Snowdrop
Senior Member (Voting Rights)
Yes, and I think that is the point. Trial participants are not themselves likely to be familiar with scientific methodologies. The primary objective that was drilled into them was to do well, and I strongly suspect that the focus for that was to do well within the context of the trial itself. A well run trial would have emphasised the need to capture overall activities, but I bet that did not happen for PACE. The treatment was in a sense self indulgent - the emphasis on participants being motivated by the therapy itself, to show how well the therapy was benefiting them. Some (maybe most) participants may never have realised the biasing effects of swapping out some of their normal daily activities in order to fulfil GET activities, and the PACE mindset might well have been to not enlighten them!
Yes, it's obvious after the fact with dissecting the trial into it's various bits. But when actually engaged in the trial with a focus on doing well and no extra energy or expertise to pay attention to other motivations or reasonings it is an easy possibility.