anything else? I'd really like to see a study that includes a larger sampling than 14-19 year olds. Not that this study isn't impressive on its own.

I mean, just to consider your random sampling of 14-19 year olds, what are the odds that they're anxious, aggressive or irritable just because of where they're at in life, regardless of substance? Something pretty close to 60 percent or so one might guess?

Dare i ask for the study on adults that they seem to say they're comparing it to?