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{{Short description|Psychotic disorder}}
{{other uses}}
{{redirect2|Paranoid|Paranoiac||Paranoid (disambiguation)|and|Paranoiac (film){{!}}''Paranoiac'' (film)}}
{{Infobox medical condition (new)
| name = Paranoia
| synonyms = Paranoid ([[adjective]])
| pronounce = {{IPAc-en|ˌ|p|ær|ə|ˈ|n|ɔɪ|ə}}
| field = [[Psychiatry]], [[clinical psychology]]
| symptoms = [[Distrust]], [[false accusations]], [[anxiety]], [[suspicion (emotion)|suspicion]]
| complications = 
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| duration = 
| types = 
| causes = 
| risks = 
| diagnosis = 
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}}

'''Paranoia''' is an instinct or thought process that is believed to be heavily influenced by [[anxiety]], [[suspicion (emotion)|suspicion]], or [[fear]], often to the point of [[delusion]] and [[irrationality]].<ref>[http://dictionary.reference.com/browse/paranoia World English Dictionary] {{Webarchive|url=https://web.archive.org/web/20180528064031/http://dictionary.reference.com/browse/paranoia |date=2018-05-28 }} (Collins English Dictionary – Complete & Unabridged 10th Edition, 2009, William Collins Sons & Co. Ltd.) 3. informal sense: ''intense fear or suspicion, esp when unfounded''</ref> Paranoid thinking typically includes [[persecutory]] beliefs, or beliefs of [[conspiracy]] concerning a perceived threat towards oneself (e.g., ''"Everyone is out to get me"''). Paranoia is distinct from [[phobia]]s, which also involve irrational fear, but usually no blame.

Making false accusations and the general distrust of other people also frequently accompany paranoia.<ref>{{cite web |url=https://www.livescience.com/3064-freak-paranoia-common.html |title=Don't Freak Out: Paranoia Quite Common |website=[[Live Science]] |publisher=[[Associated Press]] |date=November 12, 2008 |access-date=September 16, 2018 }}</ref> For example, a paranoid person might believe an incident was intentional when most people would view it as an accident or coincidence. Paranoia is a central symptom of [[psychosis]].<ref name="Green08">Green, C., Freeman, D., Kuipers, E., Bebbington, P., Fowler, D., Dunn, G., & Garety, P. (2008). Measuring ideas of persecution and social reference: the Green et al. Paranoid Thought Scales (GPTS). ''Psychological Medicine, 38'', 101 – 111.</ref>

==Signs and symptoms==
A common symptom of paranoia is [[attribution bias]]. These individuals typically have a biased perception of reality, often exhibiting more hostile beliefs than average.<ref name="bentall-taylor-2006">Bentall and Taylor (2006), p. 289</ref> A paranoid person may view someone else's accidental behavior as though it is intentional or signifies a threat.

An investigation of a non-clinical paranoid population found that characteristics such as feeling powerless and depressed, isolating oneself, and relinquishing activities, were associated with more frequent paranoia.<ref>Freeman et al. (2005)</ref>
Some scientists have created different subtypes for the various symptoms of paranoia, including erotic, persecutory, litigious, and exalted.<ref>Deutsch and Fishman p. 1414-1415</ref>

Some research suggests that symptoms of [[paranoid personality disorder]] are associated with a higher number of divorces, likely due to how paranoid patterns of thinking hinder relationships.<ref>{{Cite journal |last1=Disney |first1=Krystle L. |last2=Weinstein |first2=Yana |last3=Oltmanns |first3=Thomas F. |date=December 2012 |title=Personality disorder symptoms are differentially related to divorce frequency |journal=Journal of Family Psychology |volume=26 |issue=6 |pages=959–965 |doi=10.1037/a0030446 |issn=1939-1293 |pmc=3569846 |pmid=23244459}}</ref> This seems to fall in line with some older sources, which allege that paranoid individuals tend to be of a single status.<ref>Deutch and Fishman (1963), p.1416</ref>

Some researchers have arranged types of paranoia by commonality. The least common types of paranoia at the very top of the hierarchy would be those involving more serious threats. [[Social anxiety]] is at the bottom of this hierarchy as the most frequently exhibited level of paranoia.<ref>Freeman et al. (2005), p.433</ref>

==Causes==
===Social and environmental===
Social circumstances appear to be highly influential on paranoid beliefs. According to a mental health survey distributed to residents of [[Ciudad Juárez|Ciudad Juárez, Chihuahua]] (in Mexico) and [[El Paso, Texas]] (in the United States), paranoid beliefs seem to be associated with feelings of powerlessness and [[Victim mentality|victimization]], enhanced by social situations. Paranoid symptoms were associated with an attitude of mistrust and an external locus of control. Citing research showing that women and those with lower socioeconomic status are more prone to locating locus of control externally, the researchers suggested that women may be especially affected by the effects of socioeconomic status on paranoia.<ref>Mirowski and Ross (1983)</ref>

Surveys have revealed that paranoia can develop from difficult parental relationships and untrustworthy environments, for instance those that were highly disciplinary, strict, and unstable, could contribute to paranoia. Some sources have also noted that indulging and pampering the child could contribute to greater paranoia, via disrupting the child's understanding of their relationship with the world.<ref name=D&F >Deutsch and Fishman (1963), p. 1408</ref> Experiences found to enhance or create paranoia included frequent disappointment, stress, and a sense of hopelessness.<ref>Deutsch and Fishman (1963), p. 1412</ref>

Discrimination has also been reported as a potential predictor of paranoid delusions. Such reports that paranoia seemed to appear more in older patients who had experienced greater discrimination throughout their lives. Immigrants are more subject to some forms of psychosis than the general population, which may be related to more frequent experiences of discrimination and humiliation.<ref>Bentall and Taylor (2006), p. 280</ref>

===Psychological===
Many more mood-based symptoms, for example [[grandiosity]] and guilt, may underlie functional paranoia.<ref>{{Cite journal|last=Lake|first=C. R.|date=2008-11-01|title=Hypothesis: Grandiosity and Guilt Cause Paranoia; Paranoid Schizophrenia is a Psychotic Mood Disorder; a Review|journal=Schizophrenia Bulletin|language=en|volume=34|issue=6|pages=1151–1162|doi=10.1093/schbul/sbm132|issn=0586-7614|pmc=2632512|pmid=18056109}}</ref>

Colby (1981) defined paranoid cognition as "persecutory delusions and false beliefs whose propositional content clusters around ideas of being harassed, threatened, harmed, subjugated, persecuted, accused, mistreated, killed, wronged, tormented, disparaged, vilified, and so on, by malevolent others, either specific individuals or groups" (p.&nbsp;518).
Three components of paranoid cognition have been identified by Robins & Post: "a) suspicions without enough basis that others are exploiting, harming, or deceiving them; b) preoccupation with unjustified doubts about the loyalty, or trustworthiness, of friends or associates; c) reluctance to confide in others because of unwarranted fear that the information will be used maliciously against them" (1997, p.&nbsp;3).

Paranoid cognition has been conceptualized by clinical psychology almost exclusively in terms of psychodynamic constructs and dispositional variables. From this point of view, paranoid cognition is a manifestation of an intra-psychic conflict or disturbance. For instance, Colby (1981) suggested that the biases of blaming others for one's problems serve to alleviate the distress produced by the feeling of being humiliated, and helps to repudiate the belief that the self is to blame for such incompetence. This intra-psychic perspective emphasizes that the cause of paranoid cognitions is inside the head of the people (social perceiver), and dismisses the possibility that paranoid cognition may be related to the social context in which such cognitions are embedded. This point is extremely relevant because when origins of distrust and suspicion (two components of paranoid cognition) are studied many researchers have accentuated the importance of social interaction, particularly when social interaction has gone awry. Even more, a model of trust development pointed out that trust increases or decreases as a function of the cumulative history of interaction between two or more persons.<ref>Deutsch, 1958</ref>

Another relevant difference can be discerned among "pathological and non-pathological forms of trust and distrust". According to Deutsch, the main difference is that non-pathological forms are flexible and responsive to changing circumstances. Pathological forms reflect exaggerated perceptual biases and judgmental predispositions that can arise and perpetuate them, are reflexively caused errors similar to a [[self-fulfilling prophecy]].

It has been suggested that a "hierarchy" of paranoia exists, extending from mild social evaluative concerns, through ideas of social reference, to persecutory beliefs concerning mild, moderate, and severe threats.<ref name=Freeman05>Freeman, D., Garety, P., Bebbington, P., Smith, B., Rollinson, R., Fowler, D., Kuipers, E., Ray, K., & Dunn, G. (2005). Psychological investigation of the structure of paranoia in a non-clinical population. ''British Journal of Psychiatry 186'', 427 – 435.</ref>

===Physical===
A paranoid reaction may be caused from a decline in brain circulation as a result of high blood pressure or hardening of the arterial walls.<ref name=D&F/>

Drug-induced paranoia, associated with [[cannabis (drug)|cannabis]] and stimulants like [[amphetamines]] or [[methamphetamine]], has much in common with schizophrenic paranoia; the relationship has been under investigation since 2012. Drug-induced paranoia has a better prognosis than schizophrenic paranoia once the drug has been removed.<ref>{{cite journal|title=Amphetamine-induced psychosis – a separate diagnostic entity or primary psychosis triggered in the vulnerable?|journal=BMC Psychiatry|volume=12|article-number=221|pmc=3554477|year=2012|doi=10.1186/1471-244X-12-221|pmid=23216941|last1=Bramness|first1=J. G|last2=Gundersen|first2=Øystein Hoel|last3=Guterstam|first3=J|last4=Rognli|first4=E. B|last5=Konstenius|first5=M|last6=Løberg|first6=E. M|last7=Medhus|first7=S|last8=Tanum|first8=L|last9=Franck|first9=J |doi-access=free }}</ref> For further information, see [[stimulant psychosis]] and [[substance-induced psychosis]].

Based on data obtained by the Dutch NEMESIS project in 2005, there was an association between impaired hearing and the onset of symptoms of psychosis, which was based on a five-year follow up. Some older studies have actually declared that a state of paranoia can be produced in patients that were under a hypnotic state of deafness. This idea however generated much skepticism during its time.<ref name="paranoia">Bentall and Taylor (2006), p.281</ref>

==Diagnosis==
In the [[DSM-IV-TR]], paranoia is diagnosed in the form of:<ref>[[American Psychiatric Association]]. ''[[Diagnostic and Statistical Manual of Mental Disorders]]''</ref>
* [[Paranoid personality disorder]]<ref>[[American Psychiatric Association]]. ''[[Diagnostic and Statistical Manual of Mental Disorders]]'' p.690</ref> ({{ICD10|F|60|0|f|60}})
* [[Paranoid schizophrenia]] (a subtype of [[schizophrenia]]) ({{ICD10|F|20|0|f|20}})
* The [[persecutory delusions|persecutory]] type of [[delusional disorder]]<ref>[[American Psychiatric Association]]. ''[[Diagnostic and Statistical Manual of Mental Disorders]]'' p.325</ref> ({{ICD10|F|22|8|f|20}})

According to [[Clinical psychology|clinical psychologist]] P. J. McKenna, "As a noun, paranoia denotes a disorder which has been argued in and out of existence, and whose clinical features, course, boundaries, and virtually every other aspect of which is controversial. Employed as an adjective, paranoid has become attached to a diverse set of presentations, from paranoid schizophrenia, through paranoid depression, to paranoid personality&mdash;not to mention a motley collection of paranoid 'psychoses', 'reactions', and 'states'&mdash;and this is to restrict discussion to [[functional disorders]]. Even when abbreviated down to the prefix para-, the term crops up causing trouble as the contentious but stubbornly persistent concept of [[paraphrenia]]".<ref>McKenna (1997), p.238</ref>

At least 50% of the diagnosed cases of [[schizophrenia]] experience delusions of reference and delusions of persecution.<ref name=Sartorius86>Sartorius, N., Jablensky, A., Korten, A., Ernberg, G., Anker, M., Cooper, JE., & Day, R. (1986). Early manifestations and first-contact incidence of schizophrenia in different cultures. ''Psychological Medicine, 16'', 909 – 928.</ref><ref name=Cutting97>Cutting, J. (1997). ''Principles of Psychopathology : Two Worlds–Two Minds–Two Hemispheres.'' Oxford University Press: Oxford.</ref> Paranoia perceptions and behavior may be part of many mental illnesses, such as depression and dementia, but they are more prevalent in three mental disorders: [[paranoid schizophrenia]], [[delusional disorder]] ([[Persecutory delusion|persecutory type]]), and [[paranoid personality disorder]].

==Treatment==
Paranoid [[delusion]]s are often treated with [[Antipsychotic|antipsychotic medication]], which exert a medium effect size.<ref>{{cite journal | vauthors = Huhn M, Nikolakopoulou A, Schneider-Thoma J, Krause M, Samara M, Peter N, Arndt T, Bäckers L, Rothe P, Cipriani A, Davis J, Salanti G, Leucht S | display-authors = 6 | title = Comparative efficacy and tolerability of 32 oral antipsychotics for the acute treatment of adults with multi-episode schizophrenia: a systematic review and network meta-analysis | language = English | journal = Lancet | volume = 394 | issue = 10202 | pages = 939–951 | date = September 2019 | pmid = 31303314 | pmc = 6891890 | doi = 10.1016/S0140-6736(19)31135-3 }}</ref> [[Cognitive behavioral therapy]] (CBT) lessens paranoid delusions relative to control conditions according to a [[meta-analysis]].<ref>{{cite journal | vauthors = Mehl S, Werner D, Lincoln TM | title = Corrigendum: Does Cognitive Behavior Therapy for psychosis (CBTp) show a sustainable effect on delusions? A meta-analysis | journal = Frontiers in Psychology | volume = 10 | article-number = 1868 | date = 2019-08-28 | pmid = 31555162 | pmc = 6724716 | doi = 10.3389/fpsyg.2019.01868 | doi-access = free }}</ref> A [[meta-analysis]] of 43 studies reported that [[metacognitive training]] (MCT) reduces (paranoid) delusions at a medium to large effect size relative to control conditions.<ref>{{cite journal | vauthors = Penney D, Sauvé G, Mendelson D, Thibaudeau É, Moritz S, Lepage M | title = Immediate and Sustained Outcomes and Moderators Associated With Metacognitive Training for Psychosis: A Systematic Review and Meta-analysis | journal = JAMA Psychiatry | date = March 2022 | volume = 79 | issue = 5 | pages = 417–429 | pmid = 35320347 | pmc = 8943641 | doi = 10.1001/jamapsychiatry.2022.0277 }}</ref>

==History==
The word ''paranoia'' comes from the [[Greek language|Greek]] παράνοια (''paránoia''), "[[Insanity|madness]]",<ref>[https://www.perseus.tufts.edu/hopper/text?doc=Perseus%3Atext%3A1999.04.0057%3Aentry%3Dpara%2Fnoia^ παράνοια] {{Webarchive|url=https://web.archive.org/web/20210308144100/http://www.perseus.tufts.edu/hopper/text?doc=Perseus%3Atext%3A1999.04.0057%3Aentry%3Dpara%2Fnoia%5E |date=2021-03-08 }},
Henry George Liddell, Robert Scott, ''A Greek-English Lexicon'', on perseus Digital Library</ref> and that from παρά (''pará''), "beside, by"<ref>[https://www.perseus.tufts.edu/hopper/text?doc=Perseus%3Atext%3A1999.04.0057%3Aentry%3Dpara%2F παρά] {{Webarchive|url=https://web.archive.org/web/20210227044414/http://www.perseus.tufts.edu/hopper/text?doc=Perseus%3Atext%3A1999.04.0057%3Aentry%3Dpara%2F |date=2021-02-27 }}, Henry George Liddell, Robert Scott, ''A Greek-English Lexicon'', on perseus Digital Library</ref> and νόος (''nóos''), "mind".<ref>[https://www.perseus.tufts.edu/hopper/text?doc=Perseus%3Atext%3A1999.04.0057%3Aentry%3Dno%2Fos νόος] {{Webarchive|url=https://web.archive.org/web/20210308075312/http://www.perseus.tufts.edu/hopper/text?doc=Perseus%3Atext%3A1999.04.0057%3Aentry%3Dno%2Fos |date=2021-03-08 }}, Henry George Liddell, Robert Scott, ''A Greek-English Lexicon'', on perseus Digital Library</ref> The term was used to describe a mental illness in which a delusional belief is the sole or most prominent feature. In this definition, the belief does not have to be persecutory to be classified as paranoid, so any number of delusional beliefs can be classified as paranoia.<ref>{{Cite journal | doi=10.1177/0957154X0001104103| pmid=11624609|title = Delusional diagnosis? The history of paranoia as a disease concept in the modern era| journal=History of Psychiatry| volume=11| issue=41| pages=037–69|year = 2000|last1 = Dowbiggin|first1 = Ian| s2cid=29886856}}</ref> For example, a person who has the sole delusional belief that they are an important religious figure would be classified by Kraepelin as having "pure paranoia". The word "paranoia" is associated from the Greek word "para-noeo".<ref name=":0">{{Cite web|url=http://inhn.org/archives/ban-collection/paranoia.html|title=Paranoia: Historical development of the diagnostic concept, An unexplored area of research in neuropsychopharmacology|author1-link=Thomas A. Ban |last=Ban |first=Thomas |website=International Network for the History of Neuropsychopharmacology |date=30 March 2016 |access-date=8 June 2020| archive-date=19 November 2021| archive-url=https://web.archive.org/web/20211119215617/https://inhn.org/archives/ban-collection/paranoia.html |url-status=dead}}</ref> Its meaning was "derangement", or "departure from the normal". However, the word was used strictly and other words were used such as "insanity" or "crazy", as these words were introduced by [[Aulus Cornelius Celsus]]. The term "paranoia" first made an appearance during plays of Greek tragedians, and was also used by philosophers such as Plato and Hippocrates. Nevertheless, the word "paranoia" was the equivalent of "delirium" or "high". Eventually, the term fell out of use for two millennia. "Paranoia" was revived in the 18th century, appearing in the works of [[nosology|nosologists]] such as [[François Boissier de Sauvage]] (1759) and Rudolph August Vogel (1772).<ref name=":0" />

According to Michael Phelan, Padraig Wright, and Julian Stern (2000),<ref>Phelan, Wright, and Stern (2000)</ref> paranoia and [[paraphrenia]] are debated entities that were detached from ''[[dementia praecox]]'' by Kraepelin, who explained paranoia as a continuous systematized delusion arising much later in life with no presence of either hallucinations or a deteriorating course, and paraphrenia as an identical syndrome to paranoia but with hallucinations. Even at the present time, a delusion need not be suspicious or fearful to be classified as paranoid. A person might be diagnosed with paranoid schizophrenia without delusions of persecution, simply because the delusions refer mainly to the self.

==Relations to violence==
It has generally been agreed upon that individuals with paranoid delusions will have the tendency to take action based on their beliefs.<ref>Bental and Taylor (2006), p. 286</ref> More research is needed on the particular types of actions that are pursued based on paranoid delusions. Some researchers have made attempts to distinguish the different variations of actions brought on as a result of delusions. Wessely et al. (1993) did just this by studying individuals with delusions of which more than half had reportedly taken action or behaved as a result of these delusions. However, the overall actions were not of a violent nature in most of the informants. The authors note that other studies such as one by Taylor (1985), have shown that violent behaviors were more common in certain types of paranoid individuals, mainly those considered to be offensive such as prisoners.<ref>Wessely et al. (1993)</ref>

Other researchers have found associations between childhood abusive behaviors and the appearance of violent behaviors in psychotic individuals. This could be a result of their inability to cope with aggression as well as other people, especially when constantly attending to potential threats in their environment.<ref>Bentall and Taylor(2006), p. 287</ref> The attention to threat itself has been proposed as one of the major contributors of violent actions in paranoid people, although there has been much deliberation about this as well.<ref>Bentall and Taylor (2006), p. 287-288</ref> Other studies have shown that there may only be certain types of delusions that promote any violent behaviors, persecutory delusions seem to be one of these.<ref>Bjorkly (2002)</ref>

Having resentful emotions towards others and the inability to understand what other people are feeling seem to have an association with violence in paranoid individuals. This was based on a study of people with paranoid schizophrenia (one of the common mental disorders that exhibit paranoid symptoms) theories of mind capabilities in relation to empathy. The results of this study revealed specifically that although the violent patients were more successful at the higher level theory of mind tasks, they were not as able to interpret others' emotions or claims.<ref>Abu-Akel and Abushua'leh (2004)</ref>

==Paranoid social cognition==
Social psychological research has proposed a mild form of paranoid cognition, ''paranoid social cognition'', that has its origins in social determinants more than intra-psychic conflict.<ref name=Fenigstein92>Fenigstein, A., & Vanable, P. A. (1992). "Paranoia and self-consciousness." ''Journal of Personality and Social Psychology'', 62, 129 – 138.</ref><ref name=Kramer94>Kramer, R. M. (1994). "The sinister attribution error: Origins and consequences of collective paranoia." ''Motivation and Emotion'', 18, 199 – 230.</ref><ref name=Kramer95a>Kramer, R. M. (1995a). "In dubious battle: Heightened accountability, dysphoric cognition, and self-defeating bargaining behavior." In R. M. Kramer & D. M. Messick (Eds.), ''Negotiation in its social context'' (pp.&nbsp;95 – 120). Thousand Oaks, CA: Sage.</ref><ref name=Kramer95b>Kramer, R. M. (1995b). "Power, paranoia, and distrust in organizations: The distorted view from the top." ''Research on Negotiation in Organizations'', 5, 119 – 154.</ref><ref name=Zimbardo81>Zimbardo, P. G., Andersen, S. M., & Kabat, L. G. (1981). "Induced hearing deficit generates experimental paranoia." ''Science'', 212, 1529 – 1531.</ref> This perspective states that in milder forms, paranoid cognitions may be very common among normal individuals. For instance, it is not considered strange to have self-centered thoughts of being talked about, or to be suspicious of others' intentions, or to assume ill-will or hostility (e.g., a feeling of everything going against them). According to Kramer (1998), these milder forms of paranoid cognition may be considered an adaptive response to cope with or make sense of a disturbing and threatening social environment.

Paranoid cognition captures the idea that dysphoric self-consciousness may be related to the position a person occupies in a social system. This [[self-consciousness]] conduces to a hypervigilant and ruminative mode to process social information that finally will stimulate a variety of paranoid-like forms of social misperception and misjudgment.<ref name=Kramer98>Kramer, R. M. (1998). "Revisiting the Bay of Pigs and Vietnam decisions twenty-five years later: How well has the group think hypothesis stood the test of time?" ''Organizational Behavior and Human Decision Processes'', 73, 236 – 271.</ref>  This model identifies four components that are essential to understanding paranoid social cognition: situational antecedents, dysphoric self-consciousness, hypervigilance and rumination, and judgmental biases.

===Situational antecedents===
Perceived social distinctiveness, perceived evaluative scrutiny and uncertainty about the social standing.
*Perceived social distinctiveness: According to the [[social identity theory]],<ref name=Turner87>Turner, J. (1987). ''Rediscovering the social group: A self-categorization theory''. Oxford: Basil Blackwell.</ref> people categorize themselves in terms of characteristics that made them unique or different from others under certain circumstances.<ref name=Cota86>Cota, A. A., & Dion, K. L. (1986). "Salience of gender and sex composition of ad-hoc groups: An experimental test of distinctiveness theory." ''Journal of Personality and Social Psychology'', 50, 770 – 776.</ref><ref name=Turner87/> Gender, ethnicity, age, or experience may become extremely relevant to explain people's behavior when these attributes make them unique in a social group. This distinctive attribute may have influence not only in how people are perceived, but may also affect the way they perceive themselves. 
*Perceived evaluative scrutiny: According to this model, dysphoric self-consciousness may increase when people feel under moderate or intensive evaluative social scrutiny such as when an asymmetric relationship is analyzed. For example, when asked about relationships, doctoral students remembered events that they interpreted as significant to their degree of trust in their advisors when compared with their advisors. This suggests that students are willing to pay more attention to their advisor than their advisor is to them. Also, students spent more time ruminating about behaviors, events, and their relationship in general.{{Citation needed|date=June 2015}}
*Uncertainty about social standing: Knowledge about social standing is another factor that may induce paranoid social cognition. Many researchers have argued that experiencing uncertainty about a social position in a social system constitutes an adverse psychological state, one which people are highly motivated to reduce.

===Dysphoric self-consciousness===
An aversive form of heightened 'public self-consciousness' is characterized by the feelings that one is under intensive evaluation or [[scrutiny]].<ref name=Kramer95a/><ref>Sutton, R. I., & Galunic, D. C. (1996). "Consequences of public scrutiny for leaders and their organizations." In B. M. Staw & L. L. Cummings (Eds.), ''Research in organizational behavior'' (Vol. 18, pp. 201–250). Greenwich, CT: JAI.</ref> Becoming self-tormenting will increase the odds of interpreting others' behaviors in a self-referential way.

===Hypervigilance and rumination===
Self-consciousness was characterized as an aversive psychological state. According to this model, people experiencing self-consciousness will be highly motivated to reduce it, trying to make sense of what they are experiencing. These attempts promote hypervigilance and rumination in a circular relationship: more hypervigilance generates more rumination, whereupon more rumination generates more hypervigilance. Hypervigilance can be thought of as a way to appraise threatening social information, but in contrast to adaptive vigilance, hypervigilance will produce elevated levels of arousal, fear, anxiety, and threat perception.<ref>Lazarus, R. S., & Folkman, S. (1984). ''Stress, appraisal, and coping''. New York: Springer.</ref> Rumination is another possible response to threatening social information. Rumination can be related to the paranoid social cognition because it can increase negative thinking about negative events, and evoke a pessimistic explanatory style.

===Judgmental and cognitive biases===
Three main judgmental consequences have been identified:<ref name=Kramer94/>
*The sinister attribution error: This bias captures the tendency that social perceivers have to overattribute lack of trustworthiness to others.
*The overly personalistic construal of social interaction: Refers to the inclination that paranoid perceiver has to interpret others'  action in a disproportional self-referential way, increasing the belief that they are the target of others' thoughts and actions. A special kind of bias in the biased punctuation of social interaction, which entail an overperception of causal linking among independent events.
*The exaggerated perception of conspiracy: Refers to the disposition that the paranoid perceiver has to overattribute social coherence and coordination to others' actions.

Meta-analyses have confirmed that individuals with paranoia tend to jump to conclusions and are incorrigible in their judgements, even for delusion-neutral scenarios.<ref>{{Cite journal|last1=McLean|first1=Benjamin F.|last2=Mattiske|first2=Julie K.|last3=Balzan|first3=Ryan P.|date=2017-03-01|title=Association of the Jumping to Conclusions and Evidence Integration Biases With Delusions in Psychosis: A Detailed Meta-analysis|journal=Schizophrenia Bulletin|volume=43|issue=2|pages=344–354|doi=10.1093/schbul/sbw056|issn=1745-1701|pmc=5605251|pmid=27169465}}</ref><ref>{{Cite journal|last1=Dudley|first1=Robert|last2=Taylor|first2=Peter|last3=Wickham|first3=Sophie|last4=Hutton|first4=Paul|date=2016|title=Psychosis, Delusions and the "Jumping to Conclusions" Reasoning Bias: A Systematic Review and Meta-analysis|url=|journal=Schizophrenia Bulletin|volume=42|issue=3|pages=652–665|doi=10.1093/schbul/sbv150|issn=1745-1701|pmc=4838082|pmid=26519952}}</ref>

==See also==
{{Portal|Psychology|Psychiatry}}
{{col div|colwidth=20em}}
* [[Anxiety]]
* [[Apophenia]]
* [[Borderline personality disorder]]
* [[Case of Aimée]]
* [[Conspiracy theory]]
* [[Delusions of reference]]
* [[Distrust]]
* [[Fusion paranoia]]
* [[Hysteria]]
* [[Ideas of reference]]
* [[Monomania]]
* [[Narcissistic personality disorder]]
* [[Paranoid fiction]]
* [[Paranoid personality disorder]]
* [[Post-traumatic stress disorder]]
* [[Pronoia (psychology)|Pronoia]]
* [[Querulant]]
* [[Schizophrenia]]
* [[Schizotypal personality disorder]]
* ''[[Whispers: The Voices of Paranoia]]''
{{colend}}

==References==
{{Reflist}}

=== Sources ===
{{refbegin}}
* [[American Psychiatric Association]]. ''[[Diagnostic and Statistical Manual of Mental Disorders]]'' (DSM-IV-TR: Fourth edition Text Revision) (2000) [https://books.google.com/books?id=3SQrtpnHb9MC] {{Webarchive|url=https://web.archive.org/web/20221016063415/https://books.google.com/books?id=3SQrtpnHb9MC |date=2022-10-16 }}
* {{cite journal |last1 = Abu-Akel |first1 = A. |last2 = Abushua'leh |first2=K. |year = 2004 |title = 'Theory of mind' in violent and nonviolent patients with paranoid schizophrenia |journal=Schizophrenia Research |volume=69 |issue=1 |pages=45–53 |doi = 10.1016/S0920-9964(03)00049-5 |pmid = 15145470 |s2cid = 36947719 }}
* {{cite journal |last1=Barrowclough |first1=C. |last2= Tarrier |first2= N.|last3= Humphreys |first3= L. |last4= Ward |first4 = J. |last5=Gregg |first5= L. |last6=Andrews |first6= B. |year = 2003 |title = Self-Esteem in Schizophrenia: Relationships Between Self-Evaluation, Family Attitudes, and Symptomatology |journal = Journal of Abnormal Psychology |volume = 112 |issue=1 |pages=92–99 |doi=  10.1037/0021-843X.112.1.92 |pmid=12653417 }}
* {{cite journal |last1=Bentall |first1=R.P. |last2=Taylor |first2= J.L. |year = 2006 |title=Psychological Processes and Paranoia: Implications for Forensic Behavioural Science |journal = Behavioral Sciences and the Law |volume=24 |issue=3 |pages=277–294 |doi = 10.1002/bsl.718 |pmid = 16773623 |doi-access=free }}
* {{cite journal |last = Bjorkly |first = S. |year = 2002 |title = Psychotic symptoms and violence toward others — a literature review of some preliminary findings Part 1. Delusions |journal = Aggression and Violent Behavior |volume=7 |issue=6 |pages=617–631 |doi = 10.1016/s1359-1789(01)00049-0 }}
* {{cite journal |last1=Capgras |first1 = J. |last2=Reboul-Lachaux|first2=J.|date=1923|title= L'Illusion des 'sosies' dans un délire systématisé chronique |journal=History of Psychiatry |volume=5 |issue=17 |pages=119–133 |doi = 10.1177/0957154X9400501709 |s2cid = 144364931 }} <!--access-date = 2014-04-08-->
* {{cite encyclopedia |editor1-last = Deutsch |editor1-first = Albert |editor2-last = Fishman |editor2-first = Helen |volume = IV |pages= 1407–1420 |encyclopedia=The Encyclopedia of Mental Health |chapter-url = http://psycnet.apa.org.lp.hscl.ufl.edu/index.cfm?fa=search.displayRecord&uid=2007-15050-024 |year=1963 |location = New York, NY |publisher = Franklin Watts |doi = 10.1037/11547-024 |access-date= 2014-04-04 |chapter=Paranoia |title = The encyclopedia of mental health, Vol IV }}
* {{cite journal |last1=Ellis |first1=H.D.|last2=Young |first2= A.W. |year = 1990 |title = Accounting for Delusional Misidentifications |url = http://bjp.rcpsych.org.lp.hscl.ufl.edu/content/157/2/239.abstract |journal = The British Journal of Psychiatry |volume=157 |pages=239–248 |doi = 10.1192/bjp.157.2.239 |access-date = 2014-04-08 |issue=2 |pmid = 2224375 |s2cid=27270280 |url-access= subscription }}
* {{cite journal |last1=Freeman |first1= D. |last2= Garety|first2= P.A. |last3= Bebbington|first3= P.E. |last4= Smith |first4= B. |last5= Rollinson |first5= R. |last6= Fowler |first6= D. |last7= Kuipers |first7= E. |last8= Ray |first8= K. |last9= Dunn |first9= G. |year = 2005 |title = Psychological investigation of the structure of paranoia in a non-clinical population |journal=The British Journal of Psychiatry |volume=186 |pages=427–435 |doi= 10.1192/bjp.186.5.427 |issue=5 |pmid = 15863749 |doi-access= free }}
* {{cite journal |last1=Freeman |first1=Daniel | 
last2=Garety |first2=Philippa A. |last3=Fowler | first3=David | last4=Kuipers | first4=Elizabeth | last5=Bebbington | first5=Paul E. | last6=Dunn | first6=Graham | title = Why Do People With Delusions Fail to Choose More Realistic Explanations for Their Experiences? An Empirical Investigation. | journal=Journal of Consulting and Clinical Psychology | volume=72 | issue=4 | year=2004 | issn=1939-2117 | doi = 10.1037/0022-006x.72.4.671 |pmid=15301652 | pages=671–680 |citeseerx=10.1.1.468.5088 }}
* {{cite book |last=McKenna |first=P.J. |year =1997 |title=Schizophrenia and Related Syndromes |url=https://archive.org/details/schizophreniarel0000mcke |url-access=registration |page=[https://archive.org/details/schizophreniarel0000mcke/page/238 238] |location= Great Britain |publisher=Psychology Press |isbn=978-0-86377-790-5 }}
* {{cite journal |last1=Mirowski |first1=J. |last2=Ross |first2=C.E. |year = 1983 |title = Paranoia and the Structure of Powerlessness |journal=American Sociological Review |volume=48 |number=2 |pages=228–239 |jstor=2095107 |doi=10.2307/2095107 |pmid=6859680 |s2cid=10371624 }}
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* {{cite journal |last1=Wessely |first1=S.|last2=Buchanan |first2=A. |last3=Reed |first3=A. |last4=Cutting |first4=J. |last5=Everitt |first5=B. |last6=Garety |first6=P. |last7=Taylor |first7=P.J. |year = 1993 |title=Acting on Delusions. I: Prevalence |journal=The British Journal of Psychiatry |volume=163 |pages=69–76 |doi = 10.1192/bjp.163.1.69 |pmid = 8353703 |s2cid=45346403 }}
{{refend}}

==Further reading==
*American Psychiatric Association (1994). ''Diagnostic and statistical manual of mental health disorders'' (4th ed). Washington DC: Author.
* {{Cite journal |author1=Arnold, K. |author2=Vakhrusheva, J. |name-list-style=amp |title=Resist the negation reflex: Minimizing reactance in psychotherapy of delusions |journal=Psychosis |volume=8 |issue=2 |year=2015 |doi=10.1080/17522439.2015.1095229 |url=https://www.academia.edu/18748834 |format=PDF |pages=1–10 |s2cid=146386637 }}{{Dead link|date=August 2023 |bot=InternetArchiveBot |fix-attempted=yes }}
* Canneti, Elias (1962). ''Crowds and Power.'' Translated from the German by Carol Stewart. Gollancz, London. 1962.
*Colby, K. (1981). Modeling a paranoid mind. ''The Behavioral and Brain Sciences, 4'', 515 – 560.
*Deutsch, M. (1958). Trust and suspicion. ''Journal of Conflict Resolution, 2'', 265 – 279.
*{{cite encyclopedia|editor-last1=Deutsch |editor-first1=Albert|editor-last2=Fishman|editor-first2= Helen|volume=IV|pages=1407–1420|encyclopedia=The Encyclopedia of Mental Health|chapter-url=http://psycnet.apa.org.lp.hscl.ufl.edu/index.cfm?fa=search.displayRecord&uid=2007-15050-024|year=1963|publisher=New York, NY, US: Franklin Watts|doi=10.1037/11547-024|access-date=April 4, 2014|chapter=Paranoia|title=The encyclopedia of mental health, Vol IV|last1=Messinger |first1=Emanuel }}
* Farrell, John (2006). ''Paranoia and Modernity: Cervantes to Rousseau''. Cornell University Press.
* [[Daniel Freeman (psychologist)|Freeman, D.]] & Garety, P. A. (2004). ''Paranoia: The Psychology of Persecutory Delusions''. Hove: Psychology Press. {{ISBN|1-84169-522-X}}
* Igmade (Stephan Trüby et al., eds.), ''5 Codes: Architecture, Paranoia and Risk in Times of Terror'', Birkhäuser 2006. {{ISBN|3-7643-7598-1}}
* Kantor, Martin (2004). ''Understanding Paranoia: A Guide for Professionals, Families, and Sufferers''. Westport: Praeger Press. {{ISBN|0-275-98152-5}}
* Munro, A. (1999). ''Delusional disorder''. Cambridge: Cambridge University Press. {{ISBN|0-521-58180-X}}
*{{cite journal |last=Mura |first=Andrea |year=2016 |title=National Finitude and the Paranoid Style of the One |journal=Contemporary Political Theory |volume=15 |pages=58–79 |doi= 10.1057/cpt.2015.23|s2cid=53724373 |url=http://research.gold.ac.uk/19373/1/Mura%20-%20National%20Finitude%20and%20the%20Paranoid%20Style%20of%20the%20One.pdf }}
* Robins, R., & Post, J. (1997). ''Political paranoia: The politics of hatred''. New Haven, CT: Yale University Press.
* Sant, P. (2005). ''Delusional disorder''. Punjab: Panjab University Chandigarh. {{ISBN|0-521-58180-X}}
* Sims, A. (2002). ''Symptoms in the mind: An introduction to descriptive psychopathology (3rd edition)''. Edinburgh: [[Elsevier]] Science Ltd. {{ISBN|0-7020-2627-1}}
*{{cite book|last=Siegel|first=Ronald K.|title=Whispers: The Voices of Paranoia|year=1994|publisher=Crown|location=New York|isbn=978-0-684-80285-5|author-link=Ronald K. Siegel|title-link=Whispers: The Voices of Paranoia}}

==External links==
*{{wiktionary-inline}}
*{{commons category-inline}}
*{{wikiquote-inline}}
{{Medical resources
| ICD11  = {{ICD11|MB25}}–{{ICD11|MB26}} (thought symptoms), {{ICD11|6A20}} ([[schizophrenia]]) + {{ICD11|6A25.0}} ([[positive symptoms]]), {{ICD11|6A24}} ([[delusional disorder]])
| ICD10  = {{ICD10|F20.0}} ([[paranoid schizophrenia]]), {{ICD10|F22}} (persistent delusional disorders), {{ICD10|F60.0}} ([[paranoid personality disorder]])
| ICD9   = {{ICD9|295.3}} (paranoid type schizophrenia), {{ICD9|297.1}} (delusional disorder), {{ICD9|297.2}} ([[paraphrenia]])
| MeshID = D010259
}}

{{Mental and behavioral disorders|selected = schizophrenia}}
{{Conspiracy theories}}

{{Authority control}}

[[Category:Paranoia| ]]
[[Category:Psychosis]]
[[Category:Metaphors]]