111 votes

Does the US Armed Forces refuse to recruit anyone with an IQ less than 83?

Our sister site, Law StackExchange, has this same question: Is it truly illegal for the US army to hire someone with IQ less than 83?, with a high-quality accepted answer. The answer is not a simple ...
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  • 133k
99 votes
Accepted

Is low emotional intelligence associated with right-wing and prejudiced attitudes?

The short answer The study in question (Van Hiel et al. 2019) has been published in a reputable peer-reviewed journal. It presents empirical support for the hypothesis that emotional abilities ...
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  • 8,465
59 votes
Accepted

Drop in IQ due to immigration?

The PISA results are available online. The OECD also published a summary paper which described what PISA is: [T]he OECD Programme for International Student Assessment, PISA, [is] the world’s premier ...
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  • 50.6k
42 votes

Does the US Armed Forces refuse to recruit anyone with an IQ less than 83?

This popular science article, generally backs up Peterson's claims. All military recruits must take the Armed Services Vocational Aptitude Battery (ASVAB) to qualify for enlistment. The ASVAB is ...
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37 votes

Is low emotional intelligence associated with right-wing and prejudiced attitudes?

Here are the relevant paragraphs from the intro to the paywalled paper justifying the first line of the abstract: Over the years however, it has been acknowledged that right-wing authoritarianism ...
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  • 49.7k
36 votes
Accepted

Does IQ testing show that blacks on average score worse than whites?

Yes. See 30 years of research on race differences in cognitive ability (2005). Currently, the 1.1 standard deviation difference in average IQ between Blacks and Whites in the United States is ...
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  • 625
29 votes
Accepted

Has the U.S. Army been conducting IQ tests on their recruits, unintentionally discovering a racial hierarchy of intelligence?

The ASVAB (AFQT) is not technically an IQ test. IQ Tests, per se, are not issued to recruits for the armed forces. The U.S. Army does test people's capabilities, but not in a standardized IQ test (at ...
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  • 413
28 votes
Accepted

Does James Woods have an IQ of 180?

No: these news are not credible at all. The report was investigated by Daily Edge and found to be unreliable for two reasons: it was traced to a single source, Sinembargo.mx and of course this makes ...
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  • 77.9k
25 votes
Accepted

Did the average IQ score in France decline in recent decades?

Conclusion: Although the world as a whole has seen a positive Flynn effect in the past few decades, there have been multiple studies that show a negative Flynn effect in a few places. Dutton and Lynn ...
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23 votes
Accepted

Are liberal/left-wing people more intelligent than conservative/right-wing people?

A lot of the discussion on this topic was provoked by a peer-reviewed study published in 2012. Quoting from the abstract: We proposed and tested mediation models in which lower cognitive ability ...
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  • 7,049
21 votes
Accepted

Do less-intelligent people vote right-wing because they feel safe?

The referenced study is here: Gordon Hodson and Michael A. Busser, "Bright Minds and Dark Attitudes: Lower Cognitive Ability Predicts Greater Prejudice Through Right-Wing Ideology and Low Intergroup ...
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  • 557
21 votes

Does IQ testing show that blacks on average score worse than whites?

I think James Watson's claim is that there is a difference, and that that difference is caused by genetics. The quoted claim includes: inherently gloomy about the prospect of Africa people ...
20 votes
Accepted

Do firstborns have a higher IQ?

Birth order does not influence IQ but social rank in the family does. Birth order is not associated with intelligence in between-family data once the number of siblings is statistically controlled. ...
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  • 2,856
18 votes

Does the probability of entering and remaining in an intellectually elite profession peak at an IQ of 133 and falls with rising IQ?

Executive summary of what follows: No, Ferguson does not support the claim in the question title, nor the more quantitative one in the question body, with trustworthy data. The claim is the result of ...
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17 votes

Does long-term marijuana use lead to a significant drop in IQ?

Since the original article wasn't mentioned in the question, here's a link with abstract: MEIER MH, et. al. Persistent cannabis users show neuropsychological decline from childhood to midlife. Proc ...
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  • 1,566
17 votes

Are people with a high IQ not allowed to become police officers in New London?

The lawsuit reported on by ABC News did happen (Robert Jordan vs. the City of New London, CT). The court case can be found here. That page verifies many of the facts given in the article, including ...
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  • 23.2k
17 votes
Accepted

Do Japanese crows use traffic to crack nutshells?

This behavior has been well documented in Japanese crows, but Cristol et al (the contradicting paper in the question) did not observe it in American crows. This Ph.D. dissertation discusses the ...
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16 votes

Did the term "meritocracy" originate in a dystopian satire?

This question sent me down the rabbit hole, chasing incredibly bad references at Google Ngram, Google Books, and Google Scholar. Some notable supposedly early references that use the word meritocracy ...
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  • 11.2k
15 votes
Accepted

Does the gorilla, Koko, have an IQ in the range 70-95?

Evidence: The tests given to Koko the gorilla were Cattell Infant Intelligence Scale, Peabody Picture Vocabulary Test, Ravens Progressive Matrices and Wechsler Preschool and Primary Scale of ...
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  • 22.5k
12 votes
Accepted

Do the Irish have on average a 8 point lower IQ then the British?

I cannot answer about the UK and Ireland specifically, but the data presented there is not reliable. It comes from books by Lynn and Vanhanen, that have been heavily criticized by other scientists. ...
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11 votes

Do the mother's genes almost exclusively determine the sons' intelligence?

No, this grossly summarised version of the paper overstates its conclusions. The quoted media reports suggest that the mother's genes account for all of the (variation) in intelligence of male ...
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  • 133k
11 votes

Do long-time students at this particular school have an average IQ of 152.6?

tl;dr– No, the claim about high IQ's appears to be based on an early definition of IQ that's no longer used. It's misleading to use this outdated definition of IQ as the claim would be very ...
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  • 4,050
10 votes

Do Australian Aboriginal people have low intelligence and sexual control?

Intelligence Australian Aboriginal people have a lower intelligence This is a very vague question. What is intelligence? And how do you measure it? Is this question about some sort of innate, ...
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  • 50.6k
10 votes

Are intelligent people more nocturnal than people not considered intelligent?

There are several papers which support this claim: 420 participants performed two self-report inventories assessing circadian type, as well as measures of intelligence from two psychometric ...
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  • 2,856
10 votes

Has the U.S. Army been conducting IQ tests on their recruits, unintentionally discovering a racial hierarchy of intelligence?

Differences between the average IQ scores of different racial groups have long been observed. The AFQT has been used to as a measurement of intelligence, notably by the controversial book "The ...
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  • 6,972
10 votes
Accepted

Do day-care centres lower the IQ of children?

In direct reply to the question, the study on which the comment seems to be based looked at children in Rumanian orphanages and does not provide any evidence to support the claim. But: The concern ...
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  • 400
10 votes

Are fussy babies more intelligent?

It does not seem so. The link at the bottom of the article points to this article by Schmidt, Fox, Perez-Edgar and Hamer. My (non-expert) reading of this is that baby fussiness is largely ...
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9 votes

Does having more women in a group increase its collective intelligence?

I was going to edit my question to make some clarifications on the question. which in retrospect could, perhaps, have been more focused, in particular with respect to the notion of "collective ...
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  • 351
9 votes
Accepted

Did Christopher Langan learn to speak when he was only 6 months old?

Unfortunately, without any conclusive audio of Langan speaking at 6 months we can't really prove whether he could or could not speak. However, it is possible, though unlikely, that he could speak very ...
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  • 11.4k

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