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Pot users show drop in IQ from adolescence to adulthood

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Pot users show drop in IQ from adolescence to adulthood

Old 08-28-2012, 01:03 PM
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Default Pot users show drop in IQ from adolescence to adulthood

While smoking pot is sometimes touted for its ability to dull pain, research has emerged showing that it also significantly dulls the mind – especially in teenagers.

A new study of more than 1,000 children in New Zealand, following them from birth to the age of 38, found that those who began using cannabis during their adolescence showed a decrease in their general intellectual inability, as measured by IQ tests, from childhood to adulthood.

A person's IQ - or intelligence quotient - does not measure a person's amount of knowledge, but rather represents a person's ability to comprehend concepts, as well their capacity to process information. Typically, IQ does not change significantly over the course of a person's life, unless as a result of severe brain damage from trauma or disease.

Although previous research has found adolescent cannabis use to have an effect on IQ, this is the first study to rule out pre-cannabis performance explaining the results. Researchers initially tested the participants at the age of 13 – before they began using cannabis – ultimately comparing this IQ to later tests throughout their adulthood.

While drug tests were not used in this study, detailed questionnaires given to the participants at five different ages throughout their lives helped to establish their marijuana use.

“We assessed cannabis use in two ways,” the study's lead author Madeline Meier, of the Department of Psychology and Neuroscience and Duke Transdisciplinary Prevention Research Center at Duke University, Durham, told FoxNews.com. “At [various] ages, they were asked to go back and report for that past year how frequently they used cannabis. They were also given diagnostic interviews, where we diagnosed cannabis dependence. Dependence generally reflects someone who has been using cannabis and experiencing health, social and/or legal problems – but are still continuing to use.”

Each individual was categorized into one of various groups depending on their cannabis use and dependence. The two main groups the researchers focused on were adult-onset cannabis users and adolescent-onset cannabis users. Adolescent-onset was defined in two ways – dependence on cannabis before the age of 18 or weekly cannabis use before 18. Adult-onset was defined the same way for after the age of 18.

Upon determining the age of cannabis-use onset, the researchers then analyzed the participants’ various IQ tests to establish trends in intelligence over time. For adult-onset cannabis users, there was ultimately no change in their IQ over time. But individuals who started using cannabis between the ages of 13 and 18 experienced an average IQ drop of eight points.

Not only did intelligence decrease, but the changes seemed to be permanent. Quitting or toning down cannabis use did not help adolescent-onset cannabis users to recover their lost IQ points.

According to Meier, an eight-point drop may sound small, but it can actually be a significant decrease with lasting effects.

“Take an average person – an IQ of 100 puts them in the 50th percentile of intelligence,” Meier said. “If this person loses eight IQ points, it drops them down to the 29th percentile. IQ is a strong determinate of a person’s access to college education, getting a job, performance on the job, tendency to develop heart disease. So those individuals who lose IQ points may be disadvantaged toward the most important aspects of life.”

While the results may be staggering, Meier said there is still much work to be done. The researchers did not determine how much cannabis a person needs to use in order to impair intelligence, as well as the age range that is most vulnerable. However, Meier feels that future research should focus on cannabis use during the onset of puberty – a crucial time for the brain’s development.

Even though more information is needed to establish the exact effects of marijuana on the developing mind, Meier noted it’s important for adults and teenagers alike to have a better understanding of just what cannabis does to their minds and bodies.

“[People] really need to be aware that cannabis isn’t harmless for adolescents,” Meier said. “2011 was the first year in which adolescents smoked more marijuana than cigarettes. They’re getting the message that cigarettes are dangerous and that marijuana is not. They need to understand that it is not harmless.”
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Old 08-28-2012, 01:05 PM
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This explains much.
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Old 08-28-2012, 01:27 PM
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That's a bunch of prairie fritters.
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Old 08-28-2012, 01:47 PM
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Good post Gator.

Wonder where the study is for alcohol? Or any other mind altering drug used by a developing brain?...Ritalin etc.?

You do any kind of drug consistently as a kid, well you get to hang out with dumb and dumbererer. Really easy to understand.
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Old 08-28-2012, 01:51 PM
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Originally Posted by swifty View Post
You do any kind of drug consistently as a kid, well you get to hang out with dumb and dumbererer. Really easy to understand.
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Old 08-28-2012, 02:06 PM
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I can't understand what you are saying.
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Old 08-28-2012, 02:20 PM
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Originally Posted by Capt.Willie View Post
This explains much.
Explains what? What are we talking about?
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Old 08-28-2012, 02:23 PM
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i was told there'd be no math
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Old 08-28-2012, 02:25 PM
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Dave's not here man.
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Old 08-28-2012, 02:31 PM
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I wantcha to meet my good friend over here... he's a little slow at times. We call him "Dime Bag."

This also explains, perfectly I might add, why Sean Penn is such an absolute douchebag today. Dain bramage!!!
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Old 08-28-2012, 02:45 PM
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Could this be a result of what happens when.......well you know........



Sad.


.
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Old 08-28-2012, 02:49 PM
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YEOW

Chicken and egg

Was she fug up before the ganja or after

I suspect well before

But she's pretty cool either way
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Old 08-28-2012, 02:53 PM
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Well that might explain the White House situation......
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Old 08-28-2012, 02:57 PM
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And the obesity epidemic is due to the munchies??
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Old 08-28-2012, 03:49 PM
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Originally Posted by meatdog View Post
Dave's not here man.
No man. I'm Dave, open up I got the stuff.

The OP was waaaaaaay too long. Too many big werds two.
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Old 08-28-2012, 03:51 PM
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twooo many werds an know picters......



.
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Old 08-28-2012, 04:00 PM
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Originally Posted by 240 LTS View Post
Could this be a result of what happens when.......well you know........

http://www.youtube.com/watch?v=-NYaUc4qvDM


Sad.


.
yes, it could be the result. but so could this:

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the "marijuana is evil/dangerous" argument is ridiculous
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Old 08-28-2012, 04:30 PM
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So, did they test these people when they were high? I don't think anyone ever thought getting stoned was intelligence enhancing.

How smart is someone after several Crown Royals? I know of 2 people that died from alcohol induced brain damage (brain dead). I also knew someone that had her esophagus "burst" and she drowned in her own blood. And, the list goes on................

I know one thing, if I wasn't subject to random pee/blood tests, I'd consider pot for my pain.
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Old 08-28-2012, 04:35 PM
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Originally Posted by toyguy View Post
yes, it could be the result. but so could this:



the "marijuana is evil/dangerous" argument is ridiculous
But he had determination, and discipline in training to achieve a goal.
I don't think Nana has a drop of that.



.
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Old 08-28-2012, 04:40 PM
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Imagine someone paid for this information,

right up there with the study last week that the US funded that say's "looking at food makes you hungry"
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