Excellent! This is the kind of response I was looking for...Somebody mentioned that a researcher in Estonia was doing research into PR and theta-waves. This would make a lot of sense. Thomas Budzynski, and a few others in the biofeedback world have done interesting work relating to theta-waves and "twilight states". These are states, normally associated with the phase inbetween sleep and wakefullness, that include hyper-suggestibility and subconscious access. That has been fairly well-researched. I think that, when and if the PR step truly works, it is associated with this type of theta-activity. As clarification I must mention that by theta-activity, brainwave researchers do not mean COMPLETELY THETA, instead they usually mean prominant theta- complete theta, with rare exceptions, means sleep. Often this Theta activity is facilitated and accompanied by Alpha brainwaves, thus complicating the issue.
I have been "lurking" around the webpages of the OpenEEG projects, which aim to build a basic EEG device with software interface for around 100 dollars. When and if they come up with a workable design I plan to build one myself. It seems that for some of this research I will have to engage in it on my own. However, being a student, I only have the requisite free-time over summer breaks and whatnot. Anyways, I encourage everyone to look into this, and if I do something myself I'll try to keep you informed.