13
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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. ...
- 30.6k
12
votes
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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 ...
- 443
10
votes
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What are the IQ correlations between relatives?
Recent studies on this topic deal with more detailed questions, that are analysed using structural equation models (Deary et al., 2006). A main goal has been the identification of specific genes. No ...
- 116
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 ...
- 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, ...
- 10.1k
7
votes
Accepted
Does high IQ give cause to doubt an ADHD diagnosis?
Sounds to me like someone is making a logical fallacy here, though the origin of this fallacy isn't clear to me.
We cannot go from 'poor academic performance', to 'not amounting to anything', to '...
- 3,692
7
votes
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Why Bayesian Cognitive Modeling?
Here's a quick answer from general background knowledge, not from any specific knowledge of "Bayesian Program Synthesis (BPS)"
In general, Bayesian models can use strongly informed priors or diffuse "...
- 311
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 ...
- 71
7
votes
What is the rationale for the normal distribution of intelligence?
Short answer
IQ scores are distributed normally, because they follow the central limit theorem.
Background
When we measure IQ scores in sufficiently large populations, they will be normally ...
- 20.5k
7
votes
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How is the g-factor of intelligence calculated?
PCA or EFA: A standard approach to calculating a g factor would be to use principal components analysis (PCA) or exploratory factor analysis (EFA). Basically, you administer a broad battery of ...
- 30.6k
7
votes
Is there a theoretical maximum for IQ?
There are a few ways that you could answer this question.
First, IQ is defined with a mean of 100 and a standard deviation of 15. But this is a normative score and relative to a given target ...
- 30.6k
6
votes
Accepted
What is the correlation between self-rated and objective measures of intelligence?
The term you are looking for is self-assessed intelligence (SAI) (sometimes subjectively-assessed intelligence or self-estimated intelligence). The leaders in this field are Tomas Chamorro-Premuzic ...
- 19.3k
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 ...
- 1,247
6
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A doctor told me that cephalic index can be used to measure human intelligence, is it true?
No, the index and its correlation to intelligence is not strong.
See the medchrome.com description on cephalic index:
The underlying assumption of craniometry is that skull size and shape
...
- 434
5
votes
Accepted
Can a person be brilliant even though slow at resolving problems?
An otherwise 'brilliant' person can be slow at solving certain problems, yes. And no, cognitive performance is not the same thing as running a marathon. A marathon measures your ability to reach a ...
- 3,692
5
votes
What is the scientific support for Einstein's claim about the negative effects of reading too much?
I think what Einstein had in mind is that in order to come up with original ideas one must keep a balance between knowledge and creativity, as already stated by Jeromy Anglim.
In a paper titled "The ...
5
votes
Does schizophrenia cause a loss of intelligence?
Regarding schizophrenia and loss of IQ:
I don't know how much we can say about the 'loss' of IQ in schizophrenia patients. If anything, it appears to me that a decrease in overall IQ is augmented by ...
- 3,692
5
votes
Accepted
Is it possible for any arbitrary able bodied human to develop exceptional cognitive talent & genius across multiple disciplines?
Can any arbitrary [able bodied] human become a genius across multiple
disciplines or at least one discipline assuming that they have some
Secondary Eduction in these disciplines?
No, not all able ...
- 1,113
5
votes
Do children inherit intelligence from their mothers and not their fathers?
The psychology-spot article mostly links to researches done on mice. Only three links are about human genetics. One is philosophical in nature, other two deal with mental retardation. This study says ...
- 404
5
votes
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How can tacit knowledge be measured?
Short answer
Because tacit knowledge is defined as knowledge we cannot describe, researchers apparently adopt a strategy of just interviewing and listening for signs of tacit knowledge, as far as I ...
- 20.5k
5
votes
Do stimulants increase the IQ tests score for everyone?
IQ in ADHD sufferers indeed increases with the treatment of stimulants, such as methylphenidate (Meyes et al., 1994). This is thought to rely on the attention-narrowing effect of stimulants, i.e., ...
- 20.5k
5
votes
Accepted
Which computer video games can improve intelligence, barring Medal of Honor?
This paper by Shams, Foussias, et al. (2015) gives a good meta-analysis of studies that have been conducted on the effects of video games on intelligence. Some games described as improving cognition ...
- 321
4
votes
Does masturbation in men negatively affect cognitive processes?
Masturbation in men or women does not negatively affect cognitive processes
As I pointed out in another question in Health.SE, masturbation was a diagnosable psychological condition until DSM II in ...
- 12.1k
4
votes
What is the optimal exercise regime for improving cognitive functioning?
Yes, there are several studies which found links between the amount of training and the effect of it on cognitive abilities. See the below for references and summaries of some of these:
Jaeggi, ...
- 1,113
4
votes
Why do men have greater variance than women in mental test scores?
I've heard two theories related to genetics. Mental traits are massively polygenic (many genes with tiny effects). Men (XY) do not have a duplicate X chromosome like women (XX), which means that ...
- 1,498
4
votes
Free online intelligence test with norm table, high reliability, and must be printable?
I just found out about ICAR.
The International Cognitive Ability Resource is a public-domain
assessment tool which aims to encourage the broader assessment of
cognitive abilities in psychology ...
- 30.6k
4
votes
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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 ...
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