Questions tagged [iq]

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

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5 votes
2 answers
2k views

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 ...
2 votes
1 answer
67 views

What is the average IQ in Bangladesh or of Bangladeshis?

In July 2010, Richard Lynn wrote the following in their article "National IQs calculated and validated for 108 nations": "For example, there was no measured IQ for Pakistan, but there ...
2 votes
0 answers
26 views

How are answers on verbal IQ subtests evaluated?

I spoke to a clinical psychologist recently about how verbal subtests on IQ tests are evaluated. She said that answers regarding the meaning of a word were evaluated based on whether or not they were ...
0 votes
0 answers
33 views

Does an extrovert have an advantage over an introvert on the WAIS-IV Arithmetic subtest?

I guess yes, because an extrovert gets more exposure to verbal conversation and then is more able to remember what the proctor said on the Arithmetic subtest. However, someone else said that this is ...
0 votes
0 answers
33 views

Looking for the name of the cognitive skills test that includes a memory test involving the names of cartoon aliens

I took a cca. 60-minute-long cognitive test about 10 years ago but I can't remember its name (haha...) But I can remember a part that was a memory test involving cartoon aliens and another part when I ...
6 votes
2 answers
457 views

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 ...
3 votes
2 answers
2k 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 ...
1 vote
1 answer
391 views

Do people with ADHD typically underperform on IQ tests? [duplicate]

To me, there seems to be a great disagreement about what IQ is supposed to measure. I have heard about psychologists taking ADHD/depression/other mental illnesses into account when deciding on the ...
0 votes
0 answers
30 views

How do I increase my processing speed? [duplicate]

I have an IQ of around 90 (with 88 of that as reasoning IQ and 92 as performance IQ). I’m extremely worried about getting a job and doing well. Are there any exercises, medication, lifestyle changes ...
0 votes
0 answers
42 views

Which of IQ or personality traits best predict job performance?

IQ seems to be an important predictor of job performance (close to 0.6 correlation coefficient), see here. It is said that: "Evidence from more than 100 y of research indicates that ...
-1 votes
1 answer
178 views

Messy or fast handwriting related to high IQ?

Is any study that proof people with messy or fast handwriting have high IQ?
2 votes
1 answer
322 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?
10 votes
1 answer
45k views

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 ...
0 votes
0 answers
21 views

Hey does anyone know about scoring on Raven’s Advanced Progressive Matrices? [duplicate]

I Just did the test in 40 minutes and scored 31/36. I m 30 years old. What would be my IQ be? Or where to find info about the topic? Link here How are Raven's Matrices scores converted into age-...
3 votes
1 answer
476 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 ...
6 votes
0 answers
6k 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 ...
3 votes
0 answers
180 views

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 ...
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)...
1 vote
0 answers
494 views

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 ...
2 votes
1 answer
15k views

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 ...
11 votes
4 answers
7k views

Is there a correlation between high IQ and creativity?

Is there a correlation between high IQ for example over 125 and creativity? Is creativity improved or does its importance simply diminish? Maybe there could also be confounding variables as well? It ...
10 votes
3 answers
2k 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. ...
0 votes
0 answers
62 views

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 ...
3 votes
0 answers
85 views

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 ...
1 vote
1 answer
1k views

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 ...
0 votes
0 answers
90 views

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 ...
0 votes
0 answers
110 views

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 ...
0 votes
2 answers
458 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 ...
2 votes
2 answers
275 views

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 ...
4 votes
1 answer
1k views

What does it mean statistically for there to be significant differences in average IQ scores between racial groups?

Charles Murray (in his book, "The Bell Curve") reported that there are real differences between the mean IQ scores of different racial groups. He also points out that IQ variation within said groups ...
6 votes
1 answer
2k views

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 ...
0 votes
0 answers
66 views

What is the Reason Behind This Individuals Variability in Raven's 2 Clinical Edition Scores? [duplicate]

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 ...
0 votes
0 answers
53 views

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 ...
12 votes
2 answers
1k views

Correlation between "mechanical aptitude" and IQ

I am an economist working in labour market issues. It is common in my field to divide jobs between those who are intensive in "manual" tasks and those who are intensive in "cognitive" tasks (e.g. here)...
8 votes
2 answers
1k 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 ...
1 vote
1 answer
421 views

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 ...
2 votes
1 answer
72 views

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?
1 vote
0 answers
138 views

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 ...
-2 votes
1 answer
1k 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 ...
3 votes
2 answers
255 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 ...
1 vote
0 answers
297 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 ...
0 votes
1 answer
343 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 ...
4 votes
2 answers
704 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 left panel....
1 vote
1 answer
112 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 ...
3 votes
1 answer
64 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): ...
3 votes
1 answer
4k 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 ...
16 votes
2 answers
56k 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 ...
1 vote
0 answers
34 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) ...
2 votes
0 answers
95 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 ...
3 votes
0 answers
111 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 ...