Questions tagged [iq]

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

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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
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
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10 votes
1 answer
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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
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
2 votes
1 answer
517 views

Is it possible to increase/train your intelligence? [duplicate]

Is it possible to raise your IQ (best correlate for g I know of)? Does brain training help? I have never taken a psychologist administered IQ test before, but I did take a reputable online IQ test ...
Tobi Alafin's user avatar
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
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
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
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
6 votes
2 answers
617 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
3 votes
0 answers
113 views

Any conclusive statement on the controversial book The Bell Curve

The Bell Curve: Intelligence and Class Structure in American Life, an empirical study arguing for IQ correlations with success, genes and race apparently sparked a big controversy in the US since 1992 ...
infatuated's user avatar
23 votes
1 answer
929 views

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
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
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
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
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
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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
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
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
3 votes
0 answers
1k views

Is there a scientific consensus on the cause of IQ gap by race? [duplicate]

On average, there is a 15 IQ points gap between whites and blacks. Is there a scientific consensus on whether this gap is explained by nature/genetics, nurture/environment, or both? This NYT article ...
mhmhsh's user avatar
  • 31
3 votes
1 answer
194 views

What, other than humans, can possess an IQ? [closed]

Dolphins and some birds (crows and parrots for example) are considered to be 'smart'. This made me thinking - What animals, other than humans, can possess an IQ, perhaps even at a very low level?
H chalmers's user avatar
2 votes
1 answer
406 views

If you can't draw, is that an indication of low spatial IQ?

People who can draw obviously can visualize space and objects in their mind. Therefore, people who can't draw obviously cannot. So does that mean that people who can't draw must have low spatial IQ?
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1 vote
1 answer
281 views

Why does IQ have a truncated normal distribution?

I know that the IQ statistic is designed to give it a mean of 100 and that you'll certainly never find someone with an IQ below 1 or above 300, but that tells us very little about the variance or ...
J. Mini's user avatar
  • 63
1 vote
0 answers
352 views

Is practice effect on matrix-based IQ tests largely attributable to question feedback?

I took the TRI-52, which is strongly correlated with other cognitive ability tests. When I first took it, I was tired, my mind was foggy, and my ADD was acting up -- I got a score of 116. The ...
omeed's user avatar
  • 11
1 vote
1 answer
146 views

IQ scores - fixed raw scores vs infinite tails of the underlying normal distribution of standard scores

When taking an IQ test, if a subject responds to all questions correctly, they will achieve the maximum (raw) score, a finite number. Yet, due to the test's normalisation that takes the median raw ...
z8080's user avatar
  • 919
0 votes
2 answers
661 views

Is there scientific evidence that IQ tests measure intelligence? [duplicate]

IQ tests are quite popular, but they seem to be lacking a scientific proof confirming their accuracy of measuring ones intelligence. No matter how hard I've searched I haven't been able to find a ...
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