Teen Pot Use Kills IQ? New Study Says No
Socioeconomic differences may explain earlier findings: report
By Matt Cantor, Newser User
Posted Jan 15, 2013 1:33 AM CST
This Nov. 8, 2012 file photo shows marijuana plants flourishing under the lights at a grow house in Denver.   (AP Photo/Ed Andrieski, File)

(Newser) – Justin Bieber might not be as dumb as you think he is: Over the summer, word was that teen marijuana use could reduce IQ—but a new investigation rejects that initial study. Duke scientists, among others, had reviewed the IQs and pot habits of some 1,000 people in a New Zealand town between the ages of 13 and 38. They found that IQ scores sank among heavy users. But an Oslo researcher says differences in socioeconomic status could just as easily have explained the apparent IQ drop.

His study used a computer simulation to test how IQ scores could shift based on socioeconomic status, including education, income, and career. Trends in his findings matched those found in the pot study. He says he's not sure his study overrules the original one, but it points to potential flaws. The Duke team analyzed his results and say they're wrong, and outside experts say the original study hasn't been disproved beyond doubt, the AP reports.

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Jan 15, 2013 2:39 PM CST
dudes, all this talking about pot, pot,tobacco, alcohol, pot, ends up being an effective ad campaign. what about growing up, making everything legal and stop talking about it altogether. i bet THIS would keep people away from smoking and drinking more than the morons like american100 and all the preachers/physicians/teachers/parents in the world -and the police. remember, before the ban marijuana was unknown to the vast public. only after that it was outlawed it became so universally popular. what can i say, pure genius.
Jan 15, 2013 2:36 PM CST
A pot smoker, that has been dodging the (non-smoking) authorities for years, has a lower IQ? Go figure. The Mexican cartels don't have a chance against the guys who can piss clean in a cup I guess. How is it possible they are out maneuvering the non users? Border patrol only catches like 10%-15%.
Jan 15, 2013 12:24 PM CST
Oh, Justin Beiber is as dumb as we think he is, have you ever seen him having a normal conversation? Half the time he has no clue what is going on.