Questions tagged [iq]

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

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85 views

Why are most psychological studies not controlling for IQ and personality scores of their respondents?

Consider for exemple the stereotype threat, of which a recent meta-analysis can be found here. People try to assess how can a stereotype might explain a difference between two groups. However, they ...
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Is intelligence and social disadvantage cumulative across childhood development?

The question is notwithstanding how IQ seems relatively fixed through the lifespan I think that's the same thing as asking the question independent of whether IQ has enough validity to scientifically ...
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What lies at the core of human brain's processing, is it a simple retrieval from memory or actual computation?

For example, let's say I am solving a tough Calculus problem, as is my friend. I have practised calculus problems for several months now. While my friend is new to it. So, I solve it easily while my ...
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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 ...
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67 views

IQ-EQ oscillation

I know a guy who was very smart in school and university and had a high IQ. For example, in middle school he used to read high school science and math books like they're nothing but he had low EQ and ...
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66 views

IQ Heritability: from father vs mother?

I think on Wiki here it is suggested that IQ is inherited to some degree. But I can't find scientific information on whether it is more inherited from mother or father? e.g. if both mother and father ...
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16 views

How is the weight of Weschler subscales calculated towards general IQ?

How do the Wechsler IQ (e.g. WAIS III) tests indices (e.g. verbal IQ, performance IQ) and sub-scales contribute to overall IQ? What are the weights of each? If a person scores above 99.9th (maximum) ...
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45 views

Is your fluid intelligence malleable in the positive side?

I was going through this and it struck me that your raw IQ reaches its peak somewhere between 18 and 21. I came across the following article which says meditation could be very helpful to boost your ...
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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 ...
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41 views

Is Flynn adjustment for IQ scores viable?

I was IQ tested with a test battery that was normed 27 years ago when i was 8 (WISC-R)(It was normed 27 years ago when I was 8). My Verbal IQ score was 122 and my Performance IQ score was 130. I found ...
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101 views

Validity of Open Online IQ test

I want to measure IQ of college students for a research project I am working on. After searching for valid IQ test for research that is also low cost/free, I came across this site-https://...
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83 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 ...
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How strongly does IQ correlate with intelligence as it's commonly understood?

What is the strength of the correlation between IQ and intelligence where by intelligence I mean the "performance of brain" - the general efficiency of solving mental tasks?
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Is there a consensus that there are racial differences in IQ scores?

I'm not asking whether the difference is genetic or environmental, or if IQ scores are a racist and flawed measure of intelligence. Is there a consensus that today, in e.g. America, there are ...
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Is AFQT geared towards estimating crystallized intelligence?

In a few papers I have read claims that AFQT is geared largely (mostly?) towards measuring crystallized intelligence. However, https://study.com/academy/popular/difference-between-the-asvab-afqt....
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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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56 views

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
33 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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59 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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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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127 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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What research is there into content of conversations vs IQ?

I wonder if there is any research into the content of a conversation between two people and how that relates to IQ. My casual conversations are that people of, lets say a more humble background, which ...
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1answer
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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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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
60 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
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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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49 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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319 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 ...
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62 views

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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200 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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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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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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113 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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269 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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105 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 ...
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1answer
606 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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300 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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305 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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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
65 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
133 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
2k 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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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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3k 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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267 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?