Dave_a_mbs in some of his posts was sceptical about Newton, as the latter had been suggesting too much in his sessions.
I suggest
everyone who goes to a hypnosis regression session, and to whom it is something really important, should make a record of the session, so that afterwards one can recapitulate what informations may have been provoked by something the session leader said. But as Recoverer said, it might even be that someone picks up thoughts, or something which has been said before the session.
Now, when we think about this "suggestability" or "front loading"- bias, is there any method which doesn't carry this problem? I don't think so. In all ancient meditation techniques, as far as I know, there is massive front loading. Or think of TMI, let's imagine there is a participant who never has heard about anything of RAM or similar authors, would get no advices, and the HemiSync wouldn't contain any verbal guidance. Would the results be the same? I don't think so.
So, we might go along with Bruce and take it from the practical side: Priming the pump with active imaginery, imagination as a tool, or way of perception. You then have to decide what part of your experiences is actively made up by yourself, and which is not. The most things we get aren't easily to verify, but it happens that what we experience on a mind-journey is so unexpected, foreign, and far out that we must at least conclude, there has not been our usual kind of imagination at work, but something different.
Spooky