iq
gregladen | March 7, 2014Imagine that there is a trait observed among people that seems to occur more frequently in some families and not others. One might suspect that the trait is inherited genetically. Imagine researchers looking for the genetic underpinning of this trait and at first, not finding it. What might you conclude? It could be reasonable to conclude that the genetic underpinning of the trait is elusive, perhaps complicated with multiple genes, or that there is a non-genetic component, also not yet identified, that makes finding the genetic component harder. Eventually, you might assume, the gene will be…
gregladen | May 30, 2013Elizabeth Chin has written an excellent scholarly takedown, in the form of a "letter from your thesis reader," of Jason Richwine's 2009 Harvard PhD dissertation, " IQ and Immigration."
I've not read Richwine's thesis, though I probably will at some point. And you probably haven't either. But, you'll still find Chin's post informative and compelling.
It is here: What Jason Richwine Should Have Heard from his PhD Committee
While you are on the subject have a look at this: Harvard Students Demand Investigation Into Jason Richwine's Thesis On Hispanic IQ
Hat tip: Jennifer Raff.
gregladen | December 26, 2011The presumption being examined here is that humans are divisible into different groups (races would be one term for those groups) that are genetically distinct from one another in a way that causes those groups to have group level differences in average intelligence, as measured by IQ. More exactly, this post is about the sequence of arguments that are usually made when people try to make this assertion.
The argument usually starts out noting that there are dozens of papers that document group differences in IQ. I'll point out right now that most of those papers are published in journals with…
mikethemadbiologist | August 21, 2010Razib, in a link roundup, wrote:
A Grand Unified Theory of Palinisms. Jacob Weisberg, Yale grad and Rhodes Scholar, wonders why Sarah Palin says "stupid and ridiculous things." An easy answer is that she's stupid. But I think the truth is that Sarah Palin is closer to the norm in intelligence and polish than the typical American politician. In fact she's probably somewhat above average in intelligence. The fact that she's a social conservative means that it's easy for Left-leaning elites to mock her, but if you go to a liberal college town in the Berkshires I'm sure you could talk to plenty…
mikethemadbiologist | August 4, 2010This is what children with poor self-control become
(from here)
Melody Dye at Child's Play has an interesting post about the famous (or infamous) cookie experiments, which involved observing children presented with a cookie and then left alone in a room. If they wait long enough, they get another cookie (and they know this). If not, then clearly they are doomed to fail in life:
Twenty years later, having spent long hours forgetting those misplaced moments, a new crop of experimental psychologists will add insult to injury, and call you, and ask pointed questions about your education, your…
mikethemadbiologist | April 26, 2010I think The Huffington Post has outdone itself on the bullshit factor. We now have all-encompassing metawoo. Consider this about the supposed harm that our current methods of teaching science inflict upon the young:
When educators try to inculcate children with the scientific method, the main legacy of traditional science, the outcome is often an educational train wreck. As Jeremy Rifkin, author of The Empathic Civilization, puts it:
[T]he scientific method [is] an approach to learning that has been nearly deified in the centuries following the European Enlightenment. Children are…
jgoldman | April 21, 2010This seems to have become unofficial volcano week, here at ScienceBlogs. If you haven't been following the coverage of the Eyjafjallajökull eruption at Erik Klemetti's Eruptions blog, you should consider doing so. Also, Dr. Isis has a post on how the eruption has fouled up all nuclear imaging plans at her place of research, and Ethan explains how volcanic lightening works.
Our benevolent overlords have further commented: "Eyjafjallajökull's ill temper has been an unexpected object lesson in the complexity and interconnectedness of our environment, technology, and social networks." To that I…
razib | March 4, 2010My posts below on IQ, politics & religion resulted in a fair amount of blogospheric response, and weird comments. A few quick points
1) I think results on standardized tests are informative and correlate reasonably with a host of life outcomes. If you don't think they do, that's fine, I don't particularly care. But just do note that your dismissal of IQ carries no weight with me. Additionally, though I believe IQ to be substantially heritable, even that's not necessarily important in this case (since I am not focusing on evolution). Rather, realized test scores correlate with other…
mikethemadbiologist | March 3, 2010ScienceBlogling Razib has an excellent post, "Why it matters if liberals are much smarter", about the recent work regarding IQ, political orientation, and religious beliefs. Razib's point about the tails of the distribution is key: to the extent that the extemes of high (and low) IQ matter, a slight difference will mean that the skilled positions will be disproportionately held by one group. But what I haven't been able to find out is how those differences arise.
What I mean by this is that IQ is actually composed several different things, and ranges from abstract geometry questions to…
razib | March 1, 2010Update: Also see follow up post.
My previous post where I point to Satoshi Kanazawa's finding that liberals & atheists are smarter than conservatives & the religious was a little drop in the bucket in the blogospheric debate. I made it rather obvious that I wasn't too interested in the evolutionary psychological model of why these patterns exist, rather, I was curious about the patterns themselves. The reason is the one Tom Rees elucidates:
What's got people talking is the correlation between atheism and intelligence, although that isn't what the paper is actually about. It's already…
razib | January 19, 2010Tom Rees reports on an analysis of the GSS which point to the correlation between low verbal skills and a Biblical literalist outlook. Well, I've talked about this at length. Religion & IQ, Biblical literalism or low IQ: which came first?, Pentecostals are stupid? Unitarians are smart? and Educational levels & denomination. Poking around the GSS the powerful correlates of belief in the literal truth of the Bible (variable "BIBLE") jump out at you.
gregladen | January 1, 2010Well, yes. But the question raises some interesting points.
Does a person endorse near slavery, horrific working conditions, the purchase of moral "indulgences" by the privileged, and the manipulation of the population with religious woo-woo when appreciating the architecture of a medieval European cathedral? Because that bad stuff is what happened to make that cathedral exist. If you visit the Sistine Chapel or Notre Dame in Paris you endorse all that is connected to the creation of these edifices. You might as well have personally carried out the inquisition! Especially if you pay to…
gregladen | December 29, 2009This is Chart 1 from Race, Evolutoin and Behavior by J. Philippe Rushton, originally published in the Unabridged Edition of same.
gregladen | December 28, 2009Many people assume human brains vary genetically and genetic variation maps to races. But the races are not real and genetic variation can't explain brain differences. Because, dear reader, brains don't work that way.
Let's look just at the brain part of this problem.
There are between 50 and 100 billion neurons in the human brain, and every one is connected to a minimum of one other neuron to produce about 100 trillion connections. So when we are thinking about how the brain is wired up, we have to explain how so many connections can be specified to make the brain work.
There are…
gregladen | December 22, 2009This post started out as a comment that would have gone here (but would have done just as well here). But it became sufficiently long and possibly interesting that I figured it would make a good, if somewhat rough, blog post.
The presumption being examined here is that humans are divisible into different groups (races would be one term for those groups) that are genetically distinct from one another in a way that causes those groups to have group level differences in average intelligence, as measured by IQ. More exactly, this post is about the sequence of arguments that are usually made when…
razib | December 6, 2009Cardiovascular fitness is associated with cognition in young adulthood:
During early adulthood, a phase in which the central nervous system displays considerable plasticity and in which important cognitive traits are shaped, the effects of exercise on cognition remain poorly understood. We performed a cohort study of all Swedish men born in 1950 through 1976 who were enlisted for military service at age 18 (N = 1,221,727). Of these, 268,496 were full-sibling pairs, 3,147 twin pairs, and 1,432 monozygotic twin pairs. Physical fitness and intelligence performance data were collected during…
mikethemadbiologist | November 17, 2009I've finished reading Richard Nisbett's
Intelligence and How to Get It: Why Schools and Cultures Count, which is a wonderful counterargument to Charles Murray's (and others') genetic conservatism (my phrase, not Nisbett's): intelligence, typically ascertain using IQ, is highly heritable, so there's little point in spending excessively (whatever that means) on educating most people, since it won't make a difference.
Nisbett demolishes this argument in detail (I've also touched on some of these issues in the context of obesity), so I won't rehash the book here, except to note that when one…
razib | September 26, 2009My post below elicited a lot of response. One thing to point out though, which I want to emphasize: a higher proportion of smart people go to college now than in the past. How can this be? First, let's review the change in distributions of intelligence of those with college degrees (or higher) and those without. The first two charts show the proportions of WORDSUM scores for individuals with and without college degrees for two decades. I limited the sample to whites ages 30 and over. So for example in the period between 1974-1984, of those with college degrees and higher 26.8% scored 10 on…
gregladen | June 7, 2009Note: First Woman Michele Obama confirms my suspicion
Who is smarter, men or women?
Any college teacher (at least in the social sciences and life sciences) who has ever paid attention to their own stats know that women do better than men in college classes.
OK, women are smarter. But why?
There are all kinds of post hoc explanations given for this like "Girls get better grades because professors are men, nod nod wink wink" and so on. What a load of crap. Women are smarter than men on average, among the smartest people there is no emperical evidence that women are underrepresented, and…
denialism | February 17, 2009Dan MacArthur has started a big discussion on whether or not the relationship between IQ and race should be studied. Inspired by a pair of essays for and against the idea it has created a pretty healthy debate among the sciencebloggers including Razib with whom I will likely never agree on this issue. For the record, I'm on the side of those like Richard Nisbett (for a good review of his analysis of race and the black white divide see here PDF) that genetics are a poor explanation for the divide.
But this issue aside, why do I believe this is a still a bad idea to expend resources to…