Placebo is highly sensitive to trial design, which is what I suspect is happening here. This is an intriguing  effect, meaning that trials are increasingly reporting that all sorts of therapeutic effects are apparently less effective than previously thought.  Or are they?<p>More on this at the excellent Mind Hacks blog:<p><a href="http:&#x2F;&#x2F;mindhacks.com&#x2F;2015&#x2F;07&#x2F;08&#x2F;cbt-is-becoming-less-effective-like-everything-else&#x2F;" rel="nofollow">http:&#x2F;&#x2F;mindhacks.com&#x2F;2015&#x2F;07&#x2F;08&#x2F;cbt-is-becoming-less-effecti...</a>