Déjà vu: what causes it, the “premonition” feeling and when to see a doctor

Déjà vu, French for “already seen”, is something most people experience at least once in their lives (Hadzic & Andersson, 2024). You may be somewhere for the first time, or in a conversation you have never had before, and suddenly feel that it has all happened before. The classic definition is “any subjectively inappropriate impression of familiarity of the present experience with an undefined past” (Neppe, 1983, as cited in Hadzic & Andersson, 2024).

What defines it is that two feelings come together: the moment feels familiar, and you know that this familiarity is out of place (O’Connor & Moulin, 2010). Researchers therefore also define déjà vu as a clash between a sense of familiarity and a sense of novelty (Aitken et al., 2023). It usually resolves with the awareness that the familiarity does not fit (O’Connor & Moulin, 2010), and it usually passes within a few seconds (Mumoli et al., 2017).

The opposite, when something you know well suddenly feels unfamiliar, is called jamais vu (Moulin et al., 2021). Some researchers also set apart déjà vécu, the sense of having already lived through the moment: déjà vu is explained as false familiarity, déjà vécu as false recollection (Illman et al., 2012). In Korean the experience is called gisigam, and in Japanese kishikan (National Institute of Korean Language, n.d.; Shogakukan, n.d.).

Déjà vu is not a diagnosis: the World Health Organization’s International Classification of Diseases (ICD-11) has no entry for it (Hadzic & Andersson, 2024). The International League Against Epilepsy’s 2025 seizure classification, however, lists déjà vu and jamais vu among the features that can appear during a seizure (Beniczky et al., 2025). mind.io has no déjà vu test, and this guide is not a diagnosis. It sets out, from research and official sources, how common déjà vu is, what may cause it, who has it more often, where the feeling of knowing what comes next comes from, and the signs that go with seizure-related déjà vu and call for a doctor.

A meta-analysis that pooled several surveys found that about 74% of healthy people reported having had déjà vu, but the 10 surveys behind that figure differed a great deal (Hadzic & Andersson, 2024), so no single exact rate can be given. A classic review put it at about 60% (Brown, 2003); 76.2% of 386 adults in Japan (Adachi et al., 2003), 73% of 542 adults in Italy (Mumoli et al., 2017) and 88.8% of 365 adults in an online survey in the Czech Republic (Lacinová et al., 2016) said they had had it. In a large online survey in Brazil, déjà vu was the most commonly reported of the unusual experiences asked about (Fischer et al., 2026).

One reason the figures differ is how the question is asked. After a memory task that was not expected to cause déjà vu, 32% to 58% of participants who were shown present-day definitions still reported déjà vu or a tip-of-the-tongue state, and a different way of asking reduced the number of reports (Jersakova et al., 2016). In the Brazilian survey, too, framing the questions as a mental health survey or allowing only yes/no answers produced lower rates for these unusual experiences (Fischer et al., 2026).

Having it often is uncommon. In the Italian survey, “a few times a year” was the most common answer among all 542 people, at 42.8%; “a few times a month” was 6.8%, “at least weekly” 0.9%, and 25.3% had never had it. Of those who had, 66.1% said it lasted a few seconds and 19.5% from one to a couple of minutes (Mumoli et al., 2017).

It usually feels neutral or pleasant. In the Italian survey, 45.1% of those who had déjà vu said it left them indifferent, 29.9% that it was nice and pleasant, and 13.2% that it frightened them (several answers allowed; Mumoli et al., 2017). If strong fear comes with it, see “When it can be a seizure sign” below.

The exact cause is not yet known. A classic review sorted scientific explanations into four groups: dual processing (two mental processes briefly out of step), neurological (a seizure or a disruption in nerve signalling), memory (familiarity from something not consciously recognised) and attention (something seen without attention, then seen again with attention) (Brown, 2003). Déjà vu is now beginning to be understood scientifically as a memory phenomenon (Cleary & Claxton, 2018).

Experiments have tested the memory explanation. The idea is that when a new scene resembles one you saw before but that earlier scene does not come to mind, only the familiarity is left, and it can become déjà vu. In experiments, resemblance to a previously viewed scene increased both feelings of familiarity and reports of déjà vu (Cleary et al., 2009). A virtual reality study used scenes with different contents but a similar layout, such as a bowling alley and a subway station (Barnett, 2025); when people could not recall the earlier scene, familiarity and déjà vu reports were higher than for completely new scenes (Cleary et al., 2012). In a Japanese study too, people more sensitive to resemblance tended to have déjà vu more often in daily life (Sugimori & Kusumi, 2014).

Experiments also support the attention explanation: after a very brief glance at a symbol, people were more likely to think they had seen it before the experiment (Brown & Marsh, 2009). This did not measure déjà vu itself, but it suggests that something glimpsed and then properly looked at straight away can feel “seen before”. There is also a neurological explanation. In 24 people with epilepsy who had electrodes placed in the brain for tests before surgery, electrical stimulation of the inner part of the temporal lobe, especially the entorhinal cortex, sometimes produced déjà vu (Bartolomei et al., 2004), and the same group described it as brief cooperation between several structures in the inner temporal lobe (Bartolomei et al., 2012). These findings come from people with epilepsy.

A more recent hypothesis is that déjà vu is the brain noticing a conflict in memory. In an experiment that created false familiarity with words, déjà vu reports reached about 25% when it was clear the word was new, against about 10% when it was less clear (Urquhart & O’Connor, 2014). A brain imaging study of 21 healthy people, 16 of whom reported déjà vu, found areas linked to memory conflict, including the anterior cingulate cortex, medial prefrontal cortex and parietal cortex; the researchers suggested that resolving memory conflict may play a central part in déjà vu (Urquhart et al., 2021). Others propose that this account may also explain why déjà vu becomes less frequent with age (Aitken et al., 2023).

No hypothesis has been confirmed. Most studies rely on people’s own reports (Hadzic & Andersson, 2024), and a 2010 review noted that the techniques used to study déjà vu were at an early stage and urged cautious reading of the findings (O’Connor & Moulin, 2010). Studies comparing brain structure in people who have déjà vu have also given inconsistent results (Hadzic & Andersson, 2024). The idea that it happens because visual signals from the eyes arrive late was challenged by the case of a blind man with normal déjà vu (O’Connor & Moulin, 2006).

The most consistent finding is age. Déjà vu becomes less frequent with age (Brown, 2003); across studies it went down as age went up and was not linked to sex (Hadzic & Andersson, 2024). In Japan, people who had had déjà vu were younger and more educated than those who had not, with no differences by sex, handedness or area of residence (Adachi et al., 2003). A classic review also reports more déjà vu with higher socioeconomic level and education (Brown, 2003).

In some studies, people who travel more report more déjà vu. Among 206 university students in the UK, travel frequency and déjà vu showed a weak positive correlation (r = 0.216) (O’Connor & Moulin, 2013), and in a 1951 survey 11% of people who did not travel and 32% of those who travelled up to five times a year had had déjà vu (Chapman & Mensh, 1951, as cited in O’Connor & Moulin, 2013). In the Japanese survey, however, déjà vu grouped with remembering dreams and “precognitive” dreams rather than with travel or paranormal items, which the researchers read as a link with good memory function (Adachi et al., 2003). In the UK study, by contrast, how much déjà vu people had was not related to memory measured with a word recognition test (O’Connor & Moulin, 2013).

Findings on stress and tiredness are mixed. A classic review says déjà vu appears to be associated with stress and fatigue (Brown, 2003), but in the Czech survey, neuroticism, depression and perceived stress did not predict déjà vu (Lacinová et al., 2016). In the Italian survey, the most common state just before déjà vu was “relaxed”, at 49.9%, followed by “mentally fatigued” 13.9%, “nervous or under stress” 13.2%, “physically fatigued” 12.9% and “drowsy” 10.4% (several answers allowed; Mumoli et al., 2017). We found no study showing that lack of sleep increases déjà vu.

The same goes for anxiety. In an online survey, people who reported a clinical diagnosis of anxiety had more déjà vu over the previous month than age-matched controls, had it more often and more intensely when their anxiety was high, and found it more distressing (Wells et al., 2021). On the other hand, a UK study comparing people with epilepsy, neurology patients and medical students found that, once the group was taken into account, anxiety and depression scores were not linked to how often people had déjà vu (Warren-Gash & Zeman, 2014). Frequent déjà vu does not mean you have an anxiety disorder.

Déjà vu can come with a feeling that you know what is about to happen. In the Italian survey, 16.5% of those who had déjà vu said that during it they felt they could predict what would happen in the next few minutes (Mumoli et al., 2017). In a laboratory task, just over half of reported déjà vu states came with such a feeling of prediction, and those that did were accompanied by stronger familiarity (Cleary et al., 2021a).

One study tested whether the feeling is right. People moved along paths in a virtual environment, and paths that resembled an earlier, unrecalled path increased reports of déjà vu. During déjà vu, people felt more strongly that they knew which way the next turn would go, but they did not predict it better than chance (Cleary & Claxton, 2018). The researchers suggested that a bias in judgement brought on by the déjà vu state itself may explain the feeling. After seeing the turn, people were also more inclined to feel that things had gone as expected when they had reported déjà vu (Cleary et al., 2019).

Another experiment suggests that familiarity itself feeds the feeling. Without ever asking about déjà vu, researchers made the layout of scenes more familiar; when people could not recall the similar scene they had studied, the feeling of knowing what comes next rose as familiarity rose (Huebert et al., 2025). Familiarity from a memory that does not come to mind can turn into a feeling of “knowing”.

Some people interpret déjà vu as a memory from a past life or a paranormal ability. In the Italian survey, the explanations chosen (several allowed) were “unconscious memories” 65.3%, “anxiety or tension” 21.5%, “poor memory” 21.3%, “reincarnation” 5.8% and “paranormal qualities” 5.1% (Mumoli et al., 2017). Among 422 healthy adults in Taiwan, more déjà vu went with stronger paranormal belief (Shiah et al., 2014). Beliefs are personal, but what experiments have shown is that the feeling of prediction during déjà vu did not turn into actual prediction. Why dreams that “came true” stay in memory is covered in Do dreams mean anything?, and why a plausible description feels personal in the Barnum effect.

It is widely recognised that very frequent déjà vu can point to seizures, most often focal seizures starting in the inner (medial) temporal lobe (Cleary et al., 2021b). Seoul National University Hospital calls the unusual sensations or feelings that come before a temporal lobe seizure an aura, and gives typical examples: sudden fear or intense happiness, déjà vu, a sudden strange smell or taste, and a feeling of something rising from the stomach (Seoul National University Hospital, n.d.). A UK epilepsy charity explains that an aura is itself a type of focal seizure that begins in one part of the brain (Epilepsy Action, 2025).

The déjà vu itself feels much the same whether it is part of a seizure or not, so it is told apart by the company it keeps (Warren-Gash & Zeman, 2014). In a UK study, déjà vu in people with epilepsy was more frequent and lasted somewhat longer, and more often came with derealisation, smell or taste hallucinations, physical symptoms such as headaches or stomach sensations, and fear (Warren-Gash & Zeman, 2014). Unlike a fleeting ordinary déjà vu, seizure-related déjà vu can last a minute or two (Barnett, 2025).

A temporal lobe seizure usually lasts 30 seconds to 2 minutes, and may involve not being aware of the surroundings, staring at one spot, lip smacking or tongue clicking, repeated chewing and swallowing, or scratching and picking with the fingers. Afterwards, the person may be confused and have trouble speaking for a while (Seoul National University Hospital, n.d.).

This does not mean that déjà vu is a sign of epilepsy. It is common, reported by about 74% of healthy people, and in the same meta-analysis about 22% of people with epilepsy had déjà vu during seizures (Hadzic & Andersson, 2024). Among 312 people with epilepsy in Japan, too, more had ordinary déjà vu they did not recognise as a seizure (55.6%) than déjà vu they recognised as part of a seizure (24.0%) (Adachi et al., 2010). No seizure-like brain activity was recorded during déjà vu in healthy people, and déjà vu during seizures came with the most negative feelings, especially fear (Hadzic & Andersson, 2024).

It also helps to tell déjà vu apart from experiences that can look similar. A US neurologist reports that some patients said they had had the feeling for years and thought it was a panic attack (Barnett, 2025). Déjà vu and derealisation can occur together (Hadzic & Andersson, 2024), but in a survey of 227 adults in Japan, déjà vu was not associated with pathological dissociation (Adachi et al., 2008). If familiar things keep feeling strange and dreamlike, or you feel detached from yourself, it may be depersonalisation or derealisation. Rarely, a case has been reported of one man who had intense, repeated déjà vu within a day of starting two medicines together for flu, which stopped when he stopped the medicines (Taiminen & Jääskeläinen, 2001).

Occasional déjà vu that lasts a few seconds is usually harmless. The American Academy of Neurology’s patient magazine says about two-thirds of people have experienced déjà vu and that in the vast majority of cases it is eerie yet harmless (Barnett, 2025). The researchers of the Brazilian survey also saw their finding that déjà vu was the most common experience as fitting earlier work suggesting that familiarity-based errors may be frequent and relatively harmless (Fischer et al., 2026). We found no tested way to prevent or stop ordinary déjà vu.

See a doctor, ideally a neurologist, if déjà vu is unusually frequent or lasts a minute or two; if it comes with a strange smell or taste, a rising feeling in the stomach or sudden fear; if others tell you that you stared without responding or smacked your lips afterwards; or if you are confused or find it hard to speak afterwards (Warren-Gash & Zeman, 2014; Barnett, 2025; Seoul National University Hospital, n.d.; Epilepsy Action, 2025). A US neurologist says any combination of these experiences should be checked by a neurologist (Barnett, 2025). Seoul National University Hospital lists neurology and neurosurgery as the departments for temporal lobe epilepsy (Seoul National University Hospital, n.d.). Your family doctor is a good first contact.

Doctors judge whether it is a seizure from the symptoms and what eyewitnesses saw (Adamolekun, 2026). Because people often do not remember their own seizures, an account from family or friends who saw it helps a great deal, and you may be offered an EEG to check the brain’s electrical activity and a brain scan such as an MRI (Seoul National University Hospital, n.d.; NHS, 2025). Because the recording time is limited, an EEG can be normal even in someone with a seizure disorder (Adamolekun, 2026). Writing down when it happened, how long it lasted and what came with it makes it easier to explain. Mention any medicine you have recently started, and do not stop a prescribed medicine on your own; talk to the doctor who prescribed it. About 60% to 70% of people with temporal lobe epilepsy have their symptoms well controlled with medicine (Seoul National University Hospital, n.d.).

If anxiety or a sense of unreality bothers you more than the déjà vu, look at that instead. The anxiety check-in (GAD-7) looks at your anxiety over the past 2 weeks, not at déjà vu. If you or your surroundings often feel strange, see the depersonalisation and derealisation guide, and if it would be your first visit to a psychiatrist, see Seeing a psychiatrist for the first time. In the case of a young man with anxiety and depersonalisation whose déjà vu was persistent and debilitating, the EEG and MRI were normal (Wells et al., 2014).

Q. Why does déjà vu happen? A. The exact cause is not yet known. Experiments support the hypothesis that familiarity is left over when a scene resembles an earlier one that does not come to mind (Cleary et al., 2012), and another hypothesis holds that it is the brain noticing and resolving a conflict in memory (Urquhart et al., 2021).

Q. Is frequent déjà vu a sign of illness? A. Déjà vu alone does not mean you are ill. Having it every week is rare, at 0.9% (Mumoli et al., 2017), and seizure-related déjà vu is more frequent and comes with other symptoms (Warren-Gash & Zeman, 2014). If it comes with a strange smell or taste, a rising feeling in the stomach, fear or blank spells, see a doctor (Seoul National University Hospital, n.d.).

Q. Is déjà vu a premonition or a sign of psychic ability? A. Not in experiments. The feeling of knowing what comes next grew stronger during déjà vu, but people did not predict better than chance (Cleary & Claxton, 2018), and when a similar scene did not come to mind, simply making things more familiar strengthened that feeling (Huebert et al., 2025).

Q. How is jamais vu different from déjà vu? A. It goes the other way: in déjà vu something new feels familiar, in jamais vu something familiar feels new (Moulin et al., 2021). When people repeatedly copied the same word, about two-thirds reported a strange feeling, usually after about thirty repetitions, or one minute, and in daily life people who had déjà vu more often also had jamais vu more often (Moulin et al., 2021). The team won the 2023 Ig Nobel Prize for literature (Improbable Research, 2023).

Q. Does it fade with age? A. Yes. Many surveys show that déjà vu becomes less frequent with age (Brown, 2003; Hadzic & Andersson, 2024), and it has been described as most frequent in young adulthood (Aitken et al., 2023).

Q. Is it caused by stress or tiredness? A. It is not clear. A classic review links it with stress and fatigue (Brown, 2003), but stress did not predict déjà vu in another survey (Lacinová et al., 2016), and in the Italian survey “relaxed” was the most common state just before it (Mumoli et al., 2017).

Q. Is it a sign of dementia or mental illness? A. Not ordinary déjà vu. In Japan, people with schizophrenia reported déjà vu less often (53.1%) than a comparison group (76.2%) (Adachi et al., 2006). Rare cases have been reported of two people with dementia who kept feeling that they had already lived through the present moment (Moulin et al., 2005), but in ordinary déjà vu you know the feeling is false, while the cases reported in dementia lack that awareness (O’Connor & Moulin, 2010; Wells et al., 2014).

Q. Does “déjà vu” mean the same thing in French? A. Not always. In French the phrase can also describe genuinely having seen something before (Fortier & Moulin, 2015). French and English speakers had déjà vu at equal rates in one study, but French speakers described it as more frequent and, unexpectedly, more troubling (Fortier & Moulin, 2015).

References: Hadzic, A., & Andersson, S. (2024), Non-ictal, interictal and ictal déjà vu: A systematic review and meta-analysis, Frontiers in Neurology 15, 1406889, https://doi.org/10.3389/fneur.2024.1406889; Neppe, V. M. (1983), The concept of déjà vu, Parapsychological Journal of South Africa 4, 1-10 (cited in Hadzic & Andersson, 2024); O’Connor, A. R., & Moulin, C. J. A. (2010), Recognition without identification, erroneous familiarity, and déjà vu, Current Psychiatry Reports 12(3), 165-173, https://doi.org/10.1007/s11920-010-0119-5; Aitken, C. B. A., Jentzsch, I., & O’Connor, A. R. (2023), Towards a conflict account of déjà vu: The role of memory errors and memory expectation conflict in the experience of déjà vu, Neuroscience & Biobehavioral Reviews 155, 105467, https://doi.org/10.1016/j.neubiorev.2023.105467; Mumoli, L., Tripepi, G., Aguglia, U., Augimeri, A., Baggetta, R., Bisulli, F., et al. (2017), Validation study of Italian version of Inventory for Déjà Vu Experiences Assessment (I-IDEA): A screening tool to detect déjà vu phenomenon in Italian healthy individuals, Behavioral Sciences 7(3), 50, https://doi.org/10.3390/bs7030050; National Institute of Korean Language (n.d.), Standard Korean Language Dictionary: gisigam, misigam; Urimalsaem: dejabwi, dejabyu [in Korean], https://stdict.korean.go.kr/ and https://opendict.korean.go.kr/; Moulin, C. J. A., Bell, N., Turunen, M., Baharin, A., & O’Connor, A. R. (2021), The the the the induction of jamais vu in the laboratory: Word alienation and semantic satiation, Memory 29(7), 933-942, https://doi.org/10.1080/09658211.2020.1727519; Illman, N. A., Butler, C. R., Souchay, C., & Moulin, C. J. A. (2012), Déjà experiences in temporal lobe epilepsy, Epilepsy Research and Treatment 2012, 539567, https://doi.org/10.1155/2012/539567; Beniczky, S., Trinka, E., Wirrell, E., Abdulla, F., Al Baradie, R., Alonso Vanegas, M., et al. (2025), Updated classification of epileptic seizures: Position paper of the International League Against Epilepsy, Epilepsia 66(6), 1804-1823, https://doi.org/10.1111/epi.18338; Brown, A. S. (2003), A review of the déjà vu experience, Psychological Bulletin 129(3), 394-413, https://doi.org/10.1037/0033-2909.129.3.394; Adachi, N., Adachi, T., Kimura, M., Akanuma, N., Takekawa, Y., & Kato, M. (2003), Demographic and psychological features of déjà vu experiences in a nonclinical Japanese population, Journal of Nervous and Mental Disease 191(4), 242-247, https://doi.org/10.1097/01.NMD.0000061149.26296.DC; Lacinová, L., Neužilová Michalčáková, R., Širůček, J., Ježek, S., Chromec, J., Masopustová, Z., Urbánek, T., & Brázdil, M. (2016), Déjà vu experiences in healthy Czech adults, Journal of Nervous and Mental Disease 204(12), 925-930, https://doi.org/10.1097/NMD.0000000000000573; Fischer, R., Bortolini, G., Bortolini, T., Maraldi, E. O., Hartle, L., de Lima Varejão, M. V., Laport, M. C., Oliveira, M. E., Ihm, E., Taves, A., & Moll, J. (2026), Prevalence estimates of nonordinary experiences depend on validity and measurement choices, Communications Psychology 4(1), 106, https://doi.org/10.1038/s44271-026-00464-1; Jersakova, R., Moulin, C. J. A., & O’Connor, A. R. (2016), Investigating the role of assessment method on reports of déjà vu and tip-of-the-tongue states during standard recognition tests, PLoS ONE 11(4), e0154334, https://doi.org/10.1371/journal.pone.0154334; Cleary, A. M., & Claxton, A. B. (2018), Déjà vu: An illusion of prediction, Psychological Science 29(4), 635-644, https://doi.org/10.1177/0956797617743018; Cleary, A. M., Ryals, A. J., & Nomi, J. S. (2009), Can déjà vu result from similarity to a prior experience? Support for the similarity hypothesis of déjà vu, Psychonomic Bulletin & Review 16(6), 1082-1088, https://doi.org/10.3758/PBR.16.6.1082; Barnett, B. (2025), Understanding déjà vu: Causes, effects, and its link to epilepsy, Brain & Life, https://www.brainandlife.org/articles/deja-vu-cause-effects-epilepsy; Cleary, A. M., Brown, A. S., Sawyer, B. D., Nomi, J. S., Ajoku, A. C., & Ryals, A. J. (2012), Familiarity from the configuration of objects in 3-dimensional space and its relation to déjà vu: A virtual reality investigation, Consciousness and Cognition 21(2), 969-975, https://doi.org/10.1016/j.concog.2011.12.010; Sugimori, E., & Kusumi, T. (2014), The similarity hypothesis of déjà vu: On the relationship between frequency of real-life déjà vu experiences and sensitivity to configural resemblance, Journal of Cognitive Psychology 26(1), 48-57, https://doi.org/10.1080/20445911.2013.854248; Brown, A. S., & Marsh, E. J. (2009), Creating illusions of past encounter through brief exposure, Psychological Science 20(5), 534-538, https://doi.org/10.1111/j.1467-9280.2009.02337.x; Bartolomei, F., Barbeau, E., Gavaret, M., Guye, M., McGonigal, A., Régis, J., & Chauvel, P. (2004), Cortical stimulation study of the role of rhinal cortex in déjà vu and reminiscence of memories, Neurology 63(5), 858-864, https://doi.org/10.1212/01.wnl.0000137037.56916.3f; Bartolomei, F., Barbeau, E. J., Nguyen, T., McGonigal, A., Régis, J., Chauvel, P., & Wendling, F. (2012), Rhinal-hippocampal interactions during déjà vu, Clinical Neurophysiology 123(3), 489-495, https://doi.org/10.1016/j.clinph.2011.08.012; Urquhart, J. A., & O’Connor, A. R. (2014), The awareness of novelty for strangely familiar words: A laboratory analogue of the déjà vu experience, PeerJ 2, e666, https://doi.org/10.7717/peerj.666; Urquhart, J. A., Sivakumaran, M. H., Macfarlane, J. A., & O’Connor, A. R. (2021), fMRI evidence supporting the role of memory conflict in the déjà vu experience, Memory 29(7), 921-932, https://doi.org/10.1080/09658211.2018.1524496; O’Connor, A. R., & Moulin, C. J. A. (2006), Normal patterns of déjà experience in a healthy, blind male: Challenging optical pathway delay theory, Brain and Cognition 62(3), 246-249, https://doi.org/10.1016/j.bandc.2006.06.004; O’Connor, A. R., & Moulin, C. J. A. (2013), Déjà vu experiences in healthy subjects are unrelated to laboratory tests of recollection and familiarity for word stimuli, Frontiers in Psychology 4, 881, https://doi.org/10.3389/fpsyg.2013.00881; Chapman, A. H., & Mensh, I. N. (1951), Déjà vu experience and conscious fantasy in adults, Psychiatric Quarterly Supplement 25, 163-175 (cited in O’Connor & Moulin, 2013); Wells, C. E., O’Connor, A. R., & Moulin, C. J. A. (2021), Déjà vu experiences in anxiety, Memory 29(7), 895-903, https://doi.org/10.1080/09658211.2018.1538418; Warren-Gash, C., & Zeman, A. (2014), Is there anything distinctive about epileptic deja vu?, Journal of Neurology, Neurosurgery & Psychiatry 85(2), 143-147, https://doi.org/10.1136/jnnp-2012-303520; Cleary, A. M., McNeely-White, K. L., Huebert, A. M., & Claxton, A. B. (2021a), Déjà vu and the feeling of prediction: An association with familiarity strength, Memory 29(7), 904-920, https://doi.org/10.1080/09658211.2018.1503686; Cleary, A. M., Huebert, A. M., McNeely-White, K. L., & Spahr, K. S. (2019), A postdictive bias associated with déjà vu, Psychonomic Bulletin & Review 26(4), 1433-1439, https://doi.org/10.3758/s13423-019-01578-w; Huebert, A. M., Myers, S. J., & Cleary, A. M. (2025), Experimental evidence that illusory feelings of prediction can be caused by familiarity detection, Consciousness and Cognition 133, 103904, https://doi.org/10.1016/j.concog.2025.103904; Shiah, Y.-J., Wu, Y.-Z., Chen, Y.-H., & Chiang, S.-K. (2014), Schizophrenia and the paranormal: More psi belief and superstition, and less déjà vu in medicated schizophrenic patients, Comprehensive Psychiatry 55(3), 688-692, https://doi.org/10.1016/j.comppsych.2013.11.003; Cleary, A. M., Neisser, J., McMahan, T., Parsons, T. D., Alwaki, A., Okada, N., et al. (2021b), Subjective distinguishability of seizure and non-seizure déjà vu: A case report, brief literature review, and research prospects, Epilepsy & Behavior 125, 108373, https://doi.org/10.1016/j.yebeh.2021.108373; Seoul National University Hospital (n.d.), Temporal lobe epilepsy, N medical information [in Korean], https://www.snuh.org/health/nMedInfo/nView.do?category=DIS&medid=AA001119; Epilepsy Action (2025), Focal seizures, https://www.epilepsy.org.uk/info/seizures/focal-seizures; Adachi, N., Akanuma, N., Ito, M., Adachi, T., Takekawa, Y., Adachi, Y., Matsuura, M., Kanemoto, K., & Kato, M. (2010), Two forms of déjà vu experiences in patients with epilepsy, Epilepsy & Behavior 18(3), 218-222, https://doi.org/10.1016/j.yebeh.2010.02.016; Adachi, N., Akanuma, N., Adachi, T., Takekawa, Y., Adachi, Y., Ito, M., & Ikeda, H. (2008), Déjà vu experiences are rarely associated with pathological dissociation, Journal of Nervous and Mental Disease 196(5), 417-419, https://doi.org/10.1097/NMD.0b013e31816ff36d; Taiminen, T., & Jääskeläinen, S. K. (2001), Intense and recurrent déjà vu experiences related to amantadine and phenylpropanolamine in a healthy male, Journal of Clinical Neuroscience 8(5), 460-462, https://doi.org/10.1054/jocn.2000.0810; Adamolekun, B. (2026), Seizure disorders, MSD Manual Consumer Version, https://www.msdmanuals.com/home/brain-spinal-cord-and-nerve-disorders/seizure-disorders/seizure-disorders; NHS (2025), Epilepsy, https://www.nhs.uk/conditions/epilepsy/; Wells, C. E., Moulin, C. J. A., Ethridge, P., Illman, N. A., Davies, E., & Zeman, A. (2014), Persistent psychogenic déjà vu: A case report, Journal of Medical Case Reports 8, 414, https://doi.org/10.1186/1752-1947-8-414; Improbable Research (2023), The 2023 Ig Nobel Prize winners, https://improbable.com/ig/winners/; Adachi, T., Adachi, N., Takekawa, Y., Akanuma, N., Ito, M., Matsubara, R., Ikeda, H., Kimura, M., & Arai, H. (2006), Déjà vu experiences in patients with schizophrenia, Comprehensive Psychiatry 47(5), 389-393, https://doi.org/10.1016/j.comppsych.2005.12.003; Moulin, C. J. A., Conway, M. A., Thompson, R. G., James, N., & Jones, R. W. (2005), Disordered memory awareness: Recollective confabulation in two cases of persistent déjà vecu, Neuropsychologia 43(9), 1362-1378, https://doi.org/10.1016/j.neuropsychologia.2004.12.008; Shogakukan (n.d.), Kishikan; Dejabyu; Mishikan, Digital Daijisen and Seisenban Nihon Kokugo Daijiten via Kotobank [in Japanese], https://kotobank.jp/word/%E6%97%A2%E8%A6%96%E6%84%9F; Office québécois de la langue française (n.d.), Déjà-vu, jamais-vu ou déjà vu, jamais vu : trait d’union, Banque de dépannage linguistique [in French], https://vitrinelinguistique.oqlf.gouv.qc.ca/24555/lorthographe/emploi-du-trait-dunion/cas-particuliers-demploi-du-trait-dunion/trait-dunion-dans-deja-vu-et-jamais-vu; Fortier, J., & Moulin, C. J. A. (2015), What is French for déjà vu? Descriptions of déjà vu in native French and English speakers, Consciousness and Cognition 36, 12-18, https://doi.org/10.1016/j.concog.2015.05.013