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Twins Study Finds No Evidence That Marijuana Lowers IQ In Teens (sciencemag.org)
sciencehabit writes: Roughly half of Americans use marijuana at some point in their lives, and many start as teenagers. Although some studies suggest the drug could harm the maturing adolescent brain, the true risk is controversial. Now, in the first study of its kind (abstract), scientists have analyzed long-term marijuana use in teens, comparing IQ changes in twin siblings who either used or abstained from marijuana for 10 years. After taking environmental factors into account, the scientists found no measurable link between marijuana use and lower IQ.
It was likely survey based. I.e. they found identical twins and asked them if one used and one didn't, and if so, they evaluated them afterwards.
Anyways I'm kind of disappointed that they only looked at IQ, as to me it's a meaningless figure whose only purpose is for "I am more smug than thou art" clubs like Mensa. I'm more curious about other functional measurements both physiologically and sociologically (i.e. how did they vary in terms of career success.) There's some evidence that marijuana can improve both, as well as evidence that it can harm both.
Very smart people are not always very motivated people. And vice versa.
Take politics as an example.
There are two types of people in the world: Those who crave closure
And if drugs policy is to be based on facts then this sort of fact is just one more reason to give it up already and let adults decide what plants they'd like to benefit from.
Indeed. There is a real problem when the biggest detriment that people can identify for using an illegal drug is the very fact that it's illlegal. When the primary concern isn't that the drug will kill you, put you in the hospital, give you organ damage, make you crazy, or make you dependent upon it, but is instead that you'll be fined or tossed into jail, something has gone horribly wrong.
When you have people taking 'bath salts' instead of cocaine, which has a much higher chance of, I don't know, chewing somebody's face off, because the latter is illegal as well as the former, but the 'bath salts' are more accessable for those that would use drugs, we have a problem.
I don't read AC A human right
The "safety" argument relative to drug legalization is huge red herring designed to drag legalization proponents down the path of needing to claim that marijuana is safer than tap water, or worse, into wild and unproven claims of its medical benefits.
The results of marijuana's relative safety have been in for years -- you can't really overdose on it and decades of mass use have failed to show any significant signs of problems in the general population. This is more than we can say about alcohol, acetaminophen, anti-depressants and whole long laundry list of substances that are legal and easy to get.
The REAL argument is that the public policy of marijuana criminalization has been an abject failure. We've spent trillions of dollars on prohibition on it and all we have to show for it is a complete dismantling of our constitutional rights, corruption of a law enforcement system that has produced an epidemic of civil rights abuses quite often enabled by the elusive pursuit of marijuana users (you didn't think they wanted to stop you for a traffic offense, did you?), an erosion in public respect for laws, almost certainly a disregard for the graver risks posed by other illegal drugs, and a criminal justice system that has ruined thousands of lives and built massive criminal enterprises
What we don't have to show for it is any reduction in marijuana use or availability. As a matter of public policy it has failed in its goals and produced a plague of horrific side effects.
This is the argument that needs to be made. The safety issue is a total and complete distraction.
No, most of us aren't familiar with your anecdotes.
It's a sad comment on our society where we are so worried that there might be some natural substance that makes people feel good that before an effective drug can be approved the feel-good properties have to be removed.
You are welcome on my lawn.