The Living Force
A heart rate variability monitor might do the trick? If the pulse is actually related to heart beat.I thought about that, but it seems that the 'feedback' you get is not in the form of an increase or decrease in your pulse but simply some kind of change or 'jump' or something in the pulse. The fact that it is different for different people is part of the problem of explaining it in a way that applies across the board. The idea is, apparently, that through practice you become familiar with the 'change' in the pulse felt in the finger, and that becomes your reference. But it would be cool if we could come up with something that read the changes in then patient's 'field' in a more clear way, but perhaps it's not possible and maybe not even desirable. I dunno. For some reason I was wondering if a quartz crystal tuning fork might work, but that's probably me just being new agey. Probably something more 'high tech' would be better.
Or maybe some muscle sensors could be wired up to provide some kinesiology/muscle tone type feedback?
It's possible that having some external feedback could produce faster learning and stronger treatments.