The "Haunt" project: an attempt to build a "haunted" room by manipulating complex electromagnetic fields and infrasound.
← Research streamIn a chamber experiment varying infrasound and complex EMFs (infrasound, EMFs, both, or neither), many participants reported anomalous sensations, but the number of sensations reported was unrelated to experimental condition and was related to TLS scores. Aut…
Study snapshot
Abstract
Recent research has suggested that a number of environmental factors may be associated with a tendency for susceptible individuals to report mildly anomalous sensations typically associated with "haunted" locations, including a sense of presence, feeling dizzy, inexplicable smells, and so on. Factors that may be associated with such sensations include fluctuations in the electromagnetic field (EMF) and the presence of infrasound. A review of such work is presented, followed by the results of the "Haunt" project in which an attempt was made to construct an artificial "haunted" room by systematically varying such environmental factors. Participants (N=79) were required to spend 50 min in a specially constructed chamber, within which they were exposed to infrasound, complex EMFs, both or neither. They were informed in advance that during this period they might experience anomalous sensations and asked to record on a floor plan their location at the time of occurrence of any such sensations, along with a note of the time of occurrence and a brief description of the sensation. Upon completing the session in the experimental chamber, they were asked to complete three questionnaires. The first was an EXIT scale asking respondents to indicate whether or not they had experienced particular anomalous sensations. The second was the Australian Sheep-Goat Scale, a widely used measure of belief in and experience of the paranormal. The third was Persinger's Personal Philosophy Inventory, although only the items that constitute the Temporal Lobe Signs (TLS) Inventory sub-scale were scored. These items deal with psychological experiences typically associated with temporal lobe epilepsy but normally distributed throughout the general population. Although many participants reported anomalous sensations of various kinds, the number reported was unrelated to experimental condition but was related to TLS scores. The most parsimonious explanation for our findings is in terms of suggestibility.
AI evidence extraction
Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.
Main findings
In a chamber experiment varying infrasound and complex EMFs (infrasound, EMFs, both, or neither), many participants reported anomalous sensations, but the number of sensations reported was unrelated to experimental condition and was related to TLS scores. Authors suggest suggestibility as a parsimonious explanation.
Outcomes measured
- Self-reported anomalous sensations (e.g., sense of presence, dizziness, smells)
- EXIT scale responses (anomalous sensations)
- Australian Sheep-Goat Scale (belief/experience of paranormal)
- Temporal Lobe Signs (TLS) Inventory sub-scale scores
Limitations
- No quantitative exposure characterization provided (e.g., EMF frequencies/levels; infrasound parameters).
- Outcomes are self-reported and participants were told in advance they might experience anomalous sensations (potential expectancy/suggestibility effects).
- Randomization/blinding procedures not described in the abstract.
View raw extracted JSON
{
"study_type": "randomized_trial",
"exposure": {
"band": null,
"source": "experimental chamber",
"frequency_mhz": null,
"sar_wkg": null,
"duration": "50 min"
},
"population": "Participants (susceptible individuals not specified); general population implied",
"sample_size": 79,
"outcomes": [
"Self-reported anomalous sensations (e.g., sense of presence, dizziness, smells)",
"EXIT scale responses (anomalous sensations)",
"Australian Sheep-Goat Scale (belief/experience of paranormal)",
"Temporal Lobe Signs (TLS) Inventory sub-scale scores"
],
"main_findings": "In a chamber experiment varying infrasound and complex EMFs (infrasound, EMFs, both, or neither), many participants reported anomalous sensations, but the number of sensations reported was unrelated to experimental condition and was related to TLS scores. Authors suggest suggestibility as a parsimonious explanation.",
"effect_direction": "no_effect",
"limitations": [
"No quantitative exposure characterization provided (e.g., EMF frequencies/levels; infrasound parameters).",
"Outcomes are self-reported and participants were told in advance they might experience anomalous sensations (potential expectancy/suggestibility effects).",
"Randomization/blinding procedures not described in the abstract."
],
"evidence_strength": "moderate",
"confidence": 0.74,
"peer_reviewed_likely": "yes",
"keywords": [
"haunted room",
"anomalous sensations",
"complex electromagnetic fields",
"EMF fluctuations",
"infrasound",
"suggestibility",
"temporal lobe signs",
"Persinger",
"EXIT scale"
],
"suggested_hubs": []
}AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.
Identifiers and source
DOI: 10.1016/j.cortex.2007.10.011
PubMed: 18635163