Déjà vu: Difference between revisions

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'''Deja~~-vu~~''' is a common phrase from the French language which translates literally into “already seen”. ~~This~~ is a well documented phenomenon that can commonly occur throughout both sober living and under the influence of [[hallucinogens]]~~. It can be described as having the strong sensation that the current event or situation has already been experienced at some point within the past when, in fact, it hasn't~~.

'''Déjà Vu''' (or '''Deja Vu''') is defined as as any sudden inappropriate impression of familiarity of a present experience with an undefined past.<ref name="OConnor2021">{{cite journal | vauthors=((O’Connor, A. R.)), ((Wells, C.)), ((Moulin, C. J. A.)) | journal=Memory | title=Déjà vu and other dissociative states in memory | volume=29 | issue=7 | pages=835–842 | date=9 August 2021 | url=https://www.tandfonline.com/doi/full/10.1080/09658211.2021.1911197 | issn=0965-8211 | doi=10.1080/09658211.2021.1911197 | access-date=16 June 2022}}</ref><ref>{{cite journal | vauthors=((Funkhouser, A. T.)), ((Schredl, M.)) | title=The frequency of déjà vu (déjà rêve) and the effects of age, dream recall frequency and personality factors | date= 2010 | url=http://journals.ub.uni-heidelberg.de/index.php/IJoDR/article/view/473 | doi=10.11588/IJODR.2010.1.473 | access-date=16 June 2022}}</ref><ref>{{cite journal | vauthors=((Brown, A. S.)) | journal=Psychological Bulletin | title=A review of the déjà vu experience. | volume=129 | issue=3 | pages=394–413 | date= 2003 | url=http://doi.apa.org/getdoi.cfm?doi=10.1037/0033-2909.129.3.394 | issn=1939-1455 | doi=10.1037/0033-2909.129.3.394}}</ref><ref>{{cite journal | vauthors=((Wild, E.)) | journal=Journal of Neurology | title=Deja vu in neurology | volume=252 | issue=1 | pages=1–7 | date= January 2005 | url=http://link.springer.com/10.1007/s00415-005-0677-3 | issn=0340-5354 | doi=10.1007/s00415-005-0677-3 | access-date=16 June 2022}}</ref> Its two critical components are an intense feeling of familiarity, and a certainty that the current moment is novel.<ref>{{cite journal | vauthors=((O’Connor, A. R.)), ((Moulin, C. J. A.)) | journal=Current Psychiatry Reports | title=Recognition Without Identification, Erroneous Familiarity, and Déjà Vu | volume=12 | issue=3 | pages=165–173 | date= June 2010 | url=http://link.springer.com/10.1007/s11920-010-0119-5 | issn=1523-3812 | doi=10.1007/s11920-010-0119-5}}</ref> This term is a common phrase from the French language which translates literally into “already seen”. It is a well-documented phenomenon that can commonly occur throughout both sober living and under the influence of [[hallucinogens]].

~~Certain substances~~ are commonly capable of inducing spontaneous and often prolonged states of mild to intense sensations of ~~deja-~~vu. This ~~provides~~ one with an overwhelming sense that they have “been here before”. The sensation is often accompanied by a ~~false~~ feeling of familiarity with ~~the effects of the substance itself,~~ the current location or setting, the current physical actions being performed, ~~and~~ the situation as a whole.

Within the context of [[psychoactive substance]] usage, many compounds are commonly capable of inducing spontaneous and often prolonged states of mild to intense sensations of déjà vu. This can provide one with an overwhelming sense that they have “been here before”. The sensation is also often accompanied by a feeling of familiarity with the current location or setting, the current physical actions being performed, the situation as a whole, or the effects of the substance itself.

This effect is often triggered despite the fact that during the experience of it ~~one~~ can be rationally aware that the circumstances of the “previous” experience (when, where, and how the earlier experience occurred) are uncertain or believed to be impossible.

This effect is often triggered despite the fact that during the experience of it, the person can be rationally aware that the circumstances of the “previous” experience (when, where, and how the earlier experience occurred) are uncertain or believed to be impossible.

Déjà vu is often accompanied by other coinciding effects such as [[olfactory hallucination|olfactory hallucinations]] and [[derealization]].<ref>{{cite journal | vauthors=((Warren-Gash, C.)), ((Zeman, A.)) | journal=Journal of Neurology, Neurosurgery & Psychiatry | title=Is there anything distinctive about epileptic deja vu? | volume=85 | issue=2 | pages=143–147 | date=1 February 2014 | url=https://jnnp.bmj.com/lookup/doi/10.1136/jnnp-2012-303520 | issn=0022-3050 | doi=10.1136/jnnp-2012-303520 | access-date=16 June 2022}}</ref> It is most commonly induced under the influence of [[dosage#common|moderate]] [[dosage|dosages]] of [[hallucinogen|hallucinogenic]] compounds,<ref>{{Citation | vauthors=((Doss, M. K.)), ((Samaha, J.)), ((Barrett, F. S.)), ((Griffiths, R. R.)), ((Wit, H. de)), ((Gallo, D. A.)), ((Koen, J. D.)) | year=2022 | title=Unique Effects of Sedatives, Dissociatives, Psychedelics, Stimulants, and Cannabinoids on Episodic Memory: A Review and Reanalysis of Acute Drug Effects on Recollection, Familiarity, and Metamemory | publisher=Neuroscience | url=http://biorxiv.org/lookup/doi/10.1101/2022.05.20.492842 | access-date=16 June 2022}}</ref> such as [[psychedelic|psychedelics]],<ref>{{cite journal | vauthors=((Luke, D. P.)) | journal=Journal of Parapsychology | title=Psychedelic substances and paranormal phenomena: a review of the research | volume=72 | pages=77–107 | date= 2008 | url=https://gala.gre.ac.uk/id/eprint/3896/ | issn=0022-3387 | access-date=16 June 2022}}</ref> [[cannabinoid|cannabinoids]],<ref>{{cite journal | vauthors=((Basu, D.)), ((Malhotra, A.)), ((Bhagat, A.)), ((Varma, V. K.)) | journal=European Addiction Research | title=Cannabis Psychosis and Acute Schizophrenia | volume=5 | issue=2 | pages=71–73 | date= 1999 | url=https://www.karger.com/Article/FullText/18968 | issn=1022-6877 | doi=10.1159/000018968 | access-date=16 June 2022}}</ref> and [[dissociative|dissociatives]].

</onlyinclude>

===Analysis===

It is worth noting that the experience of Déjà vu is extremely common in people who are completely sober. For example, a 2003 review found that roughly two-thirds of the general population have had déjà vu experiences.<ref>{{cite journal | vauthors=((Brown, A. S.)) | journal=Current Directions in Psychological Science | title=The Déjà Vu Illusion | volume=13 | issue=6 | pages=256–259 | date= December 2004 | url=http://journals.sagepub.com/doi/10.1111/j.0963-7214.2004.00320.x | issn=0963-7214 | doi=10.1111/j.0963-7214.2004.00320.x}}</ref> Other studies confirm that déjà vu is a common experience in healthy individuals, with between 60% and 70% of individuals reporting it, particularly within those who are between the ages of 15 and 25.

Scientific explanations of déjà vu typically conclude that this state of mind is as an anomaly of memory, which creates the distinct impression that an experience is "being recalled" when it is actually occurring within the present moment. This explanation is supported by the fact that the sense of "recollection" at the time is strong in most cases, but the circumstances of the "previous" experience (when, where, and how the earlier experience occurred) are believed to be improbable or impossible.

===Psychoactive substances===

Compounds ~~from~~ our [[psychoactive substance index]] which ~~our~~ may cause this effect include:

Compounds within our [[psychoactive substance index]] which may cause this effect include:

{{#ask:[[Category:Psychoactive ~~substances~~]][[Effect::~~Deja-Vu~~]]|format=ul|Columns=2}}

{{#ask:[[Category:Psychoactive substance]][[Effect::Déjà vu]]|format=ul|Columns=2}}

===Experience reports===

~~Anecdotal~~ reports which describe this effect with our [[experience index]] include:

Annectdotal reports which describe this effect with our [[experience index]] include:

{{#ask:[[Category:Experience]][[Effect::~~Deja-Vu~~]]|format=ul|Columns=2}}

{{#ask:[[Category:Experience]][[Effect::Déjà vu]]|format=ul|Columns=2}}

===See also===

*[[Responsible use]]

*[[Subjective effects index]]

*[[Psychedelics#Subjective_effects|Psychedelics - Subjective effects]]

*[[Dissociatives#Subjective_effects|Dissociatives - Subjective effects]]

*[[Deliriants#Subjective_effects|Deliriants - Subjective effects]]

[[Category:~~Cognitive~~]] [[Category:~~Novel~~]] [[~~Cognitive~~:~~Effect~~]]

===External links===

* [https://en.wikipedia.org/wiki/D%C3%A9j%C3%A0_vu Déjà vu (Wikipedia)]

===References===

[[Category:Effect]]

[[Category:Cognitive]]

[[Category:Disconnective]]

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 <onlyinclude>
-'''Deja-vu''' is a common phrase from the French language which translates literally into “already seen”. This is a well documented phenomenon that can commonly occur throughout both sober living and under the influence of [[hallucinogens]]. It can be described as having the strong sensation that the current event or situation has already been experienced at some point within the past when, in fact, it hasn't.
+'''Déjà Vu''' (or '''Deja Vu''') is defined as as any sudden inappropriate impression of familiarity of a present experience with an undefined past.<ref name="OConnor2021">{{cite journal | vauthors=((O’Connor, A. R.)), ((Wells, C.)), ((Moulin, C. J. A.)) | journal=Memory | title=Déjà vu and other dissociative states in memory | volume=29 | issue=7 | pages=835–842 | date=9 August 2021 | url=https://www.tandfonline.com/doi/full/10.1080/09658211.2021.1911197 | issn=0965-8211 | doi=10.1080/09658211.2021.1911197 | access-date=16 June 2022}}</ref><ref>{{cite journal | vauthors=((Funkhouser, A. T.)), ((Schredl, M.)) | title=The frequency of déjà vu (déjà rêve) and the effects of age, dream recall frequency and personality factors | date= 2010 | url=http://journals.ub.uni-heidelberg.de/index.php/IJoDR/article/view/473 | doi=10.11588/IJODR.2010.1.473 | access-date=16 June 2022}}</ref><ref>{{cite journal | vauthors=((Brown, A. S.)) | journal=Psychological Bulletin | title=A review of the déjà vu experience. | volume=129 | issue=3 | pages=394–413 | date= 2003 | url=http://doi.apa.org/getdoi.cfm?doi=10.1037/0033-2909.129.3.394 | issn=1939-1455 | doi=10.1037/0033-2909.129.3.394}}</ref><ref>{{cite journal | vauthors=((Wild, E.)) | journal=Journal of Neurology | title=Deja vu in neurology | volume=252 | issue=1 | pages=1–7 | date= January 2005 | url=http://link.springer.com/10.1007/s00415-005-0677-3 | issn=0340-5354 | doi=10.1007/s00415-005-0677-3 | access-date=16 June 2022}}</ref> Its two critical components are an intense feeling of familiarity, and a certainty that the current moment is novel.<ref>{{cite journal | vauthors=((O’Connor, A. R.)), ((Moulin, C. J. A.)) | journal=Current Psychiatry Reports | title=Recognition Without Identification, Erroneous Familiarity, and Déjà Vu | volume=12 | issue=3 | pages=165–173 | date= June 2010 | url=http://link.springer.com/10.1007/s11920-010-0119-5 | issn=1523-3812 | doi=10.1007/s11920-010-0119-5}}</ref> This term is a common phrase from the French language which translates literally into “already seen”. It is a well-documented phenomenon that can commonly occur throughout both sober living and under the influence of [[hallucinogens]].
-Certain substances are commonly capable of inducing spontaneous and often prolonged states of mild to intense sensations of deja-vu. This provides one with an overwhelming sense that they have “been here before”. The sensation is often accompanied by a false feeling of familiarity with the effects of the substance itself, the current location or setting, the current physical actions being performed, and the situation as a whole.
+Within the context of [[psychoactive substance]] usage, many compounds are commonly capable of inducing spontaneous and often prolonged states of mild to intense sensations of déjà vu. This can provide one with an overwhelming sense that they have “been here before”. The sensation is also often accompanied by a feeling of familiarity with the current location or setting, the current physical actions being performed, the situation as a whole, or the effects of the substance itself.
-This effect is often triggered despite the fact that during the experience of it one can be rationally aware that the circumstances of the “previous” experience (when, where, and how the earlier experience occurred) are uncertain or believed to be impossible.
+This effect is often triggered despite the fact that during the experience of it, the person can be rationally aware that the circumstances of the “previous” experience (when, where, and how the earlier experience occurred) are uncertain or believed to be impossible.
+Déjà vu is often accompanied by other coinciding effects such as [[olfactory hallucination|olfactory hallucinations]] and [[derealization]].<ref>{{cite journal | vauthors=((Warren-Gash, C.)), ((Zeman, A.)) | journal=Journal of Neurology, Neurosurgery & Psychiatry | title=Is there anything distinctive about epileptic deja vu? | volume=85 | issue=2 | pages=143–147 | date=1 February 2014 | url=https://jnnp.bmj.com/lookup/doi/10.1136/jnnp-2012-303520 | issn=0022-3050 | doi=10.1136/jnnp-2012-303520 | access-date=16 June 2022}}</ref> It is most commonly induced under the influence of [[dosage#common|moderate]] [[dosage|dosages]] of [[hallucinogen|hallucinogenic]] compounds,<ref>{{Citation | vauthors=((Doss, M. K.)), ((Samaha, J.)), ((Barrett, F. S.)), ((Griffiths, R. R.)), ((Wit, H. de)), ((Gallo, D. A.)), ((Koen, J. D.)) | year=2022 | title=Unique Effects of Sedatives, Dissociatives, Psychedelics, Stimulants, and Cannabinoids on Episodic Memory: A Review and Reanalysis of Acute Drug Effects on Recollection, Familiarity, and Metamemory | publisher=Neuroscience | url=http://biorxiv.org/lookup/doi/10.1101/2022.05.20.492842 | access-date=16 June 2022}}</ref> such as [[psychedelic|psychedelics]],<ref>{{cite journal | vauthors=((Luke, D. P.)) | journal=Journal of Parapsychology | title=Psychedelic substances and paranormal phenomena: a review of the research | volume=72 | pages=77–107 | date= 2008 | url=https://gala.gre.ac.uk/id/eprint/3896/ | issn=0022-3387 | access-date=16 June 2022}}</ref> [[cannabinoid|cannabinoids]],<ref>{{cite journal | vauthors=((Basu, D.)), ((Malhotra, A.)), ((Bhagat, A.)), ((Varma, V. K.)) | journal=European Addiction Research | title=Cannabis Psychosis and Acute Schizophrenia | volume=5 | issue=2 | pages=71–73 | date= 1999 | url=https://www.karger.com/Article/FullText/18968 | issn=1022-6877 | doi=10.1159/000018968 | access-date=16 June 2022}}</ref> and [[dissociative|dissociatives]].
 </onlyinclude>
+===Analysis===
+It is worth noting that the experience of Déjà vu is extremely common in people who are completely sober. For example, a 2003 review found that roughly two-thirds of the general population have had déjà vu experiences.<ref>{{cite journal | vauthors=((Brown, A. S.)) | journal=Current Directions in Psychological Science | title=The Déjà Vu Illusion | volume=13 | issue=6 | pages=256–259 | date= December 2004 | url=http://journals.sagepub.com/doi/10.1111/j.0963-7214.2004.00320.x | issn=0963-7214 | doi=10.1111/j.0963-7214.2004.00320.x}}</ref> Other studies confirm that déjà vu is a common experience in healthy individuals, with between 60% and 70% of individuals reporting it, particularly within those who are between the ages of 15 and 25.
+Scientific explanations of déjà vu typically conclude that this state of mind is as an anomaly of memory, which creates the distinct impression that an experience is "being recalled" when it is actually occurring within the present moment. This explanation is supported by the fact that the sense of "recollection" at the time is strong in most cases, but the circumstances of the "previous" experience (when, where, and how the earlier experience occurred) are believed to be improbable or impossible.
 ===Psychoactive substances===
-Compounds from our [[psychoactive substance index]] which our may cause this effect include:
+Compounds within our [[psychoactive substance index]] which may cause this effect include:
-{{#ask:[[Category:Psychoactive substances]][[Effect::Deja-Vu]]|format=ul|Columns=2}}
+{{#ask:[[Category:Psychoactive substance]][[Effect::Déjà vu]]|format=ul|Columns=2}}
 ===Experience reports===
-Anecdotal reports which describe this effect with our [[experience index]] include:
+Annectdotal reports which describe this effect with our [[experience index]] include:
-{{#ask:[[Category:Experience]][[Effect::Deja-Vu]]|format=ul|Columns=2}}
+{{#ask:[[Category:Experience]][[Effect::Déjà vu]]|format=ul|Columns=2}}
 ===See also===
+*[[Responsible use]]
 *[[Subjective effects index]]
 *[[Psychedelics#Subjective_effects|Psychedelics - Subjective effects]]
 *[[Dissociatives#Subjective_effects|Dissociatives - Subjective effects]]
 *[[Deliriants#Subjective_effects|Deliriants - Subjective effects]]
-[[Category:Cognitive]] [[Category:Novel]] [[Cognitive:Effect]]
+===External links===
+* [https://en.wikipedia.org/wiki/D%C3%A9j%C3%A0_vu Déjà vu (Wikipedia)]
+===References===
+<references/>
+[[Category:Effect]]
+[[Category:Cognitive]]
+[[Category:Disconnective]]