
The reason ESP, for example, is not considered a viable topic in contemoprary
psychology is simply that its investigation has not proven fruitful...After
more than 70 years of study, there still does not exist one example of an ESP
phenomenon that is replicable under controlled conditions.  This simple but
basic scientific criterion has not been met despite dozens of studies conducted
over many decades...It is for this reason alone that the topic is now of little
interest to psychology...In short, there is no demonstrated phenomenon that
needs explanation.
-- Keith E. Stanovich, "How to Think Straight About Psychology", pp. 160-161
