CHARLOTTE,NC--Smoking Marijuana may not be the cause of some stoners having lower IQ's.
Researchers took a second look at a landmark study that followed more than a thousand children into their 40's.
The original findings showed teens who smoked pot had lower IQ's as they aged.
A new study says that's because those kids were in lower status families, and ended up in less intellectually demanding enviorments as they aged.
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