Neural Feedback Training as Therapy for ADHD?

jamesh asks: "I asked Slashdot (anonymously) a while back about my daughter, who has been diagnosed with ADHD. The Ritalin has made a lot of difference but things are still not quite right, and she has developed various vocal tics (grunting, odd little noises, words and so forth... think Tourette's Syndrome, only not nearly as bad), which is one of the side effects of stimulant medication. She's now a lot less of an outcast and appears able to better interact with other kids, but we're still looking at alternate treatments. It may be the trendy new thing, but we've now started down the road of neural feedback therapy. Does anyone out there have any experience in this treatment? First hand 'I've tried it once and it changed/ruined my life' anecdotes would be great, but if you have a child, friend or acquaintance who has been through this treatment, it would be really useful to hear about their experiences." We also discussed ADHD treatments in another related Ask Slashdot but I don't see any mention of such a therapy in that discussion. Has anyone heard of studies or reports on patients of Neural Feedback Therapy?

"If you haven't heard of it, the idea is that by attaching sensors to the head, brainwaves can be measured, and by providing visual feedback, you can actually train your brain to regulate its activity. An ADHD person supposedly has a brain which isn't very good at keeping itself in 'concentration' mode. In a child, the feedback takes the form of a game or in the case of an infant, a pleasing pattern on the screen (an infant would probably be treated for sleep disorders, not ADHD, in case you were wondering). When the brainwaves are in the 'right' state, the game proceeds or the patterns get prettier. When the brainwaves are erratic, it all slows down.

Because it is a trendy new thing, it's been put forward as a possible treatment for many other things including sleeplessness, epilepsy and other disorders, but one of the better successes has been in the treatment of ADHD.

The whole thing sounds quite plausible, but it is also quite expensive. All of the stuff I've read has been either from the suppliers of the treatment, or from people trying to discredit it."