The study is flawed. [Quote]Before the tests were performed, all participants had to abstain from marijuana for at least 24 hours.[Quote]

If I asked people who were regular, heavy caffiene users to abstain from caffeine for 24 hours and then tested their cognitive skills against a control group guess what might happen?

Would that mean coffee drinkers had poorer memory then non-coffee drinkers? Would that further imply that Seattle is a town full of lost souls who can't remember where they put their car keys, or their wife?

Or what if I had all the groups abstain for 30 days or more, then did the testing?

And 4-5 J's a week? Now would that be all on Friday and Saturday? Or would they be spaced out over the week? Maybe people who have the time to smoke all week were stupid to begin with. Maybe if they looked at weekend use only they would have had different results.

This is a poorly designed study, done by people who should have known better.