Allan Cheyne - Revision history

GaryJJSpate at 23:16, 4 August 2026

2026-08-04T23:16:41Z

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	{{~~PersonInfobox~~		{{InfoboxPerson
	\|name=Allan Cheyne		\|name=Allan Cheyne
	\|born=Canada		\|born=Canada

GaryJJSpate at 23:15, 4 August 2026

2026-08-04T23:15:22Z

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	{{PersonInfobox		{{PersonInfobox
	\|name=Allan Cheyne		\|name=Allan Cheyne
	\|born= Canada		\|born=Canada
	\|occupation=~~psychologist~~, sleep researcher		\|occupation=Psychologist, sleep researcher
	\|known_for=Phenomenological taxonomy of [[Sleep paralysis\|sleep paralysis]] hallucinations		\|known_for=Phenomenological taxonomy of [[Sleep paralysis\|sleep paralysis]] hallucinations
	\|institution=University of Waterloo, Ontario, Canada		\|institution=University of Waterloo, Ontario, Canada
	\|status=Active		\|status=Active
	}}		}}
			{{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 ~~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 large online ~~surveys~~, ~~running into the thousands~~ of ~~respondents~~. 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 ==		== 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. ~~Earlier researchers had gestured at the same categories; Cheyne gave them empirical weight~~.

	=== 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 ~~sense~~ that something else is in the room, ~~whether glimpsed~~, ~~heard~~, ~~or simply felt~~. Cheyne linked it to amygdala~~-driven threat detection firing during conscious paralysis~~, with dream content bleeding into waking perception.

	=== 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, ~~breathlessness~~, and ~~a sharpened sense~~ of ~~danger~~ — often ~~experienced~~ as ~~something sitting on the sleeper~~. ~~Cheyne showed this typically builds on~~ the intruder ~~hallucination~~, ~~with real respiratory restriction during~~ paralysis ~~feeding hallucinated content generated by an already-aroused brain~~.

	=== 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, ~~flying~~, or ~~leaving the body~~. Cheyne tied these to disrupted vestibular processing ~~and body ownership~~ during the REM–wake transition, ~~connecting~~ them to the ~~wider literature on out~~-of~~-body experiences~~.

	== 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>

	The pattern Cheyne identified is that this three-part structure recurs, almost unchanged, across unrelated cultural traditions: the [[Old Hag]] of Newfoundland folklore recorded by David Hufford, ''kanashibari'' in Japan, djinn-visitation accounts in Islamic tradition, the European ''mare'', and modern alien abduction reports all map onto the intruder and incubus categories. The vestibular-motor category turns up in out-of-body accounts and, in some traditions, shamanic flight.		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 ~~mechanism~~, ~~dressed in~~ 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 ==		== 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 ~~psychology~~]]		* [[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:~~Researchers~~]]		[[Category:Skeptical Advocates]]
	[[Category:People]]		[[Category:People]]
			[[Category:Waterloo, Ontario]]

GaryJJSpate at 12:41, 29 July 2026

2026-07-29T12:41:47Z

← Older revision		Revision as of 12:41, 29 July 2026
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	[[Category:Researchers]]		[[Category:Researchers]]
			[[Category:People]]

GaryJJSpate at 18:48, 23 July 2026

2026-07-23T18:48:29Z

← Older revision		Revision as of 18:48, 23 July 2026
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	{{PersonInfobox		{{PersonInfobox
	\| occupation = ~~Psychologist~~, sleep researcher		\|name=Allan Cheyne
	\| known_for = Phenomenological taxonomy of [[Sleep paralysis\|sleep paralysis]] hallucinations		\|born= Canada
	\| institution = University of Waterloo, Ontario, Canada		\|occupation=psychologist, sleep researcher
	\| status = Active		\|known_for=Phenomenological taxonomy of [[Sleep paralysis\|sleep paralysis]] hallucinations
			\|institution=University of Waterloo, Ontario, Canada
			\|status=Active
	}}		}}

GaryJJSpate at 18:45, 23 July 2026

2026-07-23T18:45:14Z

← Older revision		Revision as of 18:45, 23 July 2026
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	{{PersonInfobox		{{PersonInfobox
	~~\| name = Allan Cheyne~~
	\| occupation = Psychologist, sleep researcher		\| occupation = Psychologist, sleep researcher
	\| known_for = Phenomenological taxonomy of [[Sleep paralysis\|sleep paralysis]] hallucinations		\| known_for = Phenomenological taxonomy of [[Sleep paralysis\|sleep paralysis]] hallucinations

GaryJJSpate at 18:45, 23 July 2026

2026-07-23T18:45:02Z

← Older revision		Revision as of 18:45, 23 July 2026
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	{{PersonInfobox		{{PersonInfobox
	\| name = Allan Cheyne		\| name = Allan Cheyne
	~~\| nationality = Canadian~~
	\| occupation = Psychologist, sleep researcher		\| occupation = Psychologist, sleep researcher
	\| known_for = Phenomenological taxonomy of [[Sleep paralysis\|sleep paralysis]] hallucinations		\| known_for = Phenomenological taxonomy of [[Sleep paralysis\|sleep paralysis]] hallucinations

GaryJJSpate at 18:44, 23 July 2026

2026-07-23T18:44:46Z

← Older revision		Revision as of 18:44, 23 July 2026
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	{{PersonInfobox		{{PersonInfobox
	\| name = Allan Cheyne		\| name = Allan Cheyne
	~~\| image =~~
	\| nationality = Canadian		\| nationality = Canadian
	\| occupation = Psychologist, sleep researcher		\| occupation = Psychologist, sleep researcher

GaryJJSpate at 18:44, 23 July 2026

2026-07-23T18:44:19Z

← Older revision		Revision as of 18:44, 23 July 2026
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	{{~~Infobox person~~		{{PersonInfobox
	\| name = Allan Cheyne		\| name = Allan Cheyne
	\| image =		\| image =

GaryJJSpate: Created page with "{{Infobox person | name = Allan Cheyne | image = | nationality = Canadian | occupation = Psychologist, sleep researcher | known_for = Phenomenological taxonomy of sleep paralysis hallucinations | institution = University of Waterloo, Ontario, Canada | status = Active }} '''Allan Cheyne''' is a Canadian psychologist at the University of Waterloo, Ontario, whose survey-based research into sleep paralysis produc..."

2026-07-23T18:43:32Z

Created page with "{{Infobox person | name = Allan Cheyne | image = | nationality = Canadian | occupation = Psychologist, sleep researcher | known_for = Phenomenological taxonomy of sleep paralysis hallucinations | institution = University of Waterloo, Ontario, Canada | status = Active }} '''Allan Cheyne''' is a Canadian psychologist at the University of Waterloo, Ontario, whose survey-based research into sleep paralysis produc..."

New page

{{Infobox person
| name = Allan Cheyne
| image =
| nationality = Canadian
| occupation = Psychologist, sleep researcher
| known_for = Phenomenological taxonomy of [[Sleep paralysis|sleep paralysis]] hallucinations
| institution = University of Waterloo, Ontario, Canada
| status = Active
}}

'''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.

== 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 large online surveys, running into the thousands of respondents. 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 formalised a three-part taxonomy of sleep paralysis hallucinations. Earlier researchers had gestured at the same categories; Cheyne gave them empirical weight.

=== Intruder hallucinations ===

The most commonly reported experience: an overwhelming sense that something else is in the room, whether glimpsed, heard, or simply felt. Cheyne linked it to amygdala-driven threat detection firing during conscious paralysis, with dream content bleeding into waking perception.

=== Incubus hallucinations ===

Chest pressure, breathlessness, and a sharpened sense of danger — often experienced as something sitting on the sleeper. Cheyne showed this typically builds on the intruder hallucination, with real respiratory restriction during paralysis feeding hallucinated content generated by an already-aroused brain.

=== Vestibular-motor hallucinations ===

Floating, spinning, flying, or leaving the body. Cheyne tied these to disrupted vestibular processing and body ownership during the REM–wake transition, connecting them to the wider literature on out-of-body experiences.

== Cross-cultural significance ==

The pattern Cheyne identified is that this three-part structure recurs, almost unchanged, across unrelated cultural traditions: the [[Old Hag]] of Newfoundland folklore recorded by David Hufford, ''kanashibari'' in Japan, djinn-visitation accounts in Islamic tradition, the European ''mare'', and modern alien abduction reports all map onto the intruder and incubus categories. The vestibular-motor category turns up in out-of-body accounts and, in some traditions, shamanic flight.

That consistency — one neurological mechanism, dressed in 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. 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 ==
* [[Sleep paralysis]]
* [[Hallucination]]
* [[Anomalistic psychology]]
* [[Old Hag]]

[[Category:Researchers]]