Reading the articles left me with the impression not that they were less effective, but that they couldn't prove efficacy. So they could win, or lose, but it was close.
It is also worth noting that one of the reasons why this happens in stage 3 despite having passed through a test in stage 2 that was meant to whittle this out is that improved expectations increase the strength of the placebo effect. Which makes the real effect harder to detect.
It is also worth noting that one of the reasons why this happens in stage 3 despite having passed through a test in stage 2 that was meant to whittle this out is that improved expectations increase the strength of the placebo effect. Which makes the real effect harder to detect.