Micro-Psychokinesis

Micro-PK grew directly out of J. B. Rhine's 1930s dice experiments at Duke, in which subjects tried to mentally influence which face of a thrown die would land upward, an effect measured only statistically across large numbers of throws rather than seen directly. As electronic random number generators became available from the 1960s and 1970s, parapsychologists adopted them as a cleaner target, removing the mechanical variables of a physically thrown die, and reframed the research as testing whether human intention could bias a quantum or electronic source of randomness.

The most ambitious version of this research was the Princeton Engineering Anomalies Research (PEAR) laboratory, founded in 1979 by aerospace engineering professor Robert G. Jahn with collaborator Brenda Dunne, which spent 28 years running operators through millions of RNG trials, along with related "remote perception" experiments, publishing its methods and results openly in Jahn and Dunne's 1987 book Margins of Reality. PEAR reported statistically small but, its founders argued, cumulatively significant deviations from chance correlated with an operator's stated intention, and the lab became one of the most visible and most argued-over parapsychology programs in the world for its entire run.

PEAR's relationship with Princeton University was strained throughout its existence; university administrators and many faculty regarded the program as an embarrassment, and it operated for most of its life with minimal institutional support beyond Jahn's own standing as a respected engineer. Critics, both inside and outside parapsychology, disputed PEAR's statistical methods, particularly its practice of pooling very large numbers of trials to detect very small effect sizes, arguing that such pooling can make even tiny, mundane biases in equipment or analysis appear as a significant cumulative deviation, and noted that PEAR's effect sizes shrank as its methodology tightened over the decades. No outside laboratory replicated PEAR's reported effect to a standard the wider physics or psychology community accepted as conclusive, and a large multi-laboratory replication effort coordinated in the late 1980s and 1990s, involving PEAR and other groups, produced inconsistent results across sites.

The lab closed in February 2007 after 28 years, with Jahn stating that it had accomplished what it set out to do scientifically and that the remaining work was better pursued elsewhere; independent commentators were more direct, treating the closure as the end of the most extensive micro-PK program ever run without it having produced a widely accepted positive result. A related, still-running effort, the Global Consciousness Project, has applied similar random-generator logic to world events since 1998 and remains disputed on comparable statistical grounds.