Does psi exist? In a recent article, Dr. Bem conducted nine studies with
over a thousand participants in an attempt to demonstrate that future events
retroactively affect people’s responses. Here we discuss several limitations
of Bem’s experiments on psi; in particular, we show that the data analysis was partly exploratory, and that one-sided p-values may overstate the
statistical evidence against the null hypothesis. We reanalyze Bem’s data
using a default Bayesian t-test and show that the evidence for psi is weak
to nonexistent.
An important reply cited in the other threads:
http://www.ruudwetzels.com//articles/Wagenmakersetal_subm.pdf