Discovery Lab Answers

Russell Targ is an American physicist who co-founded the remote-viewing research program at Stanford Research Institute (SRI) with Harold E. Puthoff in 1972 ^[1]. His work spans laboratory remote-viewing experiments, operational intelligence applications, precognition studies, and later reflections on his daughter Elisabeth Targ‘s clinical psi research. The profile at esp-nexus.org/scientists/russell-targ/ covers his full career arc.

Experiments

Remote viewing at SRI (1972 onward). Targ and Puthoff initiated a systematic program at SRI testing whether subjects could perceive distant locations without sensory access ^[1]. The first published series appeared in Nature (1974) and featured subjects — including Pat Price — whose descriptions were judged against target sites by independent blind evaluators ^[1]. A nine-trial replication series with Hella Hammid followed, published in the Proceedings of the IEEE (1976) ^[1].

Distance and shielding variations. Within the SRI program, Targ and Puthoff systematically varied viewer–target distance (roughly 2 to 2,000 miles) and tested viewers inside a double-walled copper-screen Faraday cage to probe whether electromagnetic signals could account for the effect ^[1].

Precognition / ESP-teaching machine studies. Targ and Puthoff also ran forced-choice precognition experiments using an ESP-teaching machine, tracking hits per run across 672 trials and applying linear regression to examine whether performance changed over trials ^[3].

Computer-scored erasure study (1985). Targ collaborated with Charles Tart on a test in which trial-by-trial target data were permanently erased before anyone could see them, as a control against feedback contamination ^[1].

Star Gate / SAIC decade. Targ’s 2019 retrospective describes operational remote-viewing work for U.S. intelligence from 1979 to 1995, including a Fort Meade group of more than a dozen army and civilian viewers, and formal studies by Edwin May from the final decade of the Star Gate program at SRI–SAIC ^[1].

Elisabeth Targ’s distant-healing trials. Targ’s 2016 essay discusses his daughter Elisabeth Targ’s randomized controlled trials at the California Pacific Medical Center on distant healing in patients with advanced AIDS ^[2]. Elisabeth Targ conducted these as a psychiatrist and clinical researcher, applying double-blind methodology — work that represented a distinct line from her father’s remote-viewing research.

Methodology

The SRI remote-viewing protocol used a free-response outbound design: a sender traveled to a randomly selected target site while the viewer, remaining at SRI, described what the sender was experiencing. Independent judges then ranked unlabeled transcripts against the candidate target sites — a blind-matching/ranking procedure that mainstream psychophysics situates within signal detection theory, which supplies the chance baselines against which hit rates are measured ^[1].

Key design features across the SRI series included:

• Blind judging: independent evaluators who had not observed the sessions ranked transcripts against candidate sites, insulating the scoring from experimenter knowledge.
• Distance and shielding controls: systematic variation of viewer–target separation and Faraday-cage shielding to test electromagnetic hypotheses ^[1].
• Faraday cage sessions: the viewer was electrically isolated while the sender was at the target; results were compared to unshielded sessions ^[1].
• Mini-targets and improved controls: later replication studies introduced miniaturized targets and tightened experimental controls to increase statistical power ^[1].
• Computer-erasure design (1985): the Targ–Tart study permanently deleted trial-by-trial data before any human reviewed them, as a direct control against response bias from feedback ^[1].
• Forced-choice precognition machine: the ESP-teaching machine delivered binary forced-choice trials with immediate feedback, allowing run-by-run tracking and linear regression analysis of performance trends ^[3].

For Elisabeth Targ’s distant-healing work, the design shifted entirely to a randomized, double-blind clinical trial format — patients randomized to healers or control, with outcomes assessed by clinicians blind to assignment ^[2].

Data

No structured quantitative evidence block was supplied for this question, so the figures below come only from the text of the retrieved sources; the retrieved excerpts do not contain the full statistical tables, and the primary papers should be consulted for complete data.

From the retrieved sources:

Targ argues from these results that remote-viewing accuracy appeared independent of viewer–target distance and unaffected by electromagnetic shielding, which he treats as evidence against conventional signal-based explanations ^[1]. The evidential weight of the series rests substantially on the blind-judging step; the chance baselines in the matching and ranking tasks derive from signal detection theory assumptions about independent, equiprobable alternatives ^[1].

The retrieved excerpts do not show complete trial counts, confidence intervals, or session-level data for most series; those figures are in the primary publications.

Skeptical critiques

What critics argue. The SRI remote-viewing protocol attracted sustained methodological criticism focused on sensory leakage and judging procedure. The central concern, articulated in detail by Marks and Kammann (1980) in The Psychology of the Psychic, was that judges matching transcripts to target sites were not working under adequately blind conditions — specifically, that transcripts contained cues (references to prior targets, grammatical tense, experimenter comments) that allowed above-chance matching without any anomalous perception. Marks and Kammann argued that when such cues were removed or controlled, the apparent matching effect disappeared. A related methodological concern raised by Hansel (1980) in ESP and Parapsychology: A Critical Reevaluation focused on the adequacy of randomization procedures and the degree to which the SRI experimental environment permitted inadvertent information transfer between experimenters and viewers.

What the experimental data show. Targ’s 2019 retrospective addresses the distance and shielding results directly, reporting that accuracy was not degraded across the tested range of distances or under Faraday-cage conditions ^[1]. The 1985 computer-erasure study with Charles Tart was explicitly designed to remove trial-by-trial feedback as a potential confound, by permanently deleting target data before any human reviewed them ^[1]. The Nature (1974) and Proceedings of the IEEE (1976) papers both used independent blind judges, which was the protocol feature the SRI group cited as its primary control against experimenter bias ^[1].

Analysis. Marks and Kammann (1980) published a specific reanalysis of the Nature series transcripts and reported that cue removal reduced the matching effect; the SRI group disputed the cue-removal procedure. Hansel (1980) and later Ray Hyman — in commentary on remote-viewing and related protocols through the 1980s and 1990s — raised concerns about the adequacy of blinding and the possibility of subtle information transfer in outbound designs. Independent replications of the outbound remote-viewing protocol by groups outside SRI produced mixed outcomes: some reported above-chance results, others did not, and the between-laboratory variance has not been accounted for in a published meta-analysis that all parties accept. The 1985 erasure study addressed one specific confound (feedback-driven response bias) but did not resolve the judging-cue question.