All Questions
Tagged with statistics intelligence
13
questions
2
votes
0
answers
31
views
Why did studies find a within-person correlation between IQ and agreeableness but not between-person?
Bartels, 2012 found a correlation of 0.21 in what I understand to be within-person correlations (when one trait increased throughout life, the other did as well), however the between-person ...
- 325
3
votes
0
answers
97
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 ...
- 31
0
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0
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66
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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 ...
- 21
1
vote
1
answer
295
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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 ...
- 63
3
votes
2
answers
708
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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 ...
- 201
2
votes
1
answer
6k
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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?
user19731
4
votes
1
answer
1k
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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 ...
- 149
4
votes
1
answer
91
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Multiple-stratum intelligence models
My question concerns the mathematics of multiple-stratum models, about which I've not found much that's quantitative, so excuse my inventing my own notation to explain my thoughts.
In models such as ...
- 201
2
votes
1
answer
2k
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What is the rationale for the normal distribution of intelligence?
What is the rationale for the normal distribution of intelligence?
I'm asking what the rationale is for saying that 68% of variance within intelligence falls within 1 standard deviation either side ...
user7852
2
votes
1
answer
1k
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Is it possible to calculate the probability of a child having an IQ in a certain range based on their parents' IQ?
For instance, if two parents have IQs of 160, can one calculate the probability that their child has an IQ over 160?
- 141
5
votes
1
answer
420
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Does Emotional Intelligence (EQ) demonstrate the Flynn Effect?
The Flynn Effect is a well-known phenomenon whereby Intelligence Quotient (IQ) test scores among the general public seem to rise over time.
Does Emotional Intelligence (EQ) demonstrate the Flynn ...
- 514
3
votes
0
answers
1k
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Where can I find the norms for Raven's Standard Progressive Matrices? [duplicate]
I've never had my IQ measured before. After some research I decided to take the Raven's Standard Progressive Matrix test. After Googling I found this Wikipedia page. This test was linked on the ...
- 131
9
votes
1
answer
50k
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How to calculate IQ score based on raw score and adjust for age?
I am having a hard time grasping how IQ scores are calculated. I think it has something to do with their age score ratio multiplied by 100.
Say I have a test that holds 30 questions. How would I ...
- 193