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I am assuming that volunteers who take part in drug trial testing are aware of the fact that they may be given placebos.Is it likely that this awareness may make the placebo effect less efficacious? 
Interesting, but this effect would be equal in both populations (placebo and drug). So it would not affect any inference you would draw.I am assuming that volunteers who take part in drug trial testing are aware of the fact that they may be given placebos.Is it likely that this awareness may make the placebo effect less efficacious?![]()