The Anomaly Called Psi: Recent Research and Criticism

Back in 1987, the study of psi — the umbrella term for things like telepathy and psychokinesis (mind over matter) — got its day in one of academia's toughest arenas. The journal Behavioral and Brain Sciences invited a sweeping review of over a century of experimental evidence, then published it alongside a skeptic's rebuttal and 35 expert commentaries picking it apart from every angle. It was essentially a heavyweight championship bout for parapsychology, and it remains a defining snapshot of where the debate stood. The review highlighted some genuinely impressive numbers. Experiments where people tried to mentally influence electronic random number generators showed combined odds against chance of one in ten billion. Ganzfeld studies — where a person in a sensory-reduced state tries to receive images sent by someone else — reported a 45% success rate where 25% would be expected by chance, with astronomical overall odds. The authors proposed an elegant unifying idea called the "noise reduction model": psi acts like a faint radio signal, and you pick it up better when you quiet the static of ordinary sensory input. That would explain why hits seem to cluster in ganzfeld sessions, meditation, hypnosis, and dream experiments — all states where the outside world is dialed down. The paper concluded there was a solid statistical case that psi effects could be repeated under the right conditions, though the skeptical commentary and Alcock's critique made sure every counterargument got airtime too. The whole package became a landmark, crystallizing the arguments about replication standards and experimenter influence that researchers would wrestle with for decades afterward.