Neurofeedback (NFB), also called neurotherapy, neurobiofeedback or EEG biofeedback, enables an individual to train brainwave activity, as measured by electrodes on the scalp, via feedback of EEG information in the form of a video display, sound or vibration. If brain activity changes in the direction desired by the therapist, a positive "reward" feedback is given to the individual, and if it regresses, either a negative feedback or no feedback is given (depending on the protocol). Rewards can be as simple as a change in pitch of a tone or as complex as a certain type of movement of a character in a video game.
Neurofeedback has been researched and documented in various ways for more than 30 years. Below are some links to research studies, reference lists and other interesting information all related to neurofeedback
Efficacy of Neurofeedback Treatment in ADHD
Comprehensive Neurofeedback Bibliography
The Scientific Basis of NFB Training
A Comparison of NFB and Stimulant medication
10 year old stability of NFB Training
WISC changes following NFB Treatment