Are you sure your interpretation is correct? You said
> if you tell dentists that they may be administering placebo analgesics to their participants, the participants report significantly higher pain during dental treatment (even though all participants got an active drug)
whereas the study seems to claim
> if you tell dentists that they may be administering an antagonist to their participants, the participants report significantly higher pain during dental treatment (even though all participants got a placebo)
Whoops, its been a few years since I read that paper (I did my PhD on this, but finished a few years back). Apologies for the noise, it appears you are correct.
