Questions tagged [iq]

For questions about intelligence quotient (IQ) scores, methods of assessment of IQ, and correlates of IQ.

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23 votes
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Medium-term effects of polyphasic sleep on performance

Typical sleep patterns of one big block of 6 to 9 hours with no naps is usually referred to as monophasic sleep. A second natural sleep pattern is biphasic sleep which breaks up your sleep into two ...
Artem Kaznatcheev's user avatar
18 votes
1 answer
988 views

What are the IQ correlations between relatives?

Bouchard and McGue (1981) wrote a review article (linked here) that summarized the correlations between relatives. McGue asserted in a recent talk (that I'm not able to link) that he's not aware of ...
user1205901 - Слава Україні's user avatar
16 votes
2 answers
17k views

Is the average IQ still 100?

IQ tests have been around since Binet invented them in the early 20th century roughly 100 years ago. The point of the test was to measure your mental against your chronological age (hence the quotient)...
Octopus's user avatar
  • 261
16 votes
2 answers
58k views

What is the meaningful difference between someone with a 145 IQ compared to a 100 IQ?

I am a lay person and new to this, and while I do understand that 145 IQ means 3 SDs up from the mean, I want to have a rough idea of what it means in real-life examples, from people who have ...
Enne's user avatar
  • 163
14 votes
2 answers
13k views

Does high IQ correlate with good social skills?

Are people with a high IQ more likely to have good social abilities? Are they more likely to be popular? Wikipedia lists that IQ helps with school performance, job performance and income. It's ...
Christian's user avatar
  • 896
13 votes
1 answer
1k views

Is there any evidence that fluid intelligence is malleable?

So although working memory training was somewhat of a fad (and I guess some benefits did come out of training, like improved attention/executive function), reviews such as Melby-Lervåg et al. (2016) ...
PKiani's user avatar
  • 211
12 votes
2 answers
2k views

Effect of Physical Exercise on Intelligence/IQ

I am interested in empirical research relevant to answering the following questions: What is the effect of physical exercise on IQ/intelligence? Does any such effect vary by type of exercise? e.g. ...
Shan's user avatar
  • 315
12 votes
3 answers
4k views

How to estimate IQ for public figures?

Background: I read a question on Quora that asked how intelligent is Barack Obama. A wide range of arguments were presented. The tone of the answers was not neutral because of the political context of ...
Jeromy Anglim's user avatar
12 votes
2 answers
1k views

Correlation between "mechanical aptitude" and IQ

I am an economist working in labour market issues. It is common in my field to divide jobs between those who are intensive in "manual" tasks and those who are intensive in "cognitive" tasks (e.g. here)...
luchonacho's user avatar
11 votes
4 answers
8k views

Is there a correlation between high IQ and creativity?

Is there a correlation between high IQ for example over 125 and creativity? Is creativity improved or does its importance simply diminish? Maybe there could also be confounding variables as well? It ...
InquilineKea's user avatar
  • 2,317
11 votes
1 answer
2k views

Is Fluid Intelligence Dropoff With Age an Established Fact?

The picture below represents the idea that fluid intelligence declines with age. Is this commonly accepted as true and established, even if fitness/learning levels do not decline?
VSO's user avatar
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10 votes
3 answers
3k views

Does motivation and interest correlate highly with IQ and can someone be smart but perform poorly in a particular field?

Suppose a person is considered intelligent based on his IQ score. For example, suppose Bob has a high IQ score and is very interested in pure mathematics. He would most probably excel in this field. ...
intelligentguy122's user avatar
10 votes
1 answer
45k views

How are Raven's Matrices scores converted into age-adjusted IQ?

There are IQ tests based only on Raven's matrices. I wonder how a raw score on such a test is "scaled" to an IQ result. As we all know, IQ results depend on the age of individual tested. So ...
xemlmrx's user avatar
  • 103
10 votes
2 answers
236 views

Can emotional IQ be learned?

Can emotional IQ be learned? This question concerns both the general population and those with lower than average emotional quotients such as individuals with Asperger's, or Autism spectrum disorder ...
jiniyt's user avatar
  • 675
9 votes
2 answers
7k views

Does practicing Ravens Progressive Matrices tests inflate your IQ score?

I'm 16 years old and a year ago I got obsessed about IQ. I took a Raven IQ test and scored 115. Then during the autumn and winter of last year I took some more IQ tests using RPM and scored 126 on ...
ultraboss101's user avatar
9 votes
1 answer
6k views

Does IQ affect learning speed?

Supposedly, people of higher levels of intelligence do learn faster than people of lower levels of it. But this is an awfully coarse observation, and different people can learn at drastically ...
InquilineKea's user avatar
  • 2,317
9 votes
2 answers
4k views

Does schizophrenia cause a loss of intelligence?

Does having schizophrenia cause a loss of intelligence (as measured by IQ tests)? How does present research comment on this connection, if it exists? Furthermore, is it possible to recover from this ...
user avatar
8 votes
3 answers
2k views

What exactly is IQ, and how to develop or improve it?

Some people are said to have exceptionally high IQ. What exactly is that supposed to mean? Is it possible to develop high IQ if one doesn't have it? If yes, then how?
Aquarius_Girl's user avatar
8 votes
3 answers
2k views

Does learning (to play) music increase IQ?

In one fairly cited study by E. Glenn Schellenberg (~800 citations in Google Scholar) we find that Compared with children in the control groups, children in the music groups exhibited greater ...
the gods from engineering's user avatar
8 votes
2 answers
1k views

Is the Flynn effect in conflict with other studies of intelligence heritablity?

Studies comparing identical and fraternal twins, or occasionally identical twins reared apart have mostly concluded that there is a pretty high heritability of IQ. These studies, in particular the ...
clarkep's user avatar
  • 183
8 votes
2 answers
718 views

Does high IQ give cause to doubt an ADHD diagnosis?

My friend was diagnosed with ADHD as a kid, but her parents disagreed with such a diagnosis on the grounds that she had a high IQ which was discovered when her psychologists and psychiatrists were ...
Red Rackham's user avatar
8 votes
1 answer
4k views

How does raw IQ change over the lifespan at the group-level?

In the classic review of intelligence research (Intelligence: Knowns and Unknowns), Neisser et al (1996) write the following Stability. Intelligence test scores are fairly stable during ...
Jeromy Anglim's user avatar
8 votes
1 answer
910 views

How are the questions in IQ tests formulated?

I would like to know how psychologists come up with the questions they include in an IQ test and how they know that those questions will accurately measure intelligence? How has it been proved that IQ ...
KillaKem's user avatar
  • 183
7 votes
2 answers
42k views

Why does Asperger's Syndrome seem to overlap with high IQ?

A few of my friends have Asperger's Syndrome, and some fit the pattern but have not been formally diagnosed. Many of these friends are also highly intelligent, and because of the high intelligence ...
Nate Barbettini's user avatar
7 votes
2 answers
3k views

What does it mean for there to be more variance within groups than between groups in IQ?

I was watching a short YouTube video that comments on the validity of IQ. That video contains the following claim (verbatim): "You know nothing about a person's intelligence on the basis of his or ...
G-Cam's user avatar
  • 173
6 votes
2 answers
618 views

How do psychologists ensure they are measuring innate intelligence and not just education?

Certain groups perform worse on IQ tests than other. How do psychologists ensure that those differences aren't purely related to differing levels of education between those groups? How do we know ...
Calin Leafshade's user avatar
6 votes
1 answer
515 views

Is a low Emotional Intelligence (EQ) pathological?

A sufficiently low cognitive intelligence is generally considered in society to be inherently pathological, or at least very nearly so. In fact, until recently, a diagnosis of Intellectual Disability (...
Robert Columbia's user avatar
6 votes
2 answers
670 views

Is anything known about pygmy intelligence?

I read that pygmies split from other human lineages pretty long ago, before modern humans appeared. That, and the fact that they still remain hunter-gatherers, makes me suspect that they might still ...
Wolphram jonny's user avatar
6 votes
1 answer
598 views

How can IQ below 40 be measured?

Common intelligence tests such as the WAIS or RIAS don't differentiate well (or at all) in very low IQ ranges, making it impossible to diagnose the degree of mental retardation according to the ...
Randolph Eggerton's user avatar
6 votes
3 answers
1k views

Is the logic of "Herrnstein's syllogism" sound, and are its premises true?

Herrnstein (1973) wrote My theory hinges on an argument in the form of a syllogism: 1) If differences in mental abilities are inherited, and 2) If success requires those abilities, and 3) ...
user1205901 - Слава Україні's user avatar
6 votes
1 answer
682 views

Dyslexia and IQ

Background Information of my questions: At the age of eight I was "diagnosed" with Dyslexia, I am now 47. I went from not being able to read and barely able to write to a college reading level in 9 ...
Charlotte's user avatar
6 votes
3 answers
1k views

Can anyone provide a modern source for the average college student IQ of 115?

I've read in various places that the average college student IQ is about 115, and the various estimations of IQ by college major reached by converting SAT to IQ all use 115 as the starting point for ...
noeps's user avatar
  • 91
6 votes
1 answer
2k views

What is the correlation between Grade Point Average (GPA) and intelligence?

What is an authoritative empirical estimate of the correlation between pscyhometric measures of intelligence and Grade Point Average (GPA)? What are the main factors that influence the size of the ...
Jeromy Anglim's user avatar
6 votes
0 answers
6k views

How true are Jordan Peterson's claims on IQ tests?

Disclaimer: I am aware that this topic has the potential of becoming high political, but I have asked it nevertheless in order to receive some clarification on the subject. Please back all of your ...
Frank's user avatar
  • 61
5 votes
1 answer
1k views

How to interpret intelligence test scores for an individual who has taken a test multiple times in quick succession?

Specific context: A test subject took the same Raven's Standard Progressive Matrices IQ test three times and first scored 115, then 107, and finally 143. The same test was taken three times within 3 ...
Michael's user avatar
  • 162
5 votes
1 answer
652 views

Does sensory deprivation affect cognitive abilities?

I am wondering if the loss of vision or hearing early in life (say, before the age of 14 years) affects cognitive abilities later in life? I would imagine that as a group, early-blind or early-deaf ...
AliceD's user avatar
  • 20.6k
5 votes
2 answers
3k views

Are IQ scores above 200 statistically meaningful?

IQ scores are supposedly put on a normal distribution with a standard deviation of 15. The population of the world is about 7,674,000,000. So, if I know my statistics and made no numerical errors, the ...
onigame's user avatar
  • 296
5 votes
1 answer
417 views

Does Emotional Intelligence (EQ) demonstrate the Flynn Effect?

The Flynn Effect is a well-known phenomenon whereby Intelligence Quotient (IQ) test scores among the general public seem to rise over time. Does Emotional Intelligence (EQ) demonstrate the Flynn ...
Robert Columbia's user avatar
4 votes
2 answers
780 views

Raven Progressive Matrix: why's my chosen square wrong?

Source: Intelligence and How to Get It: Why Schools and Cultures Count (2009). pp. 7-8.   The example that the problem-solver must follow is set up by the two figures in the top row of the left panel....
user avatar
4 votes
2 answers
272 views

Can a shorter IQ test be devised that provides a more approximate measure of IQ?

Disclaimer: I am not a student of psychology, just an interested guy - but here goes anyway... IQ tests usually contain dozens of questions and take considerable time. I think this is because such ...
Adam's user avatar
  • 41
4 votes
1 answer
1k views

Does a non-knowledge based, or knowledge corrected IQ test exist, and what are its results per race?

If you google IQ gap race and open the google images, you will see many diagrams showing the differences. I went on some IQ test pages, and I noticed that the test includes mathematical ...
Toskan's user avatar
  • 149
4 votes
1 answer
175 views

Paper discussing economic rationale of IQ-based hiring practices

TL;DR I'm looking for a paper that explicitly quantifies the ROI an employer would likely derive if personnel selection involved intelligence testing and only those +2 SD in cognitive ability were ...
faustus's user avatar
  • 1,247
4 votes
1 answer
6k views

Is critical thinking associated with IQ?

I consider myself a person with reasonable intelligence. In my job, I require a lot of critical thinking. I am good at think laterally, but sometimes I feel I missed important critical evaluations of ...
thinker235's user avatar
4 votes
2 answers
3k views

How are IQ test scores affected by psychological stress or trauma?

Does mental stress or trauma have a significant impact on IQ test performance relative to baseline, and if so, how much? For example, if a person is affected by abuse, bullying, neglect, or some other ...
user2638180's user avatar
4 votes
1 answer
1k views

What does it mean statistically for there to be significant differences in average IQ scores between racial groups?

Charles Murray (in his book, "The Bell Curve") reported that there are real differences between the mean IQ scores of different racial groups. He also points out that IQ variation within said groups ...
froimovi's user avatar
  • 149
4 votes
1 answer
136 views

Handedness bias in Raven's Matrices

A few years ago I tried a Raven's Matrices IQ test on the Internet. In every test the bottom right element had to be deduced and this could always be done by scanning the first two rows to determine ...
Chris Barry's user avatar
4 votes
0 answers
144 views

High IQ and problem solving

Are there any studies, which shows that High IQ people are good or average or bad in problem solving/other professions? Need to know that High IQ correlates to very good problem solving skills or ...
SzD's user avatar
  • 41
3 votes
1 answer
870 views

How exactly do we construct perceived IQ by facial features?

There are claims that humans can recognize others' IQ. What's the difference between the below images that shows men's IQ? Personally, I can "feel" that the guy with high perceived intelligence (on ...
user4951's user avatar
  • 691
3 votes
2 answers
2k views

IQ Test stability longitudinal study

I am wondering if someone could direct me to a longitudinal study examining IQ test scores over time. For example, testing a group of test subjects every 10 years from age 5 to age 65. The reason I ...
user264125's user avatar
3 votes
1 answer
533 views

Are IQ tests "beatable"?

I have been watching a lot of Jordan Peterson's videos on YouTube recently. One of his themes is, that IQ is among the best studied metrics, with high predictability, validity and is generally ...
user1721135's user avatar