Skip to main content
13 votes
Accepted

What is the meaningful difference between someone with a 145 IQ compared to a 100 IQ?

As a general note, precision in measurement of intelligence declines as you move to more extreme levels. There is greater uncertainty in measurement in the 145 range than there is at the 100 range. ...
Jeromy Anglim's user avatar
12 votes
Accepted

Is Fluid Intelligence Dropoff With Age an Established Fact?

You are asking two very excellent questions. Is the decline in fluid intelligence commonly accepted as true? These days it seems generally accepted, that the trend is true. However, this hasn´t been ...
bucky's user avatar
  • 443
10 votes

Is there any evidence that fluid intelligence is malleable?

Is there any evidence of malleability of fluid intelligence? In the downward direction, definitely yes. There are many ways you can directly pull fluid intelligence downwards. Things like being ...
Eff's user avatar
  • 700
10 votes

Does practicing Ravens Progressive Matrices tests inflate your IQ score?

Yes, practice even as simple retest improves scores in matrices-like tests: Raven’s APM scores increase significantly on repeated testing without any targeted training (e.g., Bors & Vigneau, ...
got trolled too much this week's user avatar
8 votes

Is the Flynn effect autism?

The Flynn effect refers to the tendency over the last century or so for IQ scores to increase each generation by a few points. There is no link between vaccination and autism. It is pseudo-scientific ...
Jeromy Anglim's user avatar
8 votes

Is a low Emotional Intelligence (EQ) pathological?

Shortly , a low EQ is not a sufficient condition to diagnose a mental psychiatric disorder. This is the DSM-V Proposal for the Definition of Mental/Psychiatric Disorder All these features have to be ...
Fil's user avatar
  • 1,524
7 votes

Does learning (to play) music increase IQ?

Short answer The recent literature shows mounting evidence for beneficial effects of music on cognitive abilities. The big 'but' in the issue is how specific those effects are and whether they will ...
AliceD's user avatar
  • 20.7k
7 votes

What is the meaningful difference between someone with a 145 IQ compared to a 100 IQ?

Consider, a normal IQ score falls between the range 85-115 which is approximately 70% of the population (and only 15% of people have an IQ of 115 or above), while an extended average IQ range tends to ...
xMathFanx's user avatar
6 votes

Correlation between "mechanical aptitude" and IQ

Can you suggest me better literature? Am I using the wrong concepts? Are the references provided above "sufficient"? I recommend you take a step back and ask yourself what your question is, and ...
faustus's user avatar
  • 1,247
6 votes

How do psychologists ensure they are measuring innate intelligence and not just education?

Short answer Any intelligence test will be designed for a certain target population. That target population's score is set at an index of 100 for the standard IQ test. The same test applied to people ...
AliceD's user avatar
  • 20.7k
5 votes

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

Actually both these scores are telling you the same thing. They can both be interpreted as Very Good Results, and any finer level of detail is chasing noise. Some minimal google scholar searching ...
steveLangsford's user avatar
5 votes

Are IQ tests "beatable"?

Short answer: Yes, but it does not matter Long answer: Each question has some inner mechanism that you either know or you don't. Usually you should know how to do it, but you don't know, that you ...
Jan Ivan's user avatar
  • 151
5 votes

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

Even under your assumption that everyone would solve correctly every fluid IQ test given enough time, the test outcome measured as completion time would still tell us that some people solve it faster ...
got trolled too much this week's user avatar
4 votes

What, other than humans, can possess an IQ?

Short answer IQ tests are designed to compare individuals within a given species. IQ tests for other animals than humans have been devised, however, and give insights in the distribution of smartness ...
AliceD's user avatar
  • 20.7k
4 votes
Accepted

What does it mean for there to be more variance within groups than between groups in IQ?

"You know nothing about a person's intelligence on the basis of his or her skin color. That is just a fact. There is much more variance among individuals in any racial group than there is between ...
Jeromy Anglim's user avatar
4 votes

What does it mean for there to be more variance within groups than between groups in IQ?

In the video he is discussing some work of Charles Murray (not sure how familiar you are with it). In any case, the main point of your confusion comes from the difference between presence and size. Dr....
mflo-ByeSE's user avatar
  • 1,283
4 votes

Can a shorter IQ test be devised that provides a more approximate measure of IQ?

Yes, what you say is entirely possible. If precision is not as much of an issue, it is possible to devise a test (of anything, not just a test of IQ) which would return a score of, say, 115 plus or ...
Denis Cousineau's user avatar
4 votes
Accepted

Is the logic of "Herrnstein's syllogism" sound, and are its premises true?

Herrnstein's Syllogism, as shown above, comes from the 1971 article written for The Atlantic by psychologist Richard Herrnstein (Herrnstein, 1971). It argued that while socioeconomic status of ...
Eff's user avatar
  • 700
4 votes
Accepted

Paper discussing economic rationale of IQ-based hiring practices

I believe I know which paper you're referring to. My guess is the widely cited Schmidt & Hunter (1998) paper. The paper summarizes 85 years of practical and theoretical implications of research in ...
Eff's user avatar
  • 700
4 votes

Does a non-knowledge based, or knowledge corrected IQ test exist, and what are its results per race?

No, such a completely knowledge-free test has not been devised. Fluid intelligence (a component of IQ tests) is probably the closest thing to the claim of being "knowledge-free", but it isn't quite so....
got trolled too much this week's user avatar
4 votes

How can IQ below 40 be measured?

With great difficulty. I'm half-joking because I'm not totally sure, but the first observation is that DSM-IV also used these brackets, so the ICD-10 isn't alone. The DSM-IV definition utilizes ...
got trolled too much this week's user avatar
4 votes
Accepted

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

A quick look at your reference focussed on a meta-analysis of an intervention. Evaluating interventions is mostly about estimating the mean effect of an intervention. So, even if personality or ...
Jeromy Anglim's user avatar
4 votes
Accepted

Is anything known about pygmy intelligence?

Short answer: There are no such studies, but some pygmy children do learn math, and graduate from secondary schools. Note: From the point of view of genetic divergence, the Khoisan are more commonly ...
Arnon Weinberg's user avatar
  • 19.8k
3 votes

Does learning (to play) music increase IQ?

I found one 2017 meta-analysis by Sala and Gobet which is probably superior methodologically to the few non-systematic reviews found by AliceD. I say "probably" because the meta-analysis includes ...
got trolled too much this week's user avatar
3 votes

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

Statistical significance in this context is determined by: the underlying size of the group differences, the group sample sizes, and your threshold for statistical significance (traditionally .05). ...
Jeromy Anglim's user avatar
3 votes

Can emotional IQ be learned?

I don't know anything about those with lower than average.. BUT Emotional Intelligence can be learned. Read on: http://www.lifehack.org/articles/communication/7-practical-ways-improve-your-emotional-...
adrianlazar.tm's user avatar
3 votes
Accepted

Raven Progressive Matrix: why's my chosen square wrong?

It is a very simple question. In 1, three vertical lines were occupying the top space in the diamond. In the lower half of the diamond, half the space was shaded and the other half was unshaded. In 2, ...
Isaac Lung's user avatar
3 votes

Does practicing Ravens Progressive Matrices tests inflate your IQ score?

A general principle is that skill transfer is domain specific and based on common elements. So if you've learnt something about the Raven's items, I would expect improvement and skill acquisition ...
Jeromy Anglim's user avatar
3 votes

To what extent does AFQT correlate with IQ?

An answer is found in an official memo, albeit from 1980, where the correlation of AFQT with WAIS (no version specified) was stated as 0.8 based on a Army "fact sheet" from 1965; the details of the ...
got trolled too much this week's user avatar
3 votes
Accepted

Questions on Interpreting Factor Analysis Results and Scores

Is my approach in generating a distribution based on the samples' factor scores flawed? How do they do it in practice? I found this somewhat difficult to follow. But in general, you should be able to ...
Jeromy Anglim's user avatar

Only top scored, non community-wiki answers of a minimum length are eligible