I don't really understand how they think of their fiddling of criteria to achieve results that fitted with their preconcpetions, but they clearly don't thikn that they've admitted to fraud. I'd like to have them speak more about it. It reminds of of the Wasink blog:
http://www.timvanderzee.com/the-wansink-dossier-an-overview/
Ahh... I see what you were getting at there. Probably a challenging point to make to someone who hasn't been following the history though.
Patients are told that their belief they are ill is not based on underlying pathology but that often seems to be by doctors who have a confused understanding of something they half remember reading/hearing. The problems with the PACE researchers' work has certainly made things worse though.
I'm not sure that it's right to say that there is a model which underpins PACE, other than a form of 'pragmatism' which assumes it's legitimate to manage patient cognitions on the basis of results from poorly designed trials (though the researchers clearly favoured two of the treatments tested and the models underlying them).