Interesting new post that provides a way to study a potential placebo effect.  The idea is that, if a placebo effect can explain a finding (in this case the effect of exercise on memory),  then people need to believe in the potential relationship.  The authors argue that the effects of exercise on memory can’t be placebo effects, because people don’t believe exercise affects memory.

http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0109557

More than that, the article has really good ancillary material, including the dataset and the R code that runs the analyses.

Kudos!

Are the effects of exercise due to placebo?