he Retropsychokinesis Project (RPKP) celebrates its twentieth anniversary this month. Launched in January of 1997, the project may be the largest and longest-running parapsychology experiment in history, having recorded over 880,000 experiments performed by more than 34,000 volunteers around the globe. (Participants can designate experiments as “practice” or “for the record”. The total above includes both categories, while the Experiment Summary, updated daily, includes only for the record experiments, which currently number more than 380,000.) In addition, control runs are automatically run and reported daily: almost 150,000 control runs are in the database.

Retropsychokinesis tests the hypothesis that users are able to exert an influence upon random data which have been pre-recorded but not examined prior to their experimental runs, and that the statistics of these data will differ from those of unexamined data. Please see the Background to the experiments for additional details, the retrocausality bibliography for additional reading, or the main project page for further references, some of which are online. “But that's crazy!”, you exclaim. Yes, I know, but previous experiments, notably those conducted by the physicist and parapsychologist Helmut Schmidt, have suggested that such an effect, albeit very small, may exist. I have proposed the outline of a crackpot theory which might explain such seemingly impossible experimental results.

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