Do the thick die quick?
WORLD OF SCIENCE - BOB BROCKIE
The Dominion PostRelevant offers
Scots psychologist Ian Deary claims that clever people live longer than thickheads.
Sure, some bright people die young and many thickheads live into old age but if you measure a large bunch of people the statistics point that way.
Dr Deary and his team looked at more than 2000 Scottish children given IQ tests in 1932 when they were 11 years old. He traced most of these people again in 1997 and found that those still living at age 76 had average IQs of 102 but those who had died had average IQs of 98.
Dr Deary says more evidence comes from IQ tests on large numbers of young men recruited into the Australian Army at the time of the Vietnam War and nearly a million 19-year-olds inducted into the Swedish Army.
Twenty years after the tests, those who had died in the meantime had lower average IQs than those who remained alive.
Several other surveys point in the same direction.
Some critics find Dr Deary's claims insulting. "So, you're saying that the thick die quick?" "Anyway", they challenge, "haven't IQ tests been discredited"?
"Well, no," says Dr Deary. IQ tests have a predictive value unequalled in psychology. Hundreds of data sets since 1904 show that IQ remains almost unchanged over a lifetime, can predict educational achievement, occupational success, propensity to sickness and age of death with some confidence. It's a better predictor of life expectancy than body mass index, total cholesterol, blood pressure or blood glucose.
But why IQ should be a good predictor of life expectancy remains a mystery.
Some epidemiologists suggest that intelligent people get the easy jobs, leaving the heavier, dangerous, life-threatening work to dumber people.
Or, they suggest, most people with high IQs behave better. In early life people with higher IQs are more likely to have better diets, do more exercise, avoid accidents, give up smoking, do less binge drinking and put on less weight in adulthood.
But Dr Dreary has checked all that stuff, and finds it does not wash.
Rather, he thinks, intelligence causes the association between education, social class and health.
He favours the theory that IQ tests in youth reveal a well-wired body better able to respond effectively to environmental insults.
Some supporting evidence comes from the finding that simple reaction speed – the time taken to press a button when a stimulus appears – can replace IQ test scores as an even better predictor of an earlier death. Reaction-time tasks don't demand complex reasoning, so are unlikely to improve by education.
Dr Deary hopes his findings will explain the connection between childhood IQ, sickness and earlier deaths and help to tackle problems of health inequalities. In Christchurch, David Fergusson leads a team studying the behaviour and fates of 1265 children born there in 1977. He has already shown that those with higher IQs did better at school.
If his study continues long enough, it may throw light on the connection between IQ and life expectancy of Christchurch kids.
Sponsored links
Never said an IQ of 102 was genius...just that nature was a stronger effect than nurture. You have said nothing that counters my arguement - (nor did I say that genius' were a result of Genetic mutations). If Nuture was the stronger influence then non-identical siblings would cluster extremely tightly together on IQ tests - they don't - but identical twins do...even when seperated.
Of course intelligent people live longer. The Darwin Awards have been proving this for years.
What does it matter? Everyone is different.Everyone has their own way of doing things.
IQ tests are heavily inaccurate anyways. Most of them are multi-choice where you still have a 1/4 chance of a correct answer just for a random guess. I still to this day do not consider an IQ test to be an accurate method of measuring intelligence, it is only good for relative purposes and even then for a less biased result, you should average the scores out over several tests.
Thankyou Mark and stewart for the laugh and mytery.Is stewart a flaming liberal who feels sorry for mark ? A rich mans son ? A big old positive capitalist who slogged thru to make it and by God we all better !? I love it.
Hey, go read his papers. It's a great study. And he could teach Stats 401 if he was't being an epidemiologist. He's tracked down all the Scots that sat the school test in 1932 (which was *all* Scots 11yr olds still in school - a pretty good sample!). He's retested them with the same test they sat then, to see if they were consistent (they were). He's given them the Stanford-Binet (so the Flynn effect isn't relevant - it's the same cohort). He's given modern kids the Stanford-Binet, and checked how it correlates with the 1932 test (pretty well, is the answer;). He's tracked all those 1932 kids through Scots death records (which are also very comprehensive). He's controlled for lifetime income, for educational attainment, for anything else he could measure in the survivors. And IQ predicts longevity really well...
If IQ is affected by different socio-economic circles, then its because some sectors of society still choose to drink piss and smoke drugs while they are pregnant and in the early stages of nurturing their offspring. And its not just the mothers.
Now, there is a potential link between class and potential IQ.
Well one thing's for sure: the people commenting aren't statistically representative of the general population! I reckon 95% of respondents are males, and 70% of them have done at least seventh form statistics or a first year university course in statistics or psychology.
My 2 cents: (a) I wouldn't question the researcher's ability to make statistical inferences. He's a PhD in statistics, and IQ is purely a statistical output. You could question whether the inferences are material or 'economically' significant (that's what we refer to in econometrics when an estimator is statistically significant but the coefficient is small enough to ignore). (b) IQ measures academic potential, and there's several other types of intelligence too (spatial, social, emotional etc) (yeah I did first year psych too). There are Dr's out there that are otherwise total retards in many common sense ways.
I wouldn't read too much into it, but I wouldn't get upset about it either (as that'd probably be more a reflection of frustration that one's IQ is stubbornly lower than they'd like theirs to be). It will be very interesting to see what all the other research underway suggests.
I find this all quite interesting, especially the revelation that people with higher IQs do better at school. Another recent study has discovered that people with higher IQs do better in IQ tests.
Another twitch in our race relations fidget
Golden Mile risks being tarnished if plans go awry
New bill has us searching for the truth
It's what you do with potential that counts
Obama's Pacific ambitions play well for sidelined New Zealand
The confusing signals teens must decipher
Do kids need tests? Answer the questions below
Simple pidgin offers everyone a mouthful of exciting subtleties
Let's drive buses off the Golden Mile
The perpetual problem of superannuation sustainability
There's false economy in this ACC measure
Nice Kiwi blokes - shame about the women
'Brainless' stunt by NZ 'idiots' a global sensation
Miley Cyrus tour bus overturns, one dead
Praying for Ben after explosion
Mother of separated twins: 'We don't want them back'
Kiwi Kevin Percy claims Harry Potter castle
Women pay top dollar for evening with bachelor
Nice Kiwi blokes - shame about the women
Rokocoko to play against All Blacks
As Henry shows, footballers can't be trusted
$450,000 march is political manipulation
Newest First
Oldest First
"I still to this day do not consider an IQ test to be an accurate method of measuring intelligence, it is only good for relative purposes and even then for a less biased result, you should average the scores out over several tests."
Alex, IQ is a meaningful construct and strongly predicts academic performance. If you doubt this, why do you think top scientists tend to have IQ's significantly above average? Why do you think physicians tend to have IQ's above average? If they were meaningless, then they could just as readily score below the mean. This doesn't happen.
While general cognitive ability and academic achievement are not isomorphic, the former is necessary for the latter, while the converse is not necessarily true.
If you don???t think I.Q. tests are valid as a way to quantify smartness then what do you think is valid? What methodology would you suggest? Where is your data? What hypotheses have you generated?
See Linda Gottfredson's faculty page for this paper dismissing a number of fallacies used to attack the tests.