Who Had the Highest IQ of All Time?

[Monique]

What I'd like to see is a study that compares correlation of IQ scores of monozygotic twins raised apart to correlation of IQ scores of unrelated matched individuals.

 

[selfAdjoint]

There is a major new paper on the physical correlates and heritabilitiy of g.

See the summary at http://www.gnxp.com/MT2/archives/002366.html?entry=2366, and then follow the link there to read the whole PDF file. To all those people who claim IQ and g are fictions, here's the evidence they are real.

And Monique, it's not very productive at this late date to quote Gould's Mismeasure of Man against Jensen. That book has been shown by professionals to be tendentious and misleading. It's agit-prop, not science.

 

[Monique]

I agree cognitive abilities can be inheritable.

But you have to agree that the effect is most clear in MZ twins, less clear in DZ twins, even less clear in siblings, disappearing in cousins. So how would you justify extending MZ twin data to a whole population.

I will believe data on restricted purified groups, not on undefined populations such as Asians and whites.

 

[shonagon53]

It's agit-prop, not science.

I just read your article. If that isn't agit-prop, then what is.

It's full of subjective appreciations and bold statements which are open for ideological debate. It's a highly political article, using a warrior tone and a combattant style of reasoning.


Just one quote (about the ideological relevance of HapMap):

"We will know that we are triumphant when educated people believe that human genetic differences matter and they matter intensely."

-Now that's the tautology of the matter: the HapMappers will need a lot of lobbying to shove that up "educated people's" throats. They believe what they want to believe. (They use the word "believe" themselves.)

-For me, and for many "educated people" (they're called "nihilists" by the HapMap fundamentalists) genetic differences are so small, that they don't matter very much; the equality is far greater and far more important.

Deciding how "intensely" they matter is a purely social, cultural, political and ideological matter.

Sorry, no escape from politics on this one.

You know, many educated people (the ones who will be triumphant) have read Fukuyama's "Our Posthuman Future" and they understand the basic fact that whenever you're trying to assess the "importance" of genetic differences, you're out of science and into politics.

 

[Tigers2B1]

What I'd like to see is a study that compares correlation of IQ scores of monozygotic twins raised apart to correlation of IQ scores of unrelated matched individuals.

Well - here is a chart (linked below) showing IQ results and the correlation with the degree of genetic relatedness (including unrelated individuals) -

Note that this guy doesn’t appear to be an advocate based on the subscript -- so, I suspect that if pushed, I could find stats that are more compelling than these -

http://www.mun.ca/biology/scarr/IQ_Correlations.htm

 

[selfAdjoint]

I just read your article. If that isn't agit-prop, then what is.

I agree that GNXP and related sites like Steve Sailer and Griffe du Lion are political to the max, and their use of genetics and statistics is racist (although you know, you have to refute the statistics and genetics, not just call names).

But the paper is not racist and the bullet point summary of it is good, comments apart. This is genuine scientific data.

 

[hitssquad]

GNXP's summary of Gray-Thompson 2004 vs GNXP's commentary on Gray-Thompson 2004

There is a major new paper on the physical correlates and heritabilitiy of g.

See the summary at http://www.gnxp.com/MT2/archives/002366.html?entry=2366, and then follow the link there to read the whole PDF file. To all those people who claim IQ and g are fictions, here's the evidence they are real.

And Monique, it's not very productive at this late date to quote Gould's Mismeasure of Man against Jensen. That book has been shown by professionals to be tendentious and misleading. It's agit-prop, not science.

I just read your article. If that isn't agit-prop, then what is.

selfAdjoint said "summary." The GNXP http://www.gnxp.com/MT2/archives/002366.html?entry=2366 linked to by selfAdjoint contains, according to the introduction "First, a bulleted list. Then, my commentary, and finally the full Thompson/Gray PDF."

It's full of subjective appreciations and bold statements which are open for ideological debate.

The summary ("bulleted list") section - aside from the use of the word "Intriguingly" in Point 4 of the "Behavioral Genetics of IQ" section - does not appear to contain agitprop. In contrast, the commentary section that follows it does appear to contain, or be, agitprop. Here is the former:

• these are the points reviewed by the article, divided by subheading:
  
  
  Neurobiological determinants of intelligence as measured by IQ:
  
  
  1. Posterior lesions often cause substantial decreases in IQ. Duncan and colleagues suggested that the frontal lobes are involved more in Gf and goal-directed behaviour than in Gc (Fig. 2). In addition, Gf is compromised more by damage to the frontal lobes than to posterior lobe...
  2. MRI-based studies estimate a moderate correlation between brain size and intelligence of 0.40 to 0.51
  3. g was significantly linked to differences in the volume of frontal grey matter, which were determined primarily by genetic factors... the volume of frontal grey matter had additional predictive validity for g even after the predictive effect of total brain volume was factored out
  4. Only one region is consistently activated during three different intelligence tasks when compared to control tasks...The surface features of the tasks differed (spatial, verbal, circles) but all were moderately strong predictors of g (g LOADING; range of r, 0.55–0.67), whereas control tasks were weaker predictors of g (range of r, 0.37–0.41). Neural activity in several areas, measured by a positron emission tomography (PET) scan, was greater during high-g than low-g tasks.
  5. Speed and reliability of neural transmission are related to higher intelligence (reviewed in Refs 15,20). Early neuroimaging studies using PET found that intelligence correlated negatively with cerebral glucose metabolism during mental activity54 (for a review, see Ref. 55), leading to the formulation of a 'neural efficiency' hypothesis...
  6. Gf is mediated by neural mechanisms that support the executive control of attention during working memory...greater event-related neural activity in many regions, including the frontal, parietal and temporal lobes, dorsal anterior cingulate and lateral cerebellum. Crucially, these patterns were most distinct during high-interference trials, even after controlling for behavioural performance and for activity on low-interference trials within the same regions
  7. RAPM scores obtained outside the scanner predicted brain activity in a single left parietal/temporal region, and not in the frontal lobes.
  8. An exploratory fMRI study60 (n = 7) indicated that parietal areas are involved in inspection time tasks, specifically Brodmann area (BA) 40 and the ventrolateral prefrontal cortex (BA47) but not the dorsolateral prefrontal cortex
  
  
  Behavioral Genetics of IQ:
  
  
  1. Monozygotic twins raised separately following adoption show a correlation of 0.72 for intelligence
  2. For 48 identical twin pairs separated in early infancy and reared apart, Bouchard et al.83 found remarkably high between-twin correlations for verbal scores on the WAIS (0.64) and for the first principal component of special mental abilities (0.78)
  3. Psychometric g has been shown to be highly heritable in many studies, even more so than specific cognitive abilities (h2 = 0.62, Ref. 87 compare with Ref. 88; h2 = 0.48, Ref. 89; h2 = 0.6–0.8, Refs 90,91)...
  4. Intriguingly, the influence of shared family environments on IQ dissipates once children leave home — between adult adoptive relatives, there is a correlation of IQ of -0.01
  
  
  Molecular Genetics of IQ:
  
  
  1. Chorney et al.104 discovered an allelic variation in a gene on chromosome 6, which codes for an insulin-like growth factor-2 receptor (IGF2R), that was linked with high intelligence...
  2. Later studies identified a second IQ-related polymorphism in the IGF2R gene, and others in the cathepsin D (CTSD) gene, in the gene for an acetylcholine receptor (CHRM2)106, and in a HOMEOBOX GENE (MSX1) that is important in brain development107, 108.
  3. Influence of each polymorphism was minimal — variants of CHRM2 accounted for a range of only 3–4 IQ points, whereas different forms of CTSD accounted for about 3% of the variation between people...None of these associations has yet been replicated by other research groups
  4. Some patients with microcephaly also possesses the ASPM mutation, indicating that a shortened version of the gene might lead to the development of fewer cerebral neurons and a smaller head.
  5. Polymorphism in the human brain-derived neurotrophic factor (BDNF) gene is associated with impaired performance on memory tests
  6. Catechol-O-methyltransferase (COMT) gene influences the activation of working memory circuits. COMT polymorphisms seem to be highly specific to some prefrontal cortex-dependent tasks in children.
  7. Dopamine receptor (DRD4) and monoamine oxidase A (MAOA) polymorphisms are associated with differences in performance and brain activity during tasks that involve executive attention

You know, many educated people (the ones who will be triumphant) have read Fukuyama's "Our Posthuman Future" and they understand the basic fact that whenever you're trying to assess the "importance" of genetic differences, you're out of science and into politics.

It appears that the commentary section that follows the above-quoted article summary may gave been written intentionally in an agitprop style.

 

[shonagon53]

I agree that GNXP and related sites like Steve Sailer and Griffe du Lion are political to the max, and their use of genetics and statistics is racist (although you know, you have to refute the statistics and genetics, not just call names).

But the paper is not racist and the bullet point summary of it is good, comments apart. This is genuine scientific data.

I agree that the article is sound science, but there's a tad of propaganda in it too. I think we can agree on that.

The basic question remains: do you agree that judging to which extent "genetic differences" matter ("intensely" or not), is always a cultural, political, social and ideological judgement?

Isn't that what makes science mere science, and once you're out of that realm, politics begins?

Most scientists agree that global warming, caused by humans, is a scientific fact. But the extent to which this matters, and what, if anything, we should do about it, is always a political question. (In this case: there are sound arguments to say that Kyoto is important, but that there are far more important things, like the war against terror, aids, hunger, or providing sanitation and clean water to people).

So once again, genetic research is genetic research. Nothing more, nothing less. What we do with it, and how important we judge these scientific findings to be, is always a socio-political problem, open for debate. The HapMap people simply "state" that they think that genetic differences in IQ matter very much. But this is clearly an ideological debate.

Wouldn't you agree with that?

 

[Tigers2B1]

A question on the correlation of brain size and IQ results. While I understand that this correlation exists in both men and women (when compared within sexes) -- women, on average, have a smaller brains and fewer neurons than men even after correcting for body -- without similar differences in IQ results. Is the reason for this diffference known?

Is this related to the differences in male and female brains -- that is, men are more aggressive and the areas thought to control agression are proportionally larger in men --- while the portion that links the right and left sides of brains is larger, after considering body size, in women. Maybe women use their brains in less of a lopsided manner?

 

[Vance]

A question on the correlation of brain size and IQ results. While I understand that this correlation exists in both men and women (when compared within sexes) -- women, on average, have a smaller brains and fewer neurons than men even after correcting for body -- without similar differences in IQ results. Is the reason for this diffference known?

Is this related to the differences in male and female brains -- that is, men are more aggressive and the areas thought to control agression are proportionally larger in men --- while the portion that links the right and left sides of brains is larger, after considering body size, in women. Maybe women use their brains in less of a lopsided manner?

I am sorry for my ignorance but may I ask what makes you think men are more aggressive than women since I think it depends on each person and on circumstances in which each individual is educated and grown up ?
Or am I misreading your post at any points up there ?

Thanks,

 

[Monique]

LOl, I google the words agression and testosterone and out came a PF thread
https://www.physicsforums.com/archive/t-6281"

Tigers2B1, efficiency of the neuron routing is important too and not just neuron mass :)

 

[selfAdjoint]

So once again, genetic research is genetic research. Nothing more, nothing less. What we do with it, and how important we judge these scientific findings to be, is always a socio-political problem, open for debate. The HapMap people simply "state" that they think that genetic differences in IQ matter very much. But this is clearly an ideological debate.

Wouldn't you agree with that?

Yes I would. Part of my problem is that the folks I call the "tabula rasists" - including Gould and Lewontine but also a lot of vaguely leftist journalists - have for decades tried to tell the public that the good science is bad science, that the people who do it are in the line of the bad old eugenicists, and so on. Not in our Genes and Mismeasure of Man were salvos in that war. All I want is for the scientific tradition that this paper represents, and that Jenson represents be allowed to continue without smearing.

 

[hitssquad]

UCLA neurology researcher Paul Thompson's web site

There is a major new paper on the physical correlates and heritabilitiy of g.

See the summary at http://www.gnxp.com/MT2/archives/002366.html?entry=2366

That is a summary of a (his most recent) Paul Thompson paper. You can read all of Paul Thompson's brain imaging peer-reviewed articles at his http://www.loni.ucla.edu/~thompson/thompson.html .

 

[shonagon53]

Yes I would. Part of my problem is that the folks I call the "tabula rasists" - including Gould and Lewontine but also a lot of vaguely leftist journalists - have for decades tried to tell the public that the good science is bad science, that the people who do it are in the line of the bad old eugenicists, and so on. Not in our Genes and Mismeasure of Man were salvos in that war. All I want is for the scientific tradition that this paper represents, and that Jenson represents be allowed to continue without smearing.

Gould was a child of his time. I think most non-experts today (like you and me) would agree that both nature and nurture are important, and it's all a very complex combination of factors.

The only ones I'm wary of are the ones who generalize. And you still find those in both camps.

 

[selfAdjoint]

I agree that nature and nurture are both important. If you look at the Gray-Thompson paper you will see that they adopt the fluid g, G_F and crystalized g, G_C formalism. In this view the common cognitive factor g is composed of two parts, one of which increases through childhood but becomes fixed at maturity and doesn't change afterward, except to decline in old age. The other component, is basically th result of environment and increases throughout life. So an old fart like me may have lost some IQ points, but might make up for it by knowing a lot of cagy tricks.

 

[shonagon53]

So an old fart like me may have lost some IQ points, but might make up for it by knowing a lot of cagy tricks.

Good for you, eh.

Also, I think most people couldn't bare to live with the idea that everything they do, think, and feel is genetically predetermined in some sense. They would refuse to know and keep some mystery.

This is what that old misunderstood chap Nietzsche thought of when he wrote about "der Übermensch". The Übermensch is the one who fully accepts fate as it comes, while the Untermenschen still need religion or other cultural superstructures to cope with it.

I think we will all remain Untermenschen for a very long time. :-)

 

[hitssquad]

Cattell's investment theory of fluid g and crystallized g

I agree that nature and nurture are both important. If you look at the Gray-Thompson paper you will see that they adopt the fluid g, G_F and crystalized g, G_C formalism.

Actually, it is a Cattellism.

In this view the common cognitive factor g is composed of two parts,

No. Cattell's investment theory (his theory of Gf/Gc) is incompatible with the existence of g.

• ...Cattell and Horn prefer not to extract the third-order factor, or g, contrary to the practice of most factor analysts. The Cattell-Horn model of abilities, therefore, is called a truncated hierarchy. That is, it lacks the apex of the hierarchy of factors, which is g. Cattell has stated in italics 25 that "there can be no such thing as a categorical general factor" (p. 87 )...
  
  At the time that only two factors, Gf and Gc, stood at the highest level of Cattell's "truncated" hierarchy, there was a valid reason not to extract a thirdorder g. The reason is not that g doesn't exist in the test battery, but that a thirdorder hierarchical g is mathematically indeterminate when there are no more than two second-order factors. That is, there is only one correlation (i.e., the correlation between the two second-order factors, e.g., Gf and Gc) and all that can be determined is the geometric mean of the these factors' g loadings, which is equal to the square root of the correlation between the two second-order factors. Although we can know the average of the two factors' g loadings, we can't know the exact g loading of each factor separately, and ipso facto we cannot properly calculate the g loadings of each of the tests in the battery or calculate the g factor scores of the subjects who took the tests.

Arthur Jensen. The g Factor. p124.

one of which increases through childhood but becomes fixed at maturity and doesn't change afterward, except to decline in old age.

Fluid g peaks and starts declining somewhere in the late-teens to mid-twenties, except in persons who adopt comprehensive anti-senescence regimens.

The other component, is basically th result of environment and increases throughout life.

The phrase result of environment makes no sense in this context, and using the word environment to describe what Gf (fluid g) is applied to in order to arrive at the accumulated knowledge of Gc (crystallized g), after first using it in the same paragraph to refer to the environmental component of heredity, amounts to an instance of equivocation.

In heredity, variance in genetic code and variance in environment each, and only each, account for a portion of total variance in phenotype. In development of fluid g, theoretically, both of the environments, biological environment and intellectual environment, play roles. In development of crystallized g, theoretically, of the two aforementioned types of environment, only intellectual environment plays a role. Although both Gf and Gc are substantially heritable and to almost equal degrees, according to theory, the non-environment component of Gf is genetic and the non-environment component of Gc is Gf (such that you need Gf in order to get Gc, but Gc is what you would remember even if you lost your Gf - as in the case of growing old and still retaining your cagey smarts, if not your general mental ability at its former youthful level, as you noted selfAdjoint).

 

[selfAdjoint]

There's a neat cartoon in this week's New Yorker. A long line of steps, with on the lowest some animal, and then an ape, and then a neanderthal, and finally a modern man, standing on the middle step visible, looking pensive. And the neanderthal says, "Ah! Now you notice how many steps are still ahead!".

 

[hitssquad]

How many evolutionary steps are still ahead for man

There's a neat cartoon in this week's New Yorker. A long line of steps, with on the lowest some animal, and then an ape, and then a neanderthal, and finally a modern man, standing on the middle step visible, looking pensive. And the neanderthal says, "Ah! Now you notice how many steps are still ahead!".

• If all that matters is producing a higher species, one a quantum leap beyond our own in terms of intelligence and scientific expertise, it should make no difference who they are, or what they are, or where they are. Cattell says we should liquidate our own species in favor of a higher one. If a higher species visited Earth and needed our space, would he say we ought to conspire in our own demise? There would be no biological continuity between humanity and them, but surely that is morally irrelevant. They would have done us the favor of providing a short cut to our goal: we could make way for them now rather than wait thousands of years to evolve into something like them. Ethics aside, it is hard to see why biological continuity between our species and another species should have any psychological appeal. Cattell hopes that the next ten thousand years will produce a dozen species so far removed from one another, and from ourselves, that they cannot mate successfully. We must face up to how different these creatures would be from ourselves. As Cattell himself remarks, the gap would be at least as great as between ourselves and a chimpanzee. Olaf Stapledon (1968) in his novel Last and First Men, written in 1931, confronts us with seventeen successor species evolving over two billion years: giants with fused toes, short-lived creatures without humor, big-brained creatures with vestigial bodies and without any emotion we would consider normal, creatures with life expectancies of 250,000 years, and so forth. No matter where they came from, outer space or terrestrial evolution, does anyone really want to sacrifice themselves to creatures of this sort? It is one thing to be kind to species at our mercy, another to be morally obliged to put ourselves at the mercy of an alien species.
  
  If we must maximize intelligence, there is the option of creating artificial intelligence. Here there would be no biological substratum at all, but again that seems irrelevant, unless Cattell makes the fatal concession that he feels no psychological tie with inorganic entities. At least with them, we could minimize the risk to ourselves by following Isaac Asimov's laws and building into our creations an inhibition against taking human life. I present this option not so much as a realistic possibility but rather to pose the question of how much we would be willing to sacrifice for intelligence, assuming a total absence of psychological rapport with whatever is intelligent. Then there is the likelihood that our experiment with intelligence is not unique, that countless planets have already populated the universe with higher intelligences. Cattell grants this possibility but offers a rebuttal: Why have we not received any communications from outer space? Perhaps all other intelligent species have made the Hedonic Pact: they may have been too weak to do their duty and traded away evolutionary and technological progress for universal cooperation and happiness. So our species may offer the universe its last chance. One must weigh the probability of Cattell's explanation against a certainty: the ten thousand years of suffering dictated by choosing his path. However, it is far more important to note what he has conceded: the obligation he wishes to impose is falsifiable. The first communication received from a higher species (the very fact that we receive it will almost certainly betray the presence of a higher species) will relieve us of our burden.

(James R. Flynn. How to Defend Humane Ideals: Substitutes for Objectivity. pp122-124.)

 

[hitssquad]

A science of group behavior built on a _tabula rasa_ theory of the human mind

the folks I call the "tabula rasists" - including Gould and Lewontine but also a lot of vaguely leftist journalists - have for decades tried to tell the public that the good science is bad science, that the people who do it are in the line of the bad old eugenicists, and so on.

• In sociology, the thin ranks of able researchers, hemmed between armchair, philosophical sociologist colleagues on the one hand, and short-sighted do-gooders with the scientific standards of social workers on the other, can advance but slowly. For the last fifty years it has shown a notorious bias against accepting the findings of behavior genetics and has tried to build a science of group behavior on a _tabula rasa_ theory of the human mind, which was discredited soon after John Locke proposed it two centuries ago.

Raymond B. Cattell. A New Morality from Science. Chapter 2.9.

 

[Waterdog]

real irony, or alanis morrisett irony?

In sociology, the thin ranks of able researchers, hemmed between armchair, philosophical sociologist colleagues on the one hand, and short-sighted do-gooders with the scientific standards of social workers on the other, can advance but slowly. For the last fifty years it has shown a notorious bias against accepting the findings of behavior genetics and has tried to build a science of group behavior on a _tabula rasa_ theory of the human mind, which was discredited soon after John Locke proposed it two centuries ago.
Raymond B. Cattell. A New Morality from Science. Chapter 2.9.

Hmm, apparently Cattell possessed a unique dictionary in which "discredited" was defined as "among the most influential ideas of all time." Of course, whether an idea is given "credit" by others has no direct relationship to the validity of that idea. Locke probably was wrong about the "tabula rasa," but his idea was certainly not "discredited"--among other things, it was the basis of the American education system in the late eighteenth and early nineteenth centuries. See Gillian Brown, The Consent of the Governed: The Lockean Legacy in Early American Culture. (Harvard University Press). Despite what you might think based on the title, the book focuses more on Locke's theories of mind than on his social contract theory. Is it ironic that Cattell derides Locke, when Locke was one of the first proponents of empiricism in the study of human beings, which is the basis of modern social sciences such as psychology? I always have trouble figureing out what qualifies as real irony.

It's also funny, and perhaps ironic, that Cattell would bash others for being "armchair, philosophical sociologists," since his own career demonstrates how an otherwise intelligent person can become so infatuated with a set of clever but absurd ideas that he gradually drifts away from reality. He would have made a good science fiction writer. His weird ideas about the future "evolution" of the human species seem similar to Samuel R. Delaney's stuff, though of course since Cattell was a racist if he had written any novels they wouldn't have been very enjoyable to read.

 

[hitssquad]

Interesting argument for adopting SD 15 as an IQ standard

This site is using a standard deviation of 15. The most common standard deviation is 16.

Paul Cooijmans has recently http://members.chello.nl/p.cooijmans/essay/sd15.html (2003) a concise argument for adopting a standard deviation of 15 (a caviat is that Cooijmans is directing his comments to readers concerned about SD values used by ultra-high-IQ societies):

• Reasons to Express IQ with a Standard Deviation of 15[/size]
  
  Paul Cooijmans, 2003[/size]
  
  
  Scores on high-range IQ tests are mostly reported on a scale with a standard deviation (SD) of 16. This is inspired by the Stanford-Binet, a childhood test. I see however a number of reasons to prefer a scale with an SD of 15, similar to the Wechsler Adult Intelligence Scale (WAIS):
  
  
• High-range tests are mostly taken by adults, and in any case report scores according to adult norms. This fits in better with the convention of the WAIS - a test for adult intelligence - to use a 15 SD.
  
• In scientific and other literature on intelligence, IQ is almost always expressed on a scale with an SD of 15, except where one is explicitly talking about childhood scores on the Stanford-Binet.
  
• A 15-scale gives lower numbers, which is good to counteract possible high-IQ snobism and inflation of high IQ numbers.
  
• With a 15-scale you avoid the eternal confusion of mental/chronological age ratio IQ and deviation IQ that you have with the Stanford-Binet/16 SD scale.
  
  To further explain the last point: originally the Stanford-Binet IQs were obtained by dividing the subject's mental age by the subject's chronological age and multiplying by 100. These ratio IQs had a standard deviation of about 12 in the first version of the test, and in later versions went up to about 16. The distribution however was not "normal"; in the "gifted" range scores were far overpresent. Studies of the distribution of these scores have shown that for instance a ratio IQ of 160 only corresponds to about 150 in a normal distribution with SD = 16, and IQ 170 corresponds to about 156 in a true normal distribution. The latest version of the Stanford-Binet, Revision IV of 1986, has dropped the concept of mental age, and expresses the IQs directly on a scale with SD = 16 (such IQs are called "deviation IQs"). As a result, IQs in the "gifted" range are markedly lower than in the past.
  
  As the general public is mostly not well informed in these matters, there is much confusion of ratio IQs and deviation IQs in popular talk about IQ. Astronomic ratio IQs are often quoted in relation to famous persons, without realization that these cannot be compared to adult deviation IQs. There are in fact even quite a few "high-IQ" societies who accept Stanford-Binet scores by the same norm as deviation scores, apparently not realizing they are thus selecting far below their intended level.
  
  The WAIS has from the start only used deviation IQs, so there is never confusion with ratio IQs and overpresence of high scores. If high-range tests are supposed to extend the range of regular tests upward, the 15-scale is the most appropriate.

 

[BlackVision]

LOL. Hitssquad you're still on this? I retract my previous "most common standard deviation is 16" statement. SD16 however is still very common even if not most.

 

[Impossible?]

My IQ changes every time i take the test, it depends how i feel that day, lol, i think ill just take an average and stick with that.

 

[Mandrake]

Mensa

Mensa seems to be set up to strike a happy medium between exclusivity and inclusivity. Mensa may not be meant to be purely exclusive. There are other high-IQ societies that cater to exclusivity, and the fact that a sizable proportion of persons who qualify for those other societies join Mensa also or instead evidences the value of inclusivity.

There are some plusses to Mensa, mostly with respect to their size. The more exclusive societies are, IMO, more attractive to those who meet the entrance requirements, but of those who do, most also belong to Mensa.

Some years ago, there was an interview with Dr. Ware in the Mensa Bulletin. He explained how the entrance requirement happened. When the group was formed, they used a self-administered test, that was distributed by mail. The intent was to screen at the top 1%. After some time, they came to realize that the acceptable score that had been used was actually screening at about the 98th percentile. Instead of revising the testing to establish the intended 99th percentile, they just changed the entrance requirement.

 

[Mandrake]

Speaking of the "higher IQ societies" (those more exclusive than Mensa), here is an interesting history done by a fellow who knows more than one of the prominent members of the community: Highly suggested for entertainment value.

http://www.eskimo.com/~miyaguch/history.html

Anyone who reads this should look for and enjoy the discussion of the Cleo Society! This thing was a masterpiece created by a master creator of such spoofs. It may not be as funny to some, but I know the people involved and find the thing to be hilarious.

 

[Mandrake]

Type this name into Google: Christopher Michael Langan. He is a 40-something year old bar bouncer who has only made $6K a year for most of his adult life. He was featured on 20/20 and was subsequently administered a supervised IQ test by a psychologist that was hired by 20/20. Afterward, the shrink reported that it was the "highest score he had ever seen in his professional career," and estimated Langan's IQ to be somewhere near 190 (S.D. 16)"

Chris is off the charts, but unfortunately had life situations that prevented him from obtaining a formal education. His skill with language is truly impressive.

This would make Langan a little smarter than Marilyn Savant. One must remember that Savant's score of 228 was a ratio score, not a deviation score.

And for that reason the score often quoted is meaningless.

Esquire magazine did an article on Langan, his gifted girlfriend, Dr. Hoeflin, and a couple of other members of the "Mega Society." Interesting and eccentric characters indeed.

The November 1999 article discussed 4 people: Langan, Dr. Gina LoSasso, Steve Schuessler, and Dr. Ron Hoeflin.

For those who have access to Gift of Fire (Prometheus Society Journal), the current issue (150) has an article titled: "The Nature of the Ego" by Dave Garrett, that has some discussion (and a picture) of Chris.

How many know that Mensa has one of the lowest cut-offs of any such club?

What happened to High Five and Camelopard?

P.S., the next time you go to your favorite local bar, just remember that the bouncer in the corner may just be manipulating equations for M-theory in his head.

Yes, that may be true, but the bouncer is not going to be Chris. He and Gina bought a farm out West. If he is bouncing anything, it is more likely to be cows.