Questions tagged [iq]

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

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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 ...
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What is the correlation between scores on Verbal and Culture Fair tests for Cattell III Scales?

Adults looking to join Mensa in Britain via sitting an entrance test offered by the organization, are able to sit two separately scored IQ test papers: Cattell III A , mean = 100 , SD = 16 Cattell ...
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Is there a negative correlation between IQ and likelihood of ending up stressed out by a certain task/job?

I searched for stress and IQ correlation research papers, but could only find ones claiming that stress lowers IQ - that's not exactly the same thing.
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What are the models/theories concerned with different in thinking types?

I have heard of the differences between analytical, synthetic and integrated thinking, often brought up as the qualitative differences correlated with IQ ranges, as opposed to the otherwise ...
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How reliable is this self-administered Mensa IQ test?

I found a Mensa challenge test, which can be taken for free on the Mensa website and involves answering 35 problems within 25 mins. They do mention that it is only for entertainment purposes, but ...
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If you can draw, is that an indication of high spatial IQ?

This is a spin off of this question: If you can't draw, is that an indication of low spatial IQ? In order to draw, you must be able to represent 3D objects in your head and rotate them in any ...
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How was the infant IQ test applied to Koko?

Apparently, a Gorilla named Koko took a number of IQ tests and scored an average of 80, their full range of scores being 70 to 95. The test used was the Cattell Infant Intelligence Scale. I don't ...
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Is there a significant cognitive difference between a person with 100IQ and a person 105IQ versus a person with a 150IQ and a person with a 180IQ?

So basically my question centres around cognitive differences by IQ classifications. So I saw somewhere (roughly) that the difference between someone with 150 and someone with 180 is very small ...
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Do different ethnic groups have the same standard deviation of the IQ distribution?

There is a lot of research suggesting that different ethnic groups either within US or worldwide if all plotted together would have distributions of IQ with different averages. The reasons for that ...
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How applicable is the correlation between high IQ and academic achievement in guessing a child's IQ?

IQ is a highly reliable (reliable in the statistical sense) psychometric, ie. several IQ authorised IQ tests administered by a licensed psychologist should produce similar/identical results. This does ...
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How is the mean for the Cattell IQ tests calculated?

British Mensa uses Cattell Culture Fair and Cattell III B tests. The Cattell Culture Fair Test has a mean and SD of 100 and 16 respectively. The Cattell III B has a mean and SD of 100 and 24 ...
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A primitive model or way of describing the "functionality" of intelligence

I spent quite a bit of time philosophizing about what intelligence actually (as in function-wise is) and I came to the conclusion that it consists of two (or so) properties Number of operations per ...
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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 ...
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Any ways to guesstimate IQ?

Is there any way to roughly approximate someone’s IQ simply based off of observing their behavior, mannerisms, speech, social interactions, etc? In other words, are their certain patterns of behavior ...
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What is the Reason Behind This Individuals Variability in Raven's 2 Clinical Edition Scores?

The Raven's 2 Clinical Edition developed by Pearson features an item bank comprised of questions numbering in the hundreds. Because of this each test differs from the other with possible combinations ...
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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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1 vote
1 answer
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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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In non-human animals, does general intelligence apply?

In humans, there is this concept of general intelligence, which says that if someone is smarter than you then they are smarter than you at all activities that rely on intelligences. Do other animals ...
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3 votes
2 answers
1k 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 ...
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1 answer
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How have mean raw IQ scores changed over time (e.g., over the last 100 years)?

I understand that by definition, the mean IQ is 100. And that over time IQ tests are updated to ensure that mean remains 100. But if IQ scores were not updated, what would mean IQ be now and how has ...
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Is a cognitive test invalid if self-administered?

Im talking about tests not designed for self-administration like the moca,wais etc. Could the scored potentially be deflated or inflated and misadministered thus making them invalid?
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What is the correlation between posting GIFs in group chats and IQ

recently several major Telegram channels I am member of have been heavily ostracizing people posting gifs in such channels, and claiming that it's a sign of retardation. I would not want to jump to ...
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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 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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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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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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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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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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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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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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1 answer
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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? [duplicate]

I'm not asking whether the difference is genetic or environmental, or if IQ scores are a racist and flawed measure of intelligence. i.e., I am not asking about causation. Is there a consensus that ...
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1 vote
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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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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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1 answer
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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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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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1 answer
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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 ...
3 votes
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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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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 ...
6 votes
1 answer
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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 ...
4 votes
1 answer
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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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1 answer
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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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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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2 answers
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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 ...