Doe, do you know anything about Nevzorov? I saw him riding on youtube, I visited his website and know that he doesn't wear anything on horse's head and that's all. I have never found anything about training method, just saw some results.
Hoo Hoo Alexander Nevzorov. Yes indeed. Now there's a pill that's very hard for many people to swallow. Eccentric is an understatement. Also very very commonly misunderstood. Simply because he approaches everything in a way that appears very clandestine. (perhaps its a Russian, ex-military, ex-politician kinda thing
He used to ride with a bit and spurs etc like any dressage rider.Then he moved to riding brideless as you have seen in the videos, but only when the horse can maintain collection to support the rider. Now he has moved away from riding altogether,and if you follow NHE (Nevzorov Haute Ecole) then you have to agree not to ride your horse either. This is because they are heavily involved (along with his wife and a few other members) in researching the physical impact on the horse. Due to their findings they state that it is impossible to ride a horse without causing pain and permanent damage. They are opposed (actively through magazines and videos) to any equine sports, and horses must not be shod.
Their aim is to continue to develop the horse physically without a rider and also look to its mental development (such as recognising Latin).
Their approach is very challenging, and requires huge patience. Its certainly not negative reinforcement, but its not simple positive reinforcement based either. For example early exercises will include asking the horse to pick up a brush and pass it to you or suchlike (though it will be working with what the horse offers) to establish communication. This cannot be done in the usual clicker type way however, that is notthe point of it. Then you can proceeed to various stretches, such as the trestle etc. These are how they develop the communication and strength to move to the levade, piaffe etc. from the ground.
In terms of a body many see it as clandestine. He does have a magazine etc but otherwise theres not much he sells. To be part of the NHE you can join a forum but then you have to be invited to the 'school'. Invitation is following demonstration of the principles with your horses over time. There are no costs involved.
Probably the easiest way to get a handle on it is to read an ebook by one of his representatives - Michael Bevilacqua. Its called 'Beyond the Dream Horse' A Revealing Perspective on Attaining a true Relationship. He's canadian and came from a background of trying the other NH methods such as roundpenning etc. So it describes how he arrived where he has. Its a pleasant read.
Hope this helps.