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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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31 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 ...
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Can some one operate 15 points lower during some part of the day and then return to normal?

Few days back I took an IQ test (online mensa norway) and found my IQ score to be 85. I actually had my IQ professionally tested 16 months ago by a psychologist when I was 18, and found out that I am ...
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1answer
22 views

Correlation used as explanatory device in ''The neuroscience of Intelligence'

I am currently reading Dr. Richard Haier's book The Neuroscience of Intelligence. I have a base knowledge of statistics, but I am confused about the following extract from page 80 (chapter 2.4): ...
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1answer
50 views

How is it possible for fluid iq to be anything besides effort

On an untimed test where you are given directions on how to solve progressive matrices there is no reason to fail the question besides the test being wrong or not following directions. How was iq ever ...
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60 views

How to improve domain expertise in mathematics?

First off, I want to say that I read several related questions about IQ and fluid intelligence here on Stack Community and I need some further clarifications about domain expertise. A few months ago I ...
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1answer
90 views

if IQ is inherited, is it from father or mother?

I think there is some research that IQ is inherited, but is it inherited more from the father, or mother, or both?
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Scoring of the Wechsler Nonverbal Scale of Ability

How is the global test score supposed to be computed based on the individual scores in the Wechsler Nonverbal Scale of Ability? Let's say the sub-test scores are A, B, C, and D. From there: how do ...
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1answer
70 views

Any research on IQ (general) and coping with abstract concepts?

Is there any good research on how general IQ correlates with levels of abstractions people can easily handle? I understand, that abstractions are different, but here it's probably enough to cover ...
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1answer
134 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 ...
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1answer
39 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 ...
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1answer
47 views

Impact of pre-college schooling on IQ (WAIS)?

Introduction I'll give context for my question from personal experience, but then I'll generalize my question so that it's broadly useful. When I was a child, my mother home schooled me. When I ...
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Was one my subtest score on a test battery invalid? [closed]

I realise this may be an unusual case, but long story short I managed to get hold of an intelligence testing software often used for job screening etc. Its called the MAB-II its modelled after the ...
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43 views

Is the relationship between IQ and brain processing speed/power? Is it linear, logarithmic or other?

Is the relationship between IQ and brain processing speed/power linear, logarithmic or other? For example lets say you two groups: Random group of 25 people each with an IQ close to a 100 IQ (95 - ...
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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 ...
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Is there a basic mathematical relationship between IQ and learning speed?

Is there a basic mathematical relationship between IQ and learning speed? ... such as linear, exponential, etc? For example, if some number of people with an approximate IQ of 100 (95-105) take X ...
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79 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 ...
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43 views

Cognitive ability and possible careers

I have a couple of times read articles saying something like "If you have an IQ of 130 you can become a physician, high school math teacher or lawyer. If your IQ is 95 you can work at a kindergarten, ...
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4k 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 ...
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2answers
102 views

How is intelligence in children measured?

Intelligence is dependent on mental age and education. So how can an IQ test be performed to check the mental/intellectual capabilities in children?
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2answers
138 views

Bounds on skew and kurtosis of IQ

The question of whether IQ is Normally distributed, or instead follows e.g. a Pearson type IV distribution, has been debated since at least the 1910s. The quotient- and deviation-based definitions ...
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89 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 ...
2
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1answer
471 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 ...
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2answers
217 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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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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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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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
61 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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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
123 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
1k 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
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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
2k 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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1answer
221 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
156 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
100 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
43 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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113 views

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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36 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
1k 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
690 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
529 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
284 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
364 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
326 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
138 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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2k 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
24k 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
198 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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183 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 ...