Usually i find that after i smoke and go to sleep i have the weirdest stupidest dreams. Like the time i was desperatly trying to find the ocean because i couldnt breathe on land. Other than that weed definitly helps me sleep. Oh and the study quoted above is probably inaccurate, like most studies are, because you do not know those students cappibilites before they started smoking marijuana. The stoners I know are some of the most intellegent, educated, articulate people I know.