What is most evident about this discussion is how people will defend thier perspective at any cost. An instrument can provide an 'objective' result but how that result is used depends upon the perspective of the user. The fact is we can measure physical phenomena and we can measure physical and psychological responses and the science tells us the placebo effect is real. If some people choose to use psycology in order to enhance thier expereince, is it any wonder that those with limited imaginations, who don't use this effect, don't understand it and are dismissive of it?