this? If survival means avoiding premature death, then living is perpetual problem solving, and the better the solutions to problems, the better the standard... Read More
Flynn Effect background explanations.
    The Flynn Effect is important to understand; it is better understood now than ever before, but there is more to research; and it is probably more limited in its real-world consequences than people imagine, though the long-term consequences are still being debated. Say you take any test of ability, and as an example... Read More
  The Flynn Effect was originally noted by Rundquist (1936) and Lynn (1982) and then Flynn (1984). Credit should probably go to Runquist, but a happy compromise is to call it the FLynn effect, in honour of the two major researchers. The history has been described by Lynn, in part of a Special Issue on... Read More
My earlier entry (Clannishness – the Series: Zigzag Lightning in the Brain) established that there are deep distinctions between Northwestern European peoples and most of the rest of the world, and that these differences have a huge impact on the world, including on levels of human development, the strength of democracy and democratic institutions, scientific... Read More
I am still settling in at so please forgive me if I forget my lines and bump into the furniture, because the stage is much larger than my former small theatre. Not only that, but the cast is enormous, and the commentating audience ten times larger than usual, and rowdier. No country for an... Read More
Things move fast. A published paper comes to the attention of Steve Sailer and suddenly a section of a puzzle gets completed. Better still, the boundaries of ignorance get pushed backwards, which is always a good idea, and a fine Christmas present. From the isolation of my study, and from the depths of my... Read More
Thank you to the 5018 readers who looked in on “Psychological Comments” yesterday. Why? Not complaining, just curious. For the previous highest daily total see:
One of the delights of being a member of a community of researchers in the modern age is the speed with which colleagues can come together to answer a question and scope out a solution to a problem. Steve Sailer has looked at the most recent PISA results, which he has been discussing generically for... Read More
If you are of sensitive disposition, and certainly if you are over 60 years of age, look away now. Age is not good news for the thinking person. The results can be summarised in one word: decline. If you protest that I have been too brief, I can triple the word count: decline and fall.... Read More
In my day, intelligence and personality required completely different lectures. Indeed, the subject areas did not overlap at all and each had a very different tone: intelligence involved intelligence tests, in which it was possible to do badly, which was certainly a disappointment to many in the class, and a source of much anti-IQ resentment.... Read More
A blogger is a harmless drudge, a filter paper between a sack of coffee beans and a small expresso. On the positive side, there is a sack of information to be read in the torrent of publications on intelligence. On the negative side, there is an even greater Sargasso Sea of mangled misunderstanding about human... Read More
Writing a blog can be fun. Post something up one day, get someone writing in with a good tip about another subject for the next day. The notion that immigrants are criminal has been described as a stereotype. As you know, a stereotype is a preliminary insight, the first step in noticing differences and encapsulating... Read More
Are immigrants more likely to claim benefits, or is this a stereotype? A stereotype is a preliminary insight. A stereotype can be true, the first step in noticing differences. For conceptual economy, stereotypes encapsulate the characteristics most people have noticed. Not all heuristics are false. Here is a relevant paper from Denmark. Emil O. W.... Read More
A few hours ago I posted up a commentary on a paper: Brad Verhulst, Lindon J. Eaves, Peter K. Hatemi. Correlation not Causation: The Relationship between Personality Traits and Political Ideologies. Am J Pol Sci. 2012; 56(1): 34–51. Somewhat warily I added: Sure enough, a single paper is an insufficient basis for a comment,... Read More
Losing an election is no fun. Hopes are dashed, and at least 4 years must pass (5 in the UK) before electors get a chance to vote the other lot out. Deferred gratification is a test of character. It is natural for the losing side to feel incredulous when their side is defeated, particularly if... Read More
Last night I went to bed expecting a Clinton victory, because although opinion polls can be wrong, the margin of Democrat advantage exceeded the apparent margin of polling error. To further confirm my ineptitude at forecasting, I had also thought Remain would win over Leave in the Brexit referendum, for the same reason. Today I... Read More