HTTP/1.0 200 OK Content-Type: text/html Potheads Are Less Intelligent, Study Finds
Pubdate: Tue, 02 Apr 2002
Source: Province, The (CN BC)
Copyright: 2002 The Province
Bookmark: (Cannabis)


TORONTO (CP) -- It seems Hollywood isn't wrong when it portrays stoners as 
dumb. Heavy marijuana use does seem to drive down the IQ, by an average of 
four points, researchers from Carleton University report in the latest 
issue of the Canadian Medical Association Journal.

The decline appears to right itself after the dope smoker quits the habit.

"A negative effect was not observed among subjects who had previously been 
heavy users but were no longer using the substance," the researchers wrote.

"We conclude that marijuana does not have a long-term negative impact on 
global intelligence."

While the results are positive news for recreational marijuana users, he 
cautioned the findings are preliminary. His team is still studying the 
subjects to see if there is any impact on attention, memory or other mental 

As well, it's not clear the findings can be generalized across the full 
spectrum of marijuana users. These subjects are middle class with 
above-average intelligence, kids who don't regularly use other drugs and 
who are well nourished. The drug's long-term impact might not be the same 
on someone with a riskier lifestyle.

"In the real world out there, of course, the heavy users probably are 
poly-drug users, etc.," said the study's lead author, Peter Fried of 
Carleton's psycholgy department.  "And they may be at a greater risk and 
their IQ may not recover."
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