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Cognitive abilities of 11-years-olds are up to three years behind where they were in 1975.

uk.news.yahoo.com

21–30 of 30 posts

Re: Cognitive abilities of 11-years-olds are up to three years behind where they were in 1975.

#21
post #7

well part of it, is we don't need to rely on our brain as much any more. When my parents were in school you had to do complicated math in your head. Nowadays you get a calculator. Same for spelling, in 1975 you needed to be a walking dictionary. Nowadays we have spell checker. As far as kids are concerned, a lot more of their time is now "wasted" on TV and video games.

I agree that time on TV is a waste. Time on video games, not necessarily.

Re: Cognitive abilities of 11-years-olds are up to three years behind where they were in 1975.

#22
post #7

well part of it, is we don't need to rely on our brain as much any more. When my parents were in school you had to do complicated math in your head. Nowadays you get a calculator. Same for spelling, in 1975 you needed to be a walking dictionary. Nowadays we have spell checker. As far as kids are concerned, a lot more of their time is now "wasted" on TV and video games.

Because all problems in math and engineering have already been solved, and are programmed as calculator functions.

Re: Cognitive abilities of 11-years-olds are up to three years behind where they were in 1975.

#23
post #11

Earlier quoted context omitted.

Regarding the downmodding... discussing biological differences in the races is one of those Things You Can't Say ( http://www.paulgraham.com/say.html ). It's been discussed here before and it never goes anywhere. I would recommend letting it go. I am inclined to agree with you that this study is just as worthless as the ones comparing American students to foreign ones, but for different reasons. It's just about what…

You can discuss biological differences, but you have to do it carefully and extremely intelligently. Eugenics have been used by bad and tremendously ignorant people to do terrible things, and people are rightfully wary about entering the "biological difference between races," territory. In any case, we're talking about the exceptional students, so racial averages are irrelevant to the conversation.

>In any case, we're talking about the exceptional students, so racial averages are irrelevant to the conversation.

Nonsense. Assume intellect is normally distributed, with equal sigma to simplify things (1). Assume a racial difference in mean of 0.5 sigma, then 2.2% of the higher intellect group will be 2sigma beyond the (high intellect) mean, while 0.6% of the lower intellect group will reach this level.

This difference grows exponentially when we consider more exceptional people (2).

(1) Between males and females, sigma is not equal. Men have higher sigma, as Larry Summers famously hypothesized.

(2) To see this, write out the CDF for a normal distribution and use the asymptotic expansion for erf. The rate of growth is (smarter group's mean - dumber group's mean)/sigma^2.

Re: Cognitive abilities of 11-years-olds are up to three years behind where they were in 1975.

#24
This is a topic near and dear to me. I believe cognitive abilities are falling, but not for the reasons this article talks about. I believe vaccination may have a strong role to play, and the number of vaccine shots kids get (let's say by the age of 4) has gone up 5-10 fold in the last 25 years.

I have talked to a couple of immunology professors and they aren't really very comfortable with this mad rush to have a vaccine fix for everything.

This is a huge topic, but if any of you are planning to have kids, research this topic of vaccines. Do not blindly accept what your pediatrician says - they are not all that well-informed.

Re: Cognitive abilities of 11-years-olds are up to three years behind where they were in 1975.

#25
post #11

Does this take into account immigration to England? If not, it's as worthless as studies saying American students aren't on a par with students abroad. The question is, which American students we're talking about: the black ones or the white ones? The distribution of IQ among white students is on a par with that of other white kids in other places. The distribution of IQ among black students is less favorable. (This…

Regarding the downmodding... discussing biological differences in the races is one of those Things You Can't Say ( http://www.paulgraham.com/say.html ). It's been discussed here before and it never goes anywhere. I would recommend letting it go. I am inclined to agree with you that this study is just as worthless as the ones comparing American students to foreign ones, but for different reasons. It's just about what…

kids may do worse on some measures, but on average, in the age of Google, everyone is a great deal smarter than 30 years ago.

Statistics?

I see your point, but one must intellectually curious to make use of the vast pool of resources that is available. Google also allows mis-information to be more readily disseminated.

Re: Cognitive abilities of 11-years-olds are up to three years behind where they were in 1975.

#26
post #10
post #7

well part of it, is we don't need to rely on our brain as much any more. When my parents were in school you had to do complicated math in your head. Nowadays you get a calculator. Same for spelling, in 1975 you needed to be a walking dictionary. Nowadays we have spell checker. As far as kids are concerned, a lot more of their time is now "wasted" on TV and video games.

You still need to be able to do the maths in your head, otherwise how can you interpret what the calculator is telling you? Maybe your whole calculation is an order of magnitude out, for example. A calculator saves time , not understanding. The same is true of a spellchecker. Doesn't matter if every word is correct if no meaning is communicated. And even if it were true for the general population it wouldn't be true…

And math eventually becomes too abstract to calculate manually.

Re: Cognitive abilities of 11-years-olds are up to three years behind where they were in 1975.

#27

Earlier quoted context omitted.

You can discuss biological differences, but you have to do it carefully and extremely intelligently. Eugenics have been used by bad and tremendously ignorant people to do terrible things, and people are rightfully wary about entering the "biological difference between races," territory. In any case, we're talking about the exceptional students, so racial averages are irrelevant to the conversation.

>In any case, we're talking about the exceptional students, so racial averages are irrelevant to the conversation. Nonsense. Assume intellect is normally distributed, with equal sigma to simplify things (1). Assume a racial difference in mean of 0.5 sigma, then 2.2% of the higher intellect group will be 2sigma beyond the (high intellect) mean, while 0.6% of the lower intellect group will reach this level. This differ…

Assume intelligence is distributed proportionately to time spent thinking on hard problems, starting in childhood, which assumption is borne out by the biographies of many exceptionally gifted individuals, and things start looking very different, don't they?

Re: Cognitive abilities of 11-years-olds are up to three years behind where they were in 1975.

#28
post #16

this is what fluoridated tap water gets you... and aspartame

As far as I know, all fluor (and chlorine) does to water is keep it as free as bacteria as possible, and make your teeth stonger.

Is there any evidence of undesired effects?

Re: Cognitive abilities of 11-years-olds are up to three years behind where they were in 1975.

#29
post #16

this is what fluoridated tap water gets you... and aspartame

As far as I know, all fluor (and chlorine) does to water is keep it as free as bacteria as possible, and make your teeth stonger. Is there any evidence of undesired effects?

http://www.fluoridealert.org/health/brain/

be very afraid

Re: Cognitive abilities of 11-years-olds are up to three years behind where they were in 1975.

#30
post #29

Earlier quoted context omitted.

As far as I know, all fluor (and chlorine) does to water is keep it as free as bacteria as possible, and make your teeth stonger. Is there any evidence of undesired effects?

http://www.fluoridealert.org/health/brain/ be very afraid

You mean: be well informed.

Fear may motivate you to get informed, nothing else.

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