The Problem with Randomised Controlled Trials (RCTs)

I have recently been debating the merits and problems of objective, quantitative research in mental health. (One of my interlocutors has posted a lengthy response here, arguing in favour of ‘objectivism’). RCTs are a methodological device introduced into mental health from general medicine. Whilst they are merely problematic in the latter, they are outright misleading in the former.