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{{ | {{InfoboxPerson | ||
| name | |name=Allan Cheyne | ||
| | |born=Canada | ||
|occupation=Psychologist, sleep researcher | |||
| occupation | |known_for=Phenomenological taxonomy of [[Sleep paralysis|sleep paralysis]] hallucinations | ||
| known_for | |institution=University of Waterloo, Ontario, Canada | ||
| institution = University of Waterloo, Ontario, Canada | |status=Active | ||
| status | |||
}} | }} | ||
{{tick}} | |||
'''Allan Cheyne''' is a Canadian psychologist at the University of Waterloo, Ontario, whose survey-based research into [[Sleep paralysis|sleep paralysis]] produced the field's most influential empirical account of why the experience so often gets described in supernatural terms. | '''James Allan Cheyne''' is a Canadian psychologist at the University of Waterloo, Ontario, whose survey-based research into [[Sleep paralysis|sleep paralysis]] produced the field's most influential empirical account of why the experience so often gets described in supernatural terms.<ref name="uwaterloo">{{cite web |title=Awake in a Nightmare |publisher=University of Waterloo, Department of Psychology |url=https://uwaterloo.ca/psychology/news/awake-nightmare}}</ref> | ||
== Approach == | == Approach == | ||
Cheyne's contribution to [[Anomalistic Psychology|anomalistic psychology]] rests on a methodological shift: rather than working from small clinical or field samples, as earlier researchers had, he recruited sleep paralysis experiencers through the Waterloo Unusual Sleep Experiences Questionnaire, a large-scale online survey instrument that has since been used, in whole or in part, in roughly two dozen published studies across multiple laboratories.<ref name="researchgate-distress">{{cite web |title=Sleep Paralysis Postepisode Distress: Modeling Potential Effects of Episode Characteristics, General Psychological Distress, Beliefs, and Cognitive Style |publisher=ResearchGate |url=https://www.researchgate.net/publication/235489784_Sleep_Paralysis_Postepisode_Distress_Modeling_Potential_Effects_of_Episode_Characteristics_General_Psychological_Distress_Beliefs_and_Cognitive_Style}}</ref> That scale let him treat the phenomenology of the experience as a dataset — tracking which sensations occurred, how often, and in what combinations — in a way case studies alone couldn't support. | |||
Cheyne's contribution to [[Anomalistic | |||
== The three-category model == | == The three-category model == | ||
Cheyne's best-known work, developed across a series of studies from 1999 onward, formalised a three-part factor-analytic taxonomy of sleep paralysis hallucinations.<ref name="sciencedirect-bodyunbound">{{cite web |title=The body unbound: Vestibular–motor hallucinations and out-of-body experiences |publisher=ScienceDirect |url=https://www.sciencedirect.com/science/article/abs/pii/S0010945208001329}}</ref> | |||
Cheyne's best-known work formalised a three-part taxonomy of sleep paralysis hallucinations. | |||
=== Intruder hallucinations === | === Intruder hallucinations === | ||
The most commonly reported experience: a "sensed presence" — an overwhelming feeling that something else is in the room, elaborated through visual, auditory, and tactile hallucinations consistent with a threatening intruder.<ref name="sciencedirect-bodyunbound"/> Cheyne linked this and the incubus factor to REM-related activation of the amygdala and associated sensory cortex, with dream-like content bleeding into waking perception during paralysis.<ref name="sciencedirect-bodyunbound"/> | |||
The most commonly reported experience: an overwhelming | |||
=== Incubus hallucinations === | === Incubus hallucinations === | ||
Chest pressure, breathing difficulties, choking or suffocation sensations, pain, and thoughts of imminent death — often interpreted, when sufficiently elaborated, as physical or sexual assault.<ref name="sciencedirect-bodyunbound"/> This factor is highly correlated with the intruder factor, and fear is consistently reported in more than 80% of episodes overall.<ref name="researchgate-paranoid">{{cite web |title=Paranoid delusions and threatening hallucinations: A prospective study of sleep paralysis experiences |publisher=ResearchGate |url=https://www.researchgate.net/publication/6470014_Paranoid_delusions_and_threatening_hallucinations_A_prospective_study_of_sleep_paralysis_experiences}}</ref> | |||
Chest pressure, | |||
=== Vestibular-motor hallucinations === | === Vestibular-motor hallucinations === | ||
Floating, flying, falling, spinning, out-of-body experiences, and illusory limb or bodily movement. Cheyne tied these to disrupted vestibular and motor processing during the REM–wake transition, distinguishing them from the other-oriented intruder and incubus experiences as considerably more self-focused, and — unlike the fear typically associated with the other two factors — sometimes associated with feelings of bliss.<ref name="mnt">{{cite web |title=A waking nightmare: The enigma of sleep paralysis |publisher=Medical News Today |url=https://www.medicalnewstoday.com/articles/321569}}</ref> | |||
Floating, spinning, | |||
== Cross-cultural significance == | == Cross-cultural significance == | ||
Cheyne's own published work situates this three-part structure within a much older literature on culturally specific interpretations of the same underlying experience — most notably folklorist David Hufford's study of the "Old Hag" tradition in Newfoundland, alongside comparable traditions including ''kanashibari'' in Japan, jinn-visitation accounts in parts of the Islamic world, and modern alien abduction narratives.<ref name="wiley-1999">{{cite journal |title=Relations among hypnagogic and hypnopompic experiences associated with sleep paralysis |journal=Journal of Sleep Research |publisher=Wiley Online Library |url=https://onlinelibrary.wiley.com/doi/abs/10.1046/j.1365-2869.1999.00165.x |date=1999}}</ref> Subsequent cross-cultural research has continued to find the underlying phenomenology remarkably consistent across societies, independent of which supernatural or biomedical framework a given culture uses to explain it.<ref>{{cite journal |title=Phenomenology and Interpretations of Sleep Paralysis with an Aotearoa New Zealand Sample |journal=Kōtuitui: New Zealand Journal of Social Sciences Online |publisher=Wiley Online Library |url=https://rsnz.onlinelibrary.wiley.com/doi/10.1002/kot2.70025}}</ref> | |||
That consistency — one underlying neurological process, described through whatever supernatural vocabulary a culture has on hand — is one of the clearer pieces of evidence in anomalistic psychology that ordinary brain processes can produce experiences indistinguishable, from the inside, from a genuine encounter. | |||
That consistency — one neurological | |||
== Relevance to paranormal claims == | == Relevance to paranormal claims == | ||
Cheyne's findings give weight to the argument that a meaningful share of reported paranormal encounters — bedroom apparitions, night visitations, abduction narratives, demonic attacks — are sleep paralysis events filtered through whatever supernatural framework is culturally to hand.<ref name="uwaterloo"/> His work also reinforced a broader finding in [[Hallucination|hallucination]] research: vivid, externally projected perceptions of presences and figures are far more common in neurologically ordinary people than clinical models used to assume. | |||
Cheyne's findings give weight to the argument that a meaningful share of reported paranormal encounters — bedroom apparitions, night visitations, abduction narratives, demonic attacks — are sleep paralysis events filtered through whatever supernatural framework is culturally to hand. His work also reinforced a broader finding in [[Hallucination|hallucination]] research: vivid, externally projected perceptions of presences and figures are far more common in neurologically ordinary people than clinical models used to assume. | |||
== See also == | == See also == | ||
{{DivCol}} | |||
* [[Sleep paralysis]] | * [[Sleep paralysis]] | ||
* [[Hallucination]] | * [[Hallucination]] | ||
* [[Anomalistic | * [[Anomalistic Psychology]] | ||
* [[Old Hag]] | * [[Old Hag]] | ||
{{DivCol end}} | |||
== References == | |||
{{Reflist}} | |||
== External links == | |||
* [https://uwaterloo.ca/psychology/news/awake-nightmare University of Waterloo — Awake in a Nightmare] | |||
[[Category: | [[Category:Skeptical Advocates]] | ||
[[Category:People]] | |||
[[Category:Waterloo, Ontario]] | |||
Latest revision as of 23:16, 4 August 2026
James Allan Cheyne is a Canadian psychologist at the University of Waterloo, Ontario, whose survey-based research into sleep paralysis produced the field's most influential empirical account of why the experience so often gets described in supernatural terms.[1]
Approach
Cheyne's contribution to anomalistic psychology rests on a methodological shift: rather than working from small clinical or field samples, as earlier researchers had, he recruited sleep paralysis experiencers through the Waterloo Unusual Sleep Experiences Questionnaire, a large-scale online survey instrument that has since been used, in whole or in part, in roughly two dozen published studies across multiple laboratories.[2] That scale let him treat the phenomenology of the experience as a dataset — tracking which sensations occurred, how often, and in what combinations — in a way case studies alone couldn't support.
The three-category model
Cheyne's best-known work, developed across a series of studies from 1999 onward, formalised a three-part factor-analytic taxonomy of sleep paralysis hallucinations.[3]
Intruder hallucinations
The most commonly reported experience: a "sensed presence" — an overwhelming feeling that something else is in the room, elaborated through visual, auditory, and tactile hallucinations consistent with a threatening intruder.[3] Cheyne linked this and the incubus factor to REM-related activation of the amygdala and associated sensory cortex, with dream-like content bleeding into waking perception during paralysis.[3]
Incubus hallucinations
Chest pressure, breathing difficulties, choking or suffocation sensations, pain, and thoughts of imminent death — often interpreted, when sufficiently elaborated, as physical or sexual assault.[3] This factor is highly correlated with the intruder factor, and fear is consistently reported in more than 80% of episodes overall.[4]
Vestibular-motor hallucinations
Floating, flying, falling, spinning, out-of-body experiences, and illusory limb or bodily movement. Cheyne tied these to disrupted vestibular and motor processing during the REM–wake transition, distinguishing them from the other-oriented intruder and incubus experiences as considerably more self-focused, and — unlike the fear typically associated with the other two factors — sometimes associated with feelings of bliss.[5]
Cross-cultural significance
Cheyne's own published work situates this three-part structure within a much older literature on culturally specific interpretations of the same underlying experience — most notably folklorist David Hufford's study of the "Old Hag" tradition in Newfoundland, alongside comparable traditions including kanashibari in Japan, jinn-visitation accounts in parts of the Islamic world, and modern alien abduction narratives.[6] Subsequent cross-cultural research has continued to find the underlying phenomenology remarkably consistent across societies, independent of which supernatural or biomedical framework a given culture uses to explain it.[7]
That consistency — one underlying neurological process, described through whatever supernatural vocabulary a culture has on hand — is one of the clearer pieces of evidence in anomalistic psychology that ordinary brain processes can produce experiences indistinguishable, from the inside, from a genuine encounter.
Relevance to paranormal claims
Cheyne's findings give weight to the argument that a meaningful share of reported paranormal encounters — bedroom apparitions, night visitations, abduction narratives, demonic attacks — are sleep paralysis events filtered through whatever supernatural framework is culturally to hand.[1] His work also reinforced a broader finding in hallucination research: vivid, externally projected perceptions of presences and figures are far more common in neurologically ordinary people than clinical models used to assume.
See also
References
- ↑ 1.0 1.1 "Awake in a Nightmare."University of Waterloo, Department of Psychology.
- ↑ "Sleep Paralysis Postepisode Distress: Modeling Potential Effects of Episode Characteristics, General Psychological Distress, Beliefs, and Cognitive Style."ResearchGate.
- ↑ 3.0 3.1 3.2 3.3 "The body unbound: Vestibular–motor hallucinations and out-of-body experiences."ScienceDirect.
- ↑ "Paranoid delusions and threatening hallucinations: A prospective study of sleep paralysis experiences."ResearchGate.
- ↑ "A waking nightmare: The enigma of sleep paralysis."Medical News Today.
- ↑ "Relations among hypnagogic and hypnopompic experiences associated with sleep paralysis." Journal of Sleep Research.
- ↑ "Phenomenology and Interpretations of Sleep Paralysis with an Aotearoa New Zealand Sample." Kōtuitui: New Zealand Journal of Social Sciences Online.