Capgras delusion
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| - | A '''''doppelgänger''''' or '''fetch''' is the [[ghost]]ly [[double]] of a living person, a sinister form of [[bilocation]]. | + | The '''Capgras delusion theory''' (or '''Capgras syndrome''') is a disorder in which a person holds a [[delusion]] that a friend, spouse, parent, or other close family member has been replaced by an identical-looking [[impostor]]. The Capgras delusion is classified as a [[delusional misidentification syndrome]], a class of delusional beliefs that involves the misidentification of people, places, or objects. It can occur in [[Acute (medical)|acute]], transient, or [[Chronic (medicine)|chronic]] forms. |
| - | In the [[vernacular]], "Doppelgänger" has come to refer (as in [[German language|German]]) to any double or [[look-alike]] of a person—most commonly an "[[evil twin]]". | ||
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| - | The word is also used to describe the sensation of having glimpsed oneself in [[peripheral vision]], in a position where there is no chance that it could have been a reflection. | ||
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| - | They are generally regarded as [[harbinger]]s of [[bad luck]]. In some traditions, a doppelgänger seen by a person's friends or relatives portends illness or danger, while seeing one's own doppelgänger is an [[omen]] of [[death]]. In Norse mythology, a ''[[vardøgr]]'' is a ghostly double who precedes a living person and is seen performing their actions in advance. | ||
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| - | The doppelgänger trope is explored by [[Hoffmann]] in his tale of [[Erasmus Spikher]] and by [[Poe]] in [[William Wilson (short story)|William Wilson]]. | ||
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| - | ==In popular culture== | ||
| - | Doppelgängers, as dark doubles of individual identities, appear in a variety of fictional works from [[Fyodor Dostoyevsky]]'s "[[The Double: A Petersburg Poem|The Double]]" to [[Al-Tayyib Salih]]'s ''[[Season of Migration to the North]]'' to [[Ralph Ellison]]'s ''[[Invisible Man]]''. In its simplest incarnation, mistaken identity is a classic trope used in literature, from ''[[Twelfth Night]]'' to ''[[A Tale of Two Cities]]''. But in these cases, the characters look similar for perfectly normal reasons, such as being siblings or simple coincidence. | ||
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| - | Some stories offer supernatural explanations for doubles. These doppelgängers are typically, but not always, [[evil]] in some way. The double will often impersonate the victim and go about ruining them, for instance through committing crimes or insulting the victim's friends. Sometimes, the double even tries to kill the original. In [[José Saramago]]'s 2001 novel ''[[The Double (novel)|The Double]]'' (original Portuguese title ''O Homem Duplicado''), both men's baser instincts come to the surface and they attempt to take advantage of each other. The torment is occasionally earned; for instance, in [[Edgar Allan Poe]]'s short story "[[William Wilson (short story)|William Wilson]]", the protagonist of questionable morality is dogged by his doppelgänger most tenaciously when his morals fail. A similar device is employed in [[Fyodor Dostoyevsky]]'s short story "[[The Double: A Petersburg Poem]]". When doppelgängers are used as harbingers of impending destruction, they are almost always supernaturally based. Some works of fantasy include [[shapeshifter]]s, as either talented individuals or as a separate race, who can mimic any person. | ||
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| - | In some myths, the doppelgänger is a version of the [[Ankou]], a personification of [[death]]; in a tradition of the [[Talmud]], to meet oneself means to meet [[God]]. | ||
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| - | Another variant, usually seen in [[science fiction]], involves [[Cloning|clone]]s, which creates a genetically identical new being without the memories and experiences of the original. Some futuristic variants in fiction duplicate living beings in their entirety, albeit sometimes with modified memories and motives. Doubles are also seen in fiction involving [[time travel]] and [[Parallel universe (fiction)|parallel universes]], as in the motion picture ''[[Back to the Future Part II]]''. In this case, the doppelgänger really ''is'' the doubled person, but from a different point in time along the same timeline. | ||
| - | In the TV series [[The Vampire Diaries]] Elena Gilbert is a doppelgänger of her ancestor Katherine Pierce (Katerina Petrova). And in the feature film, [[Black Swan (film)|Black Swan]], Natalie Portman's character experiences crossing paths with her doppelgänger several times, as well as confusing a similar looking girl with her doppelgänger throughout the film. | ||
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| - | ==See also== | ||
| - | * [[Alter ego]] | ||
| - | * [[Bilocation]] | ||
| - | * [[Body double]] | ||
| - | * [[Capgras delusion]] | ||
| - | * [[Evil twin]] | ||
| - | * [[Fetch (folklore)]] | ||
| - | * [[Ghost]] | ||
| - | * [[Homunculus]] | ||
| - | * [[Look-alike]] | ||
| - | * [[Syndrome of subjective doubles]] | ||
| - | * [[Vardøger]] | ||
| - | * [[Dharmakāya]] | ||
| ==See also== | ==See also== | ||
| - | *''[[Der Doppelgänger]]'' ([[1914]]) by [[Otto Rank]] | + | *[[Cognitive neuropsychiatry]] |
| - | *[[Alter ego]] | + | *[[Face perception]] |
| - | *[[Body double]] | + | *[[Fregoli delusion]] |
| - | *[[Look-alike]] | + | *[[Joseph Capgras]] |
| - | *[[Evil twin]] | + | *[[Monothematic delusion]] |
| - | *[[Syndrome of subjective doubles]] | + | *[[Prosopagnosia]], or face-blindness |
| - | *''[[Strange Case of Dr Jekyll and Mr Hyde]]'' | + | *[[Changeling]] |
| - | *[[Apollonian and Dionysian]] | + | *[[Doppelgänger]] |
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The Capgras delusion theory (or Capgras syndrome) is a disorder in which a person holds a delusion that a friend, spouse, parent, or other close family member has been replaced by an identical-looking impostor. The Capgras delusion is classified as a delusional misidentification syndrome, a class of delusional beliefs that involves the misidentification of people, places, or objects. It can occur in acute, transient, or chronic forms.
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See also
- Cognitive neuropsychiatry
- Face perception
- Fregoli delusion
- Joseph Capgras
- Monothematic delusion
- Prosopagnosia, or face-blindness
- Changeling
- Doppelgänger
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