There is a good literature on this topic. Go to medline for assistance.
THe Journal of Neurotherapy has some excellent review articles.
In article <4l72v5$rcr at senator-bedfellow.MIT.EDU>, Amy-Marie Smith,Morgaine,,,6174371043 <amsmith at bill-the-cat> says:
>>>>I have heard, but not been able to confirm, that people with ADHD tend to spend a far higher than normal proportion of time in the theta-wave state. Have
>>amsmith at mit.edu>>