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Heritability of intelligence
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142857
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Heritability of intelligence
I feel that intelligence is a combination of genetics and environment, with genetics being the stronger factor.
Any alternate views?
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| 10-16-2012 10:17 PM |
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Genesis
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RE: Heritability of intelligence
What would environment have to do with it? I'm just trying to get the clear picture here.... From what I known about Heredity and intelligence. I look at both sides of my family..... One side who has been in the rural Kansas Area... and the other that's been on the other side of the world. Out of both sides... I see different points of view.... My grandfather on the Kansas side has a strong liberal point of view because Mennonites don't agree with somethings such as War.... yet since I'm a mixture of both sides..... I just don't know if I am considered intelligent at all.....
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Eamus Catuli [Must we be normal?]
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| 10-16-2012 10:23 PM |
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Genesis
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RE: Heritability of intelligence
What would environment have to do with it? I'm just trying to get the clear picture here.... From what I known about Heredity and intelligence. I look at both sides of my family..... One side who has been in the rural Kansas Area... and the other that's been on the other side of the world. Out of both sides... I see different points of view.... My grandfather on the Kansas side has a strong liberal point of view because Mennonites don't agree with somethings such as War.... yet since I'm a mixture of both sides..... I just don't know if I am considered intelligent at all.....
I'm just more pessimistic than I used to be...
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Eamus Catuli [Must we be normal?]
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| 10-16-2012 10:25 PM |
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heterodox
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RE: Heritability of intelligence
I feel that intelligence is a combination of genetics and environment, with genetics being the stronger factor.
Any alternate views?
Ye olde nature vs nurture debate. The problem with intelligence is that a) intelligence is an abstract idea that we are not able to clearly define.
And b) It is not the quantity of intelligence that counts towards how intelligent you appear, it's what you do with what you've got.
That is down to nurture.
I'm surprised you've gone with nature. Perhaps when your kids have grown up you will see the full effect you've had on them and change your mind.
‘Just off the coast of Autonomy, across the Bay of Good Intentions, lies the fog shrouded Isle of Best Interests’.
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| 10-16-2012 11:21 PM |
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Yuji
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RE: Heritability of intelligence
The heritability of intelligence is a myth. Sometimes the smartest set of parents will produce a real letdown in the intelligence department. There's an example of this phenomenon right here. You're reading his post.
An Outcast Among Outcasts Since 1981
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| 10-17-2012 12:47 AM |
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Lang
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RE: Heritability of intelligence
Well, here's an article about [i]heritability[/] http://www.disabilityscoop.com/2012/09/2...ted/16538/
As for genetics, the going thought, so far as I know, is that genetics only accounts for the extreme outliers; a typical brain has a very flexible nature that allows a tremendous influence upon the skills leading to a decent score on the tests designed by white researchers living in the western hemisphere to determine a person's "intelligence."
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This post was last modified: 10-17-2012 12:54 AM by Lang.
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| 10-17-2012 12:53 AM |
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Lang
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RE: Heritability of intelligence
What would environment have to do with it? I'm just trying to get the clear picture here.... From what I known about Heredity and intelligence. I look at both sides of my family..... One side who has been in the rural Kansas Area... and the other that's been on the other side of the world. Out of both sides... I see different points of view.... My grandfather on the Kansas side has a strong liberal point of view because Mennonites don't agree with somethings such as War.... yet since I'm a mixture of both sides..... I just don't know if I am considered intelligent at all.....
It's not like the anti-vaxxers or the mercury moms. It's the development of a set of neural skills that the tests examine, such as pointing to birds or fences.
Chris Christie is so fat, I was giving a presentation and he ate my pie charts.

All human beings are born free and equal in dignity and rights. They are endowed with reason and conscience and should act towards one another in a spirit of brotherhood.
PROUD DISRUPTIVE DINGBAT
http://Siochanna.deviantart.com
http://neversubmit.xanga.com/
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| 10-17-2012 12:54 AM |
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Genesis
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RE: Heritability of intelligence
What would environment have to do with it? I'm just trying to get the clear picture here.... From what I known about Heredity and intelligence. I look at both sides of my family..... One side who has been in the rural Kansas Area... and the other that's been on the other side of the world. Out of both sides... I see different points of view.... My grandfather on the Kansas side has a strong liberal point of view because Mennonites don't agree with somethings such as War.... yet since I'm a mixture of both sides..... I just don't know if I am considered intelligent at all.....
It's not like the anti-vaxxers or the mercury moms. It's the development of a set of neural skills that the tests examine, such as pointing to birds or fences.
Oh....
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Eamus Catuli [Must we be normal?]
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| 10-17-2012 03:41 AM |
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Shnoing
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RE: Heritability of intelligence
...
I'm surprised you've gone with nature. Perhaps when your kids have grown up you will see the full effect you've had on them and change your mind.
When they've grown up, the "nurture" effects will be none. Children are able to camouflage during growing up, in case they are "cuckoo's eggs".
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| 10-17-2012 05:40 AM |
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142857
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RE: Heritability of intelligence
I feel that intelligence is a combination of genetics and environment, with genetics being the stronger factor.
Any alternate views?
Ye olde nature vs nurture debate. The problem with intelligence is that a) intelligence is an abstract idea that we are not able to clearly define.
And b) It is not the quantity of intelligence that counts towards how intelligent you appear, it's what you do with what you've got.
That is down to nurture.
I'm surprised you've gone with nature. Perhaps when your kids have grown up you will see the full effect you've had on them and change your mind.
I actually agree with you for the most part.
Functional intelligence is what made some of the kids I went to school with a lot richer than I am now, despite that (or more likely because) they worked their butts off just to get above average marks.
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| 10-17-2012 06:23 AM |
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marioluvsfries
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RE: Heritability of intelligence
I mostly think that I get my intelligence from my Dad's side of the family since my Mother's side did come from Oklahoma after all .... :/
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| 10-17-2012 06:33 AM |
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142857
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RE: Heritability of intelligence
The heritability of intelligence is a myth. Sometimes the smartest set of parents will produce a real letdown in the intelligence department. There's an example of this phenomenon right here. You're reading his post.
You cannot do statistics on a sample of one.
I'd disagree on at least two grounds. One, you seem intelligent to me. Two, if a 6.8" father and 6'4" mother produced a child who grew to 5'1" as an adult, that does not disprove that height has a strong genetic component among humans.
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| 10-19-2012 09:33 AM |
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142857
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RE: Heritability of intelligence
Other examples of IQ increase through early enrichment projects can be found in Israel, where children from a European Jewish heritage have an average IQ of 105 while those with a Middle Eastern Jewish heritage have an average IQ of only 85. Yet when raised on a kibbutz, children from both groups have an average IQ of 115.
From: http://iq-test.learninginfo.org/iq03.htm
This, of course, does not disprove that intelligence has a strong genetic component - but it does show that environment can influence intelligence quite significantly. I do wonder, as well, how much effect nutrition has on those statistics.
Large sample size studies in monozygotic (MZ) and dizygotic (DZ) twins raised together show an average correlation of .86 for MZ twins, while the correlation for DZ twins is only .60. Twenty-five years later, in The Bell Curve, Herrnstein and Murray [7] claimed that intelligence is strongly inherited with a heritability estimation of .60 + .2 within whites. Based on data from the National Longitudinal Survey of Youth (NLSY), a federal project testing over 10,000 youths in the 1980′s, they declared that social intervention had very little effect on IQ. A large group of scientists and researchers see this claim as racist.
From: http://www.scq.ubc.ca/the-genetic-basis-...elligence/
Twin studies have consistently shown a very strong genetic basis for intelligence.
Correlations between IQ and degree of genetic relatedness:
The relative influence of genetics and environment for a trait can be calculated by measuring how strongly traits covary in people of a given genetic (unrelated, siblings, fraternal twins, or identical twins) and environmental (reared in the same family or not) relationship. One method is to consider identical twins reared apart, with any similarities which exists between such twin pairs attributed to genotype. In terms of correlation statistics, this means that theoretically the correlation of tests scores between monozygotic twins would be 1.00 if genetics alone accounted for variation in IQ scores; likewise, siblings and dizygotic twins share on average half of their alleles and the correlation of their scores would be 0.50 if IQ were affected by genes alone (or greater if, as is undoubtedly the case, there is a positive correlation between the IQs of spouses in the parental generation). Practically, however, the upper bound of these correlations are given by the reliability of the test, which is 0.90 to 0.95 for typical IQ tests[41]
If there is biological inheritance of IQ, then the relatives of a person with a high IQ should exhibit a comparably high IQ with a much higher probability than the general population. In 1982, Bouchard and McGue reviewed such correlations reported in 111 original studies in the United States. The mean correlation of IQ scores between monozygotic twins was 0.86, between siblings, 0.47, between half-siblings, 0.31, and between cousins, 0.15.[42]
The 2006 edition of Assessing adolescent and adult intelligence by Alan S. Kaufman and Elizabeth O. Lichtenberger reports correlations of 0.86 for identical twins raised together compared to 0.76 for those raised apart and 0.47 for siblings.[43] These number are not necessarily static. When comparing pre-1963 to late 1970s data, researches DeFries and Plomin found that the IQ correlation between parent and child living together fell significantly, from 0.50 to 0.35. The opposite occurred for fraternal twins.[44]
Another summary:
Same person (tested twice) .95
Identical twins—Reared together .86
Identical twins—Reared apart .76
Fraternal twins—Reared together .55
Fraternal twins—Reared apart .35
Biological siblings—Reared together .47
Biological siblings—Reared apart .24
Unrelated children—Reared together .30
Parent-child—Living together .42
Parent-child—Living apart .22
Adoptive parent–child—Living together .19[45]
http://en.wikipedia.org/wiki/Inheritance...telligence
There are some prominent banners around the stats I've included from Wikipedia - there are some strong ideological factors regarding the acceptance or rejection of these sort of figures.
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| 10-19-2012 09:56 AM |
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Klaus Harmenstadt
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RE: Heritability of intelligence
Shouldn't that read 'Heritability of telligence'?
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| 10-19-2012 01:39 PM |
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Shnoing
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RE: Heritability of intelligence
... there are some strong ideological factors regarding the acceptance or rejection of these sort of figures.
That's what I like so much and find at the same time frightening about that question. If everyone who's above average (in a bertain field) gets cut off, where do we end?
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| 10-19-2012 10:30 PM |
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