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Questions tagged [iq]

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

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110 views

IQ gap by race, truth or myth?

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 ...
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2answers
80 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 ...
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20 views

How is that Bell Curve can fit all the existing IQs exactly on the graph? [duplicate]

Bell curve is useful for many different branches of science, business, and economics. IQ is something that defines a person's intelligence. How is that Bell curve or Gaussian distribution can fit ...
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Can we generalise from loss of ability at arithemtic to pre morbid iq?

If a patient scores say 2 standard deviations less than expected at arithmetic, then how reliably can we claim the same of WM or FSIQ? It seems that the mean score for arithmetic, for the population (...
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37 views

Is it possible, on an individual level, that someones fluid intelligence can “spike” in ones early twenties?

I think IQ and fluid intelligence are interrelated enough that I can use them interchangeably. I was wondering if on an individual level, if it was possible that ones IQ can jump a certain amount of ...
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28 views

Predicting workplace performance of job applicants? [closed]

As an employer who interviews engineering candidates, I'm interested in using the state of the art findings in psychometrics/psychology to predict which candidates are the most likely to be successful....
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1answer
48 views

Questions on Interpreting Factor Analysis Results and Scores

I am trying to learn factor analysis and I thought it would be a good idea to try and very poorly "mimic" the computation for IQ scores with a dataset of dummy values as a way to "learn by example". ...
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47 views

Chess performance and IQ

Are there formal studies relating chess performance (e.g. ELO) and IQ? I found a proposed Levitt equation (also mentioned in thechessworld): Elo ~ (10 x IQ) + 1000 ...
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1answer
88 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 ...
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1answer
291 views

To what extent does AFQT correlate with IQ?

Wikipedia has a pretty non-informative page as to the nature of the (US) Armed Forces Qualification Test (AFQT) as it mostly talks of results ranges etc. What I could descipher from there is it that ...
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2answers
293 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 ...
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1answer
136 views

Is writing ability associated with IQ or intelligence?

Is greater ability to write well i.e. analysis of books/literature/research papers associated with higher I.Q. scores? Statistically speaking, is writing ability normally distributed like I.Q. is?
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Test which predicts success based on correlated answers to random questions?

I recall learning about an old test used (I want to say by Ivy League schools, and Harvard in particular) that would predict a student's success based on their answers to seemingly random questions ...
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1answer
63 views

Is pattern recognition a measure of spatial IQ?

Does pattern recognition come under spatial IQ, or is spatial IQ only to do with mental rotations and visualising?
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1answer
50 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 ...
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1answer
76 views

I have two different IQs; which one is the real one?

I took a WAIS IV and got a 128(SD15), but I have a somewhat large spread between Verbal(129) and Performance (122). The numbers may be off by 1 point or so. This was taken in a country and language ...
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1answer
32 views

What percentage of questions on Weschler Adult Intelligence Scale-IV 23 deal with environmental issues and climate change?

It is generally accepted that humans are the only intelligent species on the earth. I would submit that due to our proclivity to destroy the habitat that gives rise to our existence: we are the only ...
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75 views

Is IQ decided from birth?

I've recently viewed a few Chess matches from Judit Polgár and came across the discovery of her father, László Polgár's experiment where he theorized children can achieve strong accolades if they ...
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How can a country's IQ be different of 100, if the average IQ of a population is always 100? [duplicate]

In The Idiot Brain: A Neuroscientist Explains What Your Head is Really Up To, Dean Burnett write that: "the average IQ of a population is 100. Without exception. If someone says, “The average IQ of ...
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0answers
26 views

Are there dual-process IQ tests?

I mean tests that try to measure system 1 and system 2 performance separately, but more than short lists of trick questions which unfortunately seem to make the bulk of the empirical work in this dual-...
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1answer
176 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?
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3answers
281 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 ...
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1answer
178 views

IQ, Intelligence and Critical Thinking [closed]

I consider myself to be a very critical and analytical thinker. I can't help obsess over every little detail, consider various perspectives, use-cases, etc. I've been programming since a young age (...
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1answer
163 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 ...
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1answer
215 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 (...
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1answer
220 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 ...
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1answer
92 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?
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779 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 ...
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2answers
5k 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 ...
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2answers
90 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 ...
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0answers
121 views

Is it true that IQ and verbal ability are not much correlated?

I read that people with high IQ are not necessarily good or better speakers or writers. I wonder if that is true. I read that for instance left-handed people are overrepresented among high IQ people ...
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1answer
399 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) ...
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1answer
53 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 ...
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1answer
363 views

How to obtain adult norms for Raven's progressive matrices?

Raven's Progressive Matrices: is a nonverbal group test typically used in educational settings. It is usually a 60-item test used in measuring abstract reasoning and regarded as a non-verbal ...
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1answer
105 views

Is the Flynn effect autism?

I've seen a lot of claims related to this: Mild forms of autism increase IQ IQ scores abruptly increased after 1979, when the MMR vaccine was introduced The Flynn Effect was mainly on nonverbal IQ ...
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0answers
99 views

Where can I find a real, reliable, iq test that someone could take multiple times?

I'm trying to find a real, reliable, accurate IQ test, that someone could take multiple times (so maybe has randomized questions?). It is for a study involving IQ and video games.
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2answers
154 views

Problem with IQ tests in Murray's “The Bell Curve”?

Murray's The Bell Curve came up in a discussion recently. I have a very clear memory of reading a review of the book at the time it came out. The reviewer claimed that one of the many problems with ...
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840 views

Where can I find the norms for Raven's Standard Progressive Matrices?

I've never had my IQ measured before. After some research I decided to take the Raven's Standard Progressive Matrix test. After Googling I found this Wikipedia page. This test was linked on the ...
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1answer
1k views

Does anger lower a person's cognitive ability?

For me it seems that getting angry or irritated makes me less intelligent but it didn't try testing it. Has there indeed been such tests or anything else about testing IQ levels of different moods for ...
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3answers
539 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 ...
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2answers
464 views

Relationship between processing speed and IQ in twice exceptional children

How come some twice exceptional children (i.e., intellectually gifted children who have some form of disability) have high iq, but low processing speed? Isn't processing speed a factor of intelligence?...
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242 views

The disadvantages of high IQ [closed]

Some disadvantages about being intelligent are supposedly: 1. You make conclusions too fast 2. If you insist on logic, you must work as an engineer because nobody else cares about logic. 3. You have ...
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0answers
72 views

Any research into “intelligence” really out of sync with iq? [closed]

Is there any research into school children who routinely perform say two standard deviations worse on iq testing, than at school or even other intelligence tests? I'm not interested in explaining it ...
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2answers
3k 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 ...
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2answers
371 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 ...
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2answers
20k 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 ...
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1answer
401 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 ...
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1answer
401 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 ...
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2answers
302 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) ...
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1answer
730 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 ...