Discovery Lab Answers

Nicola J. Holt, PhD is a parapsychologist and anomalistic psychologist whose published experimental work spans several interconnected lines: the cognitive and personality correlates of psi performance, interpersonal and experimenter effects in ganzfeld studies, and the role of the sender in ESP protocols. What follows works through her experiments and data in detail.

Experiments

Latent inhibition, creativity, and anomalous cognition (2020)

Holt, with Christine A. Simmonds-Moore and Stephen L. Moore, published a study testing whether latent inhibition (LI) — the cognitive mechanism by which previously irrelevant stimuli are screened from awareness — might underpin a psi-conducive cognitive style ^[1]. The experiment used a 2 × 2 design crossing pre-exposure condition (pre-exposed vs. not pre-exposed) with a sending condition (sending vs. no-sending), and measured performance on a masked learning task. Psychometric variables including creativity and positive schizotypy were assessed as potential moderators ^[1].

Creativity and psi with an experience-sampling protocol (2007)

Holt tested whether artistic populations — hypothesized to be psi-conducive on account of their creative cognitive styles — outperform matched non-artist controls in a free-response ESP paradigm ^[3]. Participants were drawn from visual arts, music, and design fields; controls were matched on relevant variables. The study used an experience-sampling protocol and independent judging of target clips ^[3].

Schizotypy, ganzfeld, and waking control conditions (2007)

Simmonds-Moore and Holt compared psi performance between a ganzfeld condition and a methodologically matched waking ESP condition, simultaneously examining whether schizotypy clusters predicted performance differentially across the two states ^[4]. The laboratory used a single PC with three independent-signal monitors in separate rooms for experimenter, sender, and receiver, following a layout described in Roe, Sherwood, and Holt (2004) ^[4].

The sender as a PK agent (2006)

Holt and Chris A. Roe investigated whether the sender in an ESP study makes an active psychokinetic contribution to outcomes, using a novel protocol in which an RNG served as a “virtual receiver” rather than a human one ^[5]. Holt conducted all trials. An automated ganzfeld system developed by Paul Stevens presented digital MPEG video clips from the Roe and Holt (2005) target pool ^[5].

Interpersonal psi and experimenter climate (2005)

Sherwood, Roe, Holt, and Wilson ran a ganzfeld telepathy study designed explicitly to examine how experimenter identity and the experimental climate — participant mood, expectations, and perceived rapport — relate to psi task outcomes ^[6]. Three experimenters each ran a subset of trials: Holt conducted 14, Roe 13, and Sherwood 11 ^[6].

Methodology

Holt’s experimental designs share several consistent features across studies.

Ganzfeld and waking-control protocols. The ganzfeld studies use a standard setup — receiver in a sensorily attenuated state, sender in a separate room, video clip targets — with independent judging as the primary outcome measure. Sum of ranks (where judges rate each clip) and z-scores derived from those ratings are the planned primary statistics ^[4][6]. The 2007 Simmonds-Moore and Holt study added a methodologically matched waking condition to allow direct comparison of state effects while holding other variables constant ^[4].

Factorial and correlational designs. The 2020 LI study used a 2 × 2 factorial design to separate pre-exposure effects from sending effects, enabling within-study comparison of a conventional LI effect against a “psi-LI-like” effect in the sending conditions ^[1]. Psychometric scales measuring creativity, positive schizotypy, and non-linear creative cognition were assessed for their correlation with performance across conditions ^[1].

Experience-sampling and free-response. The 2007 creativity study used a free-response ESP protocol with independent judges rating target clips, and computed z-scores for each judge’s target rating; inter-rater reliability between the two judges was assessed (r = .716) ^[3].

Sender-as-PK protocol. In the 2006 study, the conventional human receiver was replaced by an RNG acting as a virtual receiver, removing the receiver from the hypothesized causal chain and isolating the sender’s potential contribution. Participants received statement-by-statement feedback ^[5]. Earlier related work by Roe, Holt, and Simmonds (2003) had used both a human receiver and a virtual receiver in parallel, allowing comparison ^[5].

Experimenter-effects measurement. The 2005 interpersonal study collected pre-session ratings from both participants and experimenters on mood, expectations of success, and perceived rapport, then correlated these prospectively with the z-score outcome for each trial — a pre-specified correlational analysis alongside the primary psi-task hypothesis ^[6].

Data

The retrieved sources do not contain a single shared metric across all studies, so the figures are presented study by study. No pooling across these different designs is warranted.

Several features of this data set deserve attention:

• Null primary outcomes predominate. The ganzfeld condition in Simmonds-Moore and Holt (2007) and the overall psi task in Sherwood et al. (2005) both produced non-significant, near-zero or slightly below-chance primary effects ^[4][6]. The primary psi hypothesis in Holt (2007) also did not reach significance ^[3].

• Hit rates diverge from z-scores. In Simmonds-Moore and Holt (2007), the ganzfeld hit rate of 23.1% fell below the 25% mean chance expectation, while the waking hit rate of 30.8% sat above it — yet neither z-score was significant, and the two conditions did not differ significantly from each other ^[4].

• Exploratory correlates produced significant findings where the primary did not. In Holt (2007), two post-hoc correlations reached significance: use of ideas perceived as coming from “beyond the self” was associated with psi-missing (rho = −.429, p = .018, two-tailed), and cognitive flexibility/originality was associated with effect magnitude (rho = −.535, p = .004, two-tailed) ^[3]. In the 2020 LI study, non-linear creative cognition significantly moderated performance across sending conditions (z = −2.30, p = .02), even though the primary psi-LI hypothesis was not supported ^[1].

• Moderator signals are specific. The 2020 study found a conventional latent inhibition effect (significant) but no significant extension of that effect into the psi-sending condition. Non-linear creative cognition emerged as a moderator, but creativity and positive schizotypy did not moderate the psi-LI effect as hypothesized ^[1].

• Experimenter-level variation. In Sherwood et al. (2005), correlations between receiver tension and target ratings ran in opposite directions for different experimenters: positive for Holt and Sherwood (r = .281 and .269 respectively), negative for Roe (r = −.198) ^[6].

The retrieved excerpts do not contain primary outcome statistics for the 2006 sender-as-PK study ^[5]; the paper is in the sources and readers should consult it directly for those figures.

Skeptical critiques

The sources retrieved for this question do not include a published critique of Holt’s work by a named external critic. What the studies themselves record, however, is relevant here.

What the studies’ own authors flag. Holt (2007) notes that the artist sample in that study did not score higher than controls on belief in the paranormal, unusual experiences, or emotional creativity — variables on which artists typically outscore non-artists — raising the question of whether the artist group was adequately representative of the population that theory predicts should be psi-conducive ^[3]. The authors of the 2020 LI study observe directly that the hypothesis linking psychometric variables to enhanced LI and psi-effects with a complex masking task load was not supported, and that significant moderator effects found in exploratory analyses (non-linear creative cognition) were not pre-specified ^[1]. The 2005 interpersonal study’s authors note that the overall psi effect was non-significant, and that experimenter-level patterns in correlations with receiver tension were inconsistent across the three experimenters — a pattern the paper acknowledges without resolving ^[6].

What the experimental data show. Across Holt’s collaborations, the primary psi outcomes are largely null, while significant effects appear in exploratory correlational analyses ^[1][3][4][6]. The distinction between confirmatory and exploratory results is material: a significant moderator found post-hoc carries less evidential weight than a pre-specified primary outcome.

Analysis. The pattern across these studies — null primaries alongside significant exploratory correlates — is a recurring methodological tension in individual-differences research in parapsychology. Pre-specified replication of the moderator effects (non-linear creative cognition, psi-missing in those scoring high on “beyond-the-self” ideation) in independent samples has not been reported in the sources retrieved here. The interpersonal study’s inconsistent experimenter-level correlations similarly await independent replication.

For a fuller treatment of Holt’s research record, the ESP-Nexus pages at Nicola J. Holt, PhD, Creativity, Schizotypy, and Psi-Conducive Cognition, and Individual Differences and Interpersonal Factors in Psi Performance carry the site’s full synthesis.