Overview

Bio-PK occupies a middle position in the catalogue of claimed psi effects: its target is a living body rather than a machine or an object, and its signature is a faint statistical drift rather than anything visible to the eye. The topic matters because, unlike many psi claims, it produces a continuous physiological signal that can be recorded by standard laboratory instruments and analyzed with conventional statistics, which made it attractive to researchers seeking objective dependent measures.

The literature is organized around two related questions. The first asks whether focused intention can nudge a distant person’s autonomic activity at all. The second asks whether that same capacity could underwrite distant healing in a clinical setting. Reviews treat the laboratory work as proof-of-principle evidence while cautioning that clinical efficacy has not been established.^[1] Broader surveys place bio-PK effect sizes alongside other psi protocols, where individual effects are small and replication remains contested.^[2]

Phenomenology: what is reported

In a typical study a sender attempts, from another room, to either calm or activate a distant receiver during randomly timed influence periods, while the receiver sits quietly with no task. The receiver’s body is reported to respond during the periods the sender was active, even though the receiver cannot know when those periods occur.

The reported correlates extend across several physiological channels. Recordings of digestive activity have been read as responding to a distant person’s emotions, framed by the authors as a possible basis for ordinary gut feelings.^[3] The brain has also been examined: under sensory isolation and electromagnetic shielding, one person’s EEG has been reported to show correlations with potentials evoked in a distant partner’s brain.^[4] A closely associated but distinct line of work concerns the sense of being stared at, where a person is said to detect remote observation.^[5]

History of the label

The term bio-psychokinesis arose to distinguish intention directed at living tissue from psychokinesis aimed at dice or random hardware. Early work tested influence on a range of biological targets, from autonomic nervous-system activity to cell cultures and animal behavior, scoring each against chance expectation rather than visible movement.

By the 1990s the phenomenon was increasingly discussed under the heading of distant intentionality and healing, a framing that linked the laboratory measure to the older practice of healing at a distance.^[6] The experimental paradigm that grew up around the autonomic measurements acquired its own name, DMILS, and a systematic review treated DMILS as a way to assess healing claims inside the physiological laboratory.^[7] The phenomenon and the paradigm are distinct: bio-PK is the claimed effect, while DMILS is the controlled procedure built to detect it.

How it is studied

The most common target measure is electrodermal activity (EDA), the moment-to-moment change in skin conductance that tracks sympathetic arousal. Other studies have used respiration, heart rate, digestive rhythms, and brain potentials. The defining controls are sensory isolation and distance, so that no ordinary signal can pass from sender to receiver, with the timing of influence periods randomized and the scoring blind.

The protocol was formalized at the Mind Science Foundation, where the electrodermal design became a template for later replications. A pilot replication by Dean I. Radin, Robin K. Taylor, and William G. Braud reported remote influence on EDA with effect sizes comparable to earlier meta-analytic values, and additionally reported that geomagnetic field fluctuations appeared to modulate the effect.^[8] Later exploratory work extended the design across thousands of miles and across a two-month time separation, reporting that distant intention was associated with changes in a receiver’s autonomic physiology independent of distance.^[9]

Evidence summary

The evidence base rests heavily on the autonomic-influence studies pioneered in Braud‘s programme and on the meta-analyses that pooled them. A two-part synthesis co-authored by Jessica M. Utts combined 36 DMILS direct-intentionality studies and found a small but statistically significant pooled effect; the same paper’s separate analysis of 15 remote-staring studies yielded a small significant effect (d = 0.13, p = .01). A seven-study best-evidence subset of the direct-intentionality analysis was not significant (d = .05, p = .50). The authors concluded that there are hints of an effect alongside a shortage of independent replications and theoretical concepts.^[10] A later meta-analysis of eleven attention-focusing facilitation experiments reported a similarly small effect favoring the hypothesis that benevolent distant intention can aid a target’s attention.^[11]

The largest single clinical-style study directed compassionate intention from the partners of cancer patients toward those patients, measuring skin conductance under double-blind conditions, and reported autonomic activation that was enhanced among senders trained in cultivating intention.^[12]

A meta-analysis combining 36 DMILS direct-intentionality studies found a small but statistically significant pooled effect, and a separate analysis of 15 remote-staring studies reported a small significant effect of its own.^[10]

An assessment prepared for a government review of psychic functioning concluded that some psi effects had been established statistically, while leaving mechanism unaddressed.^[13] Reviews that fold bio-PK into the wider field stress that the per-study effects are small even where they reach significance.^[2]

Individual studies in the reference library

The studies listed below are the individual distant-influence and remote-staring results currently held in the ESP-Nexus reference library. What share of the published literature on distant mental influence they represent has not been measured, so the table summarizes what the library holds rather than counting what has been published. The studies also report different kinds of number — hit rates, standardized effect sizes, Stouffer Z values and p values alone — and those cannot be added together into one bottom-line figure.

The largest reported departures from chance in this set come from the arms run by the proponent experimenter and from repeated testing with two practiced participants. Wiseman and Schlitz found in both 1997 and 1999 that receivers run by Schlitz departed significantly from chance while receivers run by Wiseman did not, on the same equipment, from the same participant pool, in the same sessions.^[20][22] Sheldrake and Smart report 52.8% hits across 2,800 trials from two participants who had each already served as staree in more than 70 tests, alongside control tests without staring that returned 49.3%.^[26] The null results are equally consistent: Delanoy and Morris found the activate-versus-calm difference in the predicted direction but not significant across 36 sessions,^[21] Müller, Schmidt and Walach found no significant staring effect in either electrodermal activity or conscious guessing,^[27] and Stevens, reanalyzing two earlier datasets, found no electrodermal activity comparable to a sensory response.^[23]

Two results in the table carry qualifications their authors state directly. Edge, Suryani, Tiliopoulos and Morris obtained significant results on the primary measure in both Balinese studies, with a combined effect size of Cohen’s r = .32, and write that the two studies “were greatly underpowered, especially for the secondary and exploratory analyses”; their finding that high-need helpees scored above low-need ones (p = .013, one-tailed) is qualified in the same paper by a post hoc analysis showing a high-need helpee was ten times more likely to be untrained.^[24] Sheldrake and Smart’s 2024 report is a collection of submitted accounts rather than an experiment, and the authors write that they “cannot conclude from these reports that the phenomenon definitely exists.”^[28]

Skeptical critiques

The sharpest internal critique comes from Marilyn J. Schlitz‘s collaboration with a skeptical investigator on remote staring, in which the two researchers ran a joint protocol and obtained different results depending on who conducted the sessions. A later interview project examined this experimenter effect, attributing the divergence to tacit differences in how each researcher prepared participants and held intention during observation.^[14] Caroline Watt and a co-author pursued the same theme in two attention-focusing studies and reported the discovery of an artifact in the design, cautioning that apparent effects can arise from procedural flaws.^[15] A companion study by Watt examined how experimenters themselves differ in belief and outcome.^[16]

The methodological critique within the meta-analytic literature is detailed: the two-part synthesis itself scrutinized EDA recording standards, randomization, blinding, and publication bias across the corpus.^[10] A broader argument holds that the replication problem may be intractable, with pre-registered attempts at a related psychokinetic paradigm failing to reproduce earlier positive results.^[17] A separate critical analysis frames the recurring failures as a structural feature of psi research, arguing that the scientific method may be poorly matched to phenomena that blur the line between observer and observed.^[18]

The three joint studies report figures that make the divergence legible. In 1997, receivers run by Wiseman gave a Wilcoxon z of −0.44 (p = .64) while receivers run by Schlitz gave z = −2.02 (p = .04), with electrodermal activity higher during stare trials; an unpaired test of the two experimenters’ detect scores against each other, however, was not significant (t = 1.39, df = 30, p = .17).^[20] The 1999 replication reproduced the experimenter-level split, z = −0.39 (p = .69) for Wiseman’s participants against z = −1.93 (p = .05) for Schlitz’s, and the authors record two qualifications of their own: the sign of the significant effect reversed, so that Schlitz’s participants were now significantly less activated during staring than during non-staring, and the between-experimenter comparison of detect scores was again not significant (t = −0.77, p = .44).^[22] Wiseman and Schlitz set out a conventional candidate for the 1997 divergence in the paper itself: receivers were assigned to the two experimenters in an opportunistic rather than a randomized fashion, and the receivers Schlitz ran scored higher on a belief-in-psi questionnaire than the receivers Wiseman ran, a difference that just failed to reach significance (t = 1.86, df = 30, p = .072).^[20] The third joint study, run with 100 participants using a double steel-walled, electromagnetically and acoustically shielded chamber and a remote observation room 15 meters away, returned null results in both the condition where Schlitz acted as greeter and sender (z = −0.17, p = .87) and the condition where Wiseman did (z = −0.35, p = .72). Schlitz, Wiseman, Watt and Radin state that the study failed to replicate their previous findings, and set out two competing interpretations without choosing between them: that a genuine effect present earlier was disrupted by some aspect of the new study, or that the earlier results were chance findings or undetected artifacts.^[25]

Stevens tested a prior assumption the paradigm rests on: that the electrodermal response to remote monitoring resembles a response to a sensory stimulus. Reanalyzing the datasets from two earlier DMILS studies, Stevens reported no electrodermal activity obviously comparable to a sensory response and no consistent difference between activate and calm periods, but did find a scale-invariant pattern in the variance of the electrodermal record that separated any influence attempt from rest periods (p < 0.01 and p < 0.0002, two-tailed), a pattern that also appeared in data from exposure to a weak magnetic field.^[23] Delanoy and Morris reported an overall measure that did not reach significance while noting that their effect size of .19 is comparable to the mean of .25 across other electrodermal DMILS studies, and cautioned that their own results “should be interpreted with caution given the low power of this study.”^[21]

Current status

The phenomenon remains contested. Sympathetic reviewers read the laboratory autonomic studies as consistent proof-of-principle while conceding that clinical healing trials have not delivered reliable efficacy.^[1] Critics counter that the effects are small, that experimenter influence is documented, and that key paradigms have resisted independent replication.

The experimenter-effect findings have reframed the central problem: the question is no longer only whether bodies respond to distant intention, but why outcomes track the person running the experiment.^[14] Methodological disputes over how to pool and weight psi studies continue in published exchanges over inclusion criteria and effect-size metrics.^[19] Until a paradigm survives pre-registered replication across opposed laboratories, bio-PK will remain a small, statistically detected signal whose interpretation divides the field.