Executive function disorder, which is what this article says marijuana causes, is also thought to be a much better name for ADHD. It is not much about hyperactivity or attention, but more a chronic lack of dopamine which affects the executive function system of the brain.

I find this interesting and wonder whether many stoners are self-medicating. I know I've smoked so much I've come to hate it and it's caused what I thought were long term memory and executive issues, yet I've recently been diagnosed with ADHD, to my surprise. Were I self-medicating, or did weed made a part of my brain worse? Honestly, I have no idea. I don't think there's an easy answer yet.