Originally posted by: IAteYourMother
Are brains from Greece any different from brains around the world? Secondly, since it is a study done in a University Hospital, I'm hoping/partially assuming that the sample was chosen randomly, and thirdly, the sample size appears to be large enough provided the sample is somewhat normally distributed. Even so, the article states that it controls many other variables (although I'd like to know what) and thereby discovered that there were significant differences.
Anyways, it's definitely not hotly contested that marijuana affects your mind, and nearly everyone I know agrees that regular marijuana use over long periods of time would probably dumb you down... there's a reason why the potheads tend to be stupider.
And my assertion wasn't just based on common sense, it was based on my own personal experiences with other people
I'd be much more inclined towards a drug/psychological study from a Scandinavian country to be honest. Then again, I wouldn't go to Brazil for surgery, and there are plenty who are fine with that.
The thing I'm trying to get at - and I'm not trying to speak as an expert, but as someone trying to work my way through my own question/answer .. is that tests of intelligence and dexterity don't show any effect.
Look at the study again and look at the potheads you know.
I'm sure you know plenty of "dumb potheads" who have smoked less than 4 joints a week or for less than 10 years.
But even in people who smoked UP TO that quantity and frequency, the study did not find a significant decrease in intelligence or dexterity.
I'm not denying that marijuana can make people "blunted"

, but I think that what sober observers are taking as being "a dumb pothead" falls outside of the psychological scale that measures intelligence.
I am thinking of two possibilities.
1. We are all stupid in a "pothead" fashion. However, as soon as we know someone smokes, we ascribe this flaw of humanity as being "because they smoke pot".
2. Pot makes you into a "stupid pothead", but your stupididty, despite being apparent to all, is not measurable on a clinical scale. That's pretty deep, dude.