The term psychokinesis was also known as telekinesis, sometimes abbreviated PK and TK respectively, is a term coined by Henry Holt to refer to the direct influence of mind on a physical system that cannot be entirely accounted for the mediation of any known physical energy. Examples of psychokinesis could include distorting or moving an object, or influencing the output of a random number generator.
The study of phenomena said to be psychokinetic is an aspect of parapsychology. Some paranormal researchers believe that psychokinesis exists and deserves further study, although the focus of research has shifted away from large-scale phenomena to attempts to influence dice and then to random number generators.
There is currently no scientific evidence that has gone unchallenged that shows psychokinesis exists. A meta-analysis of 380 studies in 2006 found a "very small" effect which could be explained by publication bias. PK experiments have historically been criticised for lack of proper controls and repeatability. However, some experiments have created illusions of PK where none exists, and these illusions depend to an extent on the subject's prior belief in PK.
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