Mediums are, by definition, people who mediate communications between the living and spirits of the dead. Many psychics claim to have the ability, and a sizable percentage of people believe in this power and have been witnesses to spirit channeling, seances and other forms of the practice. Some religions make it a key part of their belief systems. Governments, police departments and militaries have attempted to use it for obviously non-spiritual purposes with some professed degree of success. And yet, many believe mediumship is a fraud and practitioners are charlatans or hucksters. One way to prove the power is through scientific, controlled experiments. There’s are reasons why mediums avoid this, which may be obvious in a recently published paper on one such test.