&quot;A Bayes Factor Meta-Analysis of Recent Extrasensory Perception Experiments&quot;[0] is a good read in this area. It extends the analysis of psi with Bayes factors and underscores how the priors, and a causal mechanism, really matter.<p>[0] <a href="http:&#x2F;&#x2F;deanradin.com&#x2F;evidence&#x2F;Rouder2013Bayes.pdf" rel="nofollow">http:&#x2F;&#x2F;deanradin.com&#x2F;evidence&#x2F;Rouder2013Bayes.pdf</a>