The DOI matches its Crossref record; 41 of the 41 references it cites were found in a registry or an index.
Political Extremism Predicts Belief in Conspiracy Theories
Abstract
Historical records suggest that the political extremes—at both the “left” and the “right”—substantially endorsed conspiracy beliefs about other-minded groups. The present contribution empirically tests whether extreme political ideologies, at either side of the political spectrum, are positively associated with an increased tendency to believe in conspiracy theories. Four studies conducted in the United States and the Netherlands revealed a quadratic relationship between strength of political ideology and conspiracy beliefs about various political issues. Moreover, participants’ belief in simple political solutions to societal problems mediated conspiracy beliefs among both left- and right-wing extremists. Finally, the effects described here were not attributable to general attitude extremity. Our conclusion is that political extremism and conspiracy beliefs are strongly associated due to a highly structured thinking style that is aimed at making sense of societal events.
Overview
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
Citations
Cites
Hayes, A. F., & Preacher, K. J. (2010) · Multivariate Behavioral Research · doi:10.1080/00273171.2010.498290 · Cited by 1,160
Lacking control increases illusory pattern perception
Whitson, J. A., & Galinsky, A. D. (2008) · Science · doi:10.1126/science.1159845 · Cited by 1,119
Goertzel, T. (1994) · Political Psychology · doi:10.2307/3791630 · Cited by 1,094 · cited 2×
“…and facilitates other conspiratorial ideas, rendering belief in one conspiracy theory an excellent predictor of belief in other conspiracy theories (Goertzel, 1994; Lewandowski, Oberauer, & Gignac, 2013; Swami, Chamorro-Premuzic, & Furnham, 2010; Swami et al., 2011, 2013; Wood, Douglas, & Sutton,…”
BackgroundConspiracy theories: Causes and cures
Sunstein, C. R., & Vermeule, A. (2009) · Journal of Political Philosophy · doi:10.1111/j.1467-9760.2008.00325.x · Cited by 1,050 · cited 1×
“Various authors noted that the crippled epistemology that characterizes political extremism is also inherent to conspiracy beliefs (Sunstein & Vermeule, 2009; Swami et al., 2013).”
BackgroundDead and Alive: Beliefs in Contradictory Conspiracy Theories
Wood, M. J., Douglas, K. M., & Sutton, R. M. (2012) · Social Psychological and Personality Science · doi:10.1177/1948550611434786 · Cited by 660
Paranoia and self-consciousness.
Fenigstein, A., & Vanable, P. (1992) · Journal of Personality and Social Psychology · doi:10.1037/0022-3514.62.1.129 · Cited by 643
Lewandowsky, S., Oberauer, K., & Gignac, G. E. (2013) · Psychological Science · doi:10.1177/0956797612457686 · Cited by 638
Groups as epistemic providers: Need for closure and the unfolding of group-centrism.
Kruglanski, A. W., Pierro, A., Mannetti, L., & Grada, E. D. (2006) · Psychological Review · doi:10.1037/0033-295x.113.1.84 · Cited by 555
Swami, V., Coles, R., Stieger, S., Pietschnig, J., Furnham, A., Rehim, S., & Voracek, M. (2011) · British Journal of Psychology · doi:10.1111/j.2044-8295.2010.02004.x · Cited by 502
Swami, V., Chamorro‐Premuzic, T., & Furnham, A. (2010) · Applied Cognitive Psychology · doi:10.1002/acp.1583 · Cited by 499
Cited by
Sorted by citations
Items 501–600 of 624
Fox, J., & Topor, L. (2021) · doi:10.1093/oso/9780197580349.003.0006
The measurement and prediction of conspiracy beliefs
Rose, C. (2017) · Figshare · doi:10.26686/wgtn.17060408.v1 · Cited by 3
Fox, J., & Topor, L. (2021) · doi:10.1093/oso/9780197580349.003.0005
Fox, J., & Topor, L. (2021) · doi:10.1093/oso/9780197580349.003.0001
Fox, J., & Topor, L. (2021) · doi:10.1093/oso/9780197580349.003.0007
Education, epistemic virtues, and the power of toleration
Drerup, J. (2021) · Routledge eBooks · doi:10.4324/9781003139133-7
(2020) · Emerald Group Publishing Limited eBooks · doi:10.1108/978-1-83867-443-420201016
Contemporary Challenges to Democracy
(2022) · Cambridge University Press eBooks · doi:10.1017/9781108779104.025
Diversifying Perspectives in Political Psychology
Osborne, D., & Sibley, C. G. (2022) · Cambridge University Press eBooks · doi:10.1017/9781108779104.040
(2019) · Elsevier eBooks · doi:10.1016/b978-0-12-812109-2.00028-8
"Politicization of Immunization: Radicalism in the Field of Science"
Shafti, S. S. (2022) · Biomedical Journal of Scientific & Technical Research · doi:10.26717/bjstr.2022.43.006833
"نظريات المؤامرة" وكورونا :جنون العظمة والشعبوية والقوة الناعمة والسلطة الثقافية و"الصحافة المجزأة"
القحطاني, س. ر. م. (2022) · Mağallaẗ idāraẗ al-maẖāṭir wa-al-azmāt · doi:10.26389/ajsrp.q050922
Identifying Themes of Right-Wing Extremism in Hindutva Discourse on TwitterPreprint
Ghasiya, P., Ahnert, G., & Sasahara, K. (2022) · doi:10.31219/osf.io/ufwh8
Ergebnisse 4: Erklärungsmodelle und multivariate Analyse
Grimm, J. (2022) · Springer eBooks · doi:10.1007/978-3-658-37316-0_11
Цифровая утопия: труд в эпоху искусственного интеллекта
Мартыненко, Т. С. (2022) · Journal of Economic Sociology · doi:10.17323/1726-3247-2022-2-129-140
Theorie des Weltbildmanagements
Grimm, J. (2022) · Springer eBooks · doi:10.1007/978-3-658-37316-0_4
King, S. (2022) · Journal of Economic Sociology · doi:10.17323/1726-3247-2022-2-141-146
Radicalization and Violent Extremism Depend on Envy; Conspiracy Ideation, Not AlwaysPreprint
Moncrieff, M., & Liénard, P. (2023) · doi:10.31234/osf.io/8ur5m
Bronner, G. (2021) · Hermann eBooks · doi:10.3917/herm.baech.2021.02.0159
Syafiq, M., Nurchayati, N., Laksmiwati, H., & Darmawanti, I. (2023) · Jurnal Psikologi Sosial · doi:10.7454/jps.2023.12
Furcht, Wut und Hoffnung: Ein biopsychosoziologisches Modell der radikalen Rechten
Wahl, K. (2023) · Springer eBooks · doi:10.1007/978-3-031-23577-1_2
Magyar, B., & Madlovics, B. (2021) · Central European University Press eBooks · doi:10.1515/9789633863701-011
Magyar, B., & Madlovics, B. (2021) · Central European University Press eBooks · doi:10.1515/9789633863701-014
PSIHOLOGIJA VJEROVANJA U TEORIJE ZAVJERE / PSYCHOLOGY OF CONSPIRACY BELIEFS
Jusić, M. (2023) · Pregled: časopis za društvena pitanja / Periodical for social issues · doi:10.48052/19865244.2022.3.57 · Cited by 1
Mallinas, S. R., Kievit, D. L., & Plant, E. A. (2023) · Journal of Experimental Social Psychology · doi:10.1016/j.jesp.2023.104489
Imhoff, R. (2023) · Springer eBooks · doi:10.1007/978-3-658-40118-4_41
Monological or Ideological? Themes and Psychosocial Predictors of Conspiracy BeliefPreprint
Cosgrove, T. J., Bahr, M., & Fritzon, K. (2023) · doi:10.31234/osf.io/2kwbx
Left-Wing and Anarchist Extremism in Italy
Marone, F. (2023) · Springer eBooks · doi:10.1007/978-3-031-30897-0_15
Fabella, F. E. T. (2023) · International Journal of Research and Review · doi:10.52403/ijrr.20230905
Was ist politischer Extremismus?
Jungkunz, S. (2023) · Springer eBooks · doi:10.1007/978-3-031-22747-9_2
陰謀論信念に影響を与える個人要因に対する熟慮的思考の調整機能の検討Preprint
Ozono, H., & Sakakibara, R. (2023) · doi:10.31234/osf.io/vgf6p
Andrade, G. E. (2024) · Springer eBooks · doi:10.1007/978-94-017-8706-2_105-1
Cosgrove, T. J., Bahr, M., & Fritzon, K. (2024) · doi:10.31234/osf.io/ka7jb
الإيمان بنظريات المؤامرة: المبادئ الأساسية لمجال بحثي مستجد
جان, و. ف. ب., & دوغلاس, م. د. ك. م. (2023) · The Egyptian Journal of Social and Behavioral Sciences · doi:10.21608/ejsbs.2023.347131
Put money where their mouth is? Willingness to pay for online conspiracy theory content
Cheng, J. W., Nishikawa, M., Ogura, I., & Fraser, N. A. R. (2024) · Telematics and Informatics Reports · doi:10.1016/j.teler.2024.100141 · Cited by 1
Fox, J., & Topor, L. (2021) · doi:10.1093/oso/9780197580349.002.0003
Multivariate Analyses and Technical Details
Fox, J., & Topor, L. (2021) · doi:10.1093/oso/9780197580349.005.0001
Fox, J., Topor, L., & Topor, L. (2021) · doi:10.1093/oso/9780197580349.002.0005
Reyna, C., Vazquez, K. J., Vazquez, M. A., Eadeh, F. R., & Harris, K. (2024) · Social and Personality Psychology Compass · doi:10.1111/spc3.12976
Campana, A., & Tanner, S. (2024) · Politique et Sociétés · doi:10.7202/1113424ar · Cited by 1
Kjelsberg, R. (2024) · Cogent Education · doi:10.1080/2331186x.2024.2410093 · Cited by 1
“…to whether you are on the left or right (Shermer & Linse, 2014), but which conspiracies you believe can however be heavily influenced and conspiracy belief does however have a correlation with more fringe political positions with simple solutions to complex problems (van Prooijen et al., 2015).”
Sorci, G. (2024) · Genealogy · doi:10.3390/genealogy8030100 · Cited by 1
解, 启. (2024) · Advances in Psychology · doi:10.12677/ap.2024.1410730
Liew, M., Larsen, E. M., Katz, J., Donaldson, K. R., Serody, M. R., & Mohanty, A. (2024) · Scientific Reports · doi:10.1038/s41598-024-76489-5 · Cited by 2
“Of note, a similar rationalization effect has been hypothesized to occur in those prone to conspiratorial beliefs (e.g. 46,47 )—a form of odd beliefs which are indeed related to delusions 48 .”
BackgroundDo stress and anxiety lead to belief in conspiracy theories?
Fox, N., & Williams, M. N. (2024) · Routledge Open Research · doi:10.12688/routledgeopenres.17925.2
de Graaf, B. (2024) · Oxford University Press eBooks · doi:10.1093/oso/9780197792469.003.0004
The Desire for Radical Redemption
de Graaf, B. (2024) · Oxford University Press eBooks · doi:10.1093/oso/9780197792469.003.0003
de Graaf, B. (2024) · Oxford University Press eBooks · doi:10.1093/oso/9780197792469.002.0004
de Graaf, B. (2024) · Oxford University Press eBooks · doi:10.1093/oso/9780197792469.005.0001
de Graaf, B. (2024) · Oxford University Press eBooks · doi:10.1093/oso/9780197792469.003.0007
Toward a Grounded Theory of Radical Redemption
de Graaf, B. (2024) · Oxford University Press eBooks · doi:10.1093/oso/9780197792469.003.0009
de Graaf, B. (2024) · Oxford University Press eBooks · doi:10.1093/oso/9780197792469.003.0005
Radical Redemption Narratives in Other Contexts
de Graaf, B. (2024) · Oxford University Press eBooks · doi:10.1093/oso/9780197792469.003.0008
de Graaf, B. (2024) · Oxford University Press eBooks · doi:10.1093/oso/9780197792469.003.0006
de Graaf, B. (2024) · Oxford University Press eBooks · doi:10.1093/oso/9780197792469.005.0002
de Graaf, B. (2024) · Oxford University Press eBooks · doi:10.1093/oso/9780197792469.003.0002
A Paradigm for Studying Extreme Belief and Behavior
de Graaf, B. (2024) · Oxford University Press eBooks · doi:10.1093/oso/9780197792469.003.0001
de Graaf, B. (2024) · Oxford University Press eBooks · doi:10.1093/oso/9780197792469.005.0003
de Graaf, B. (2024) · Oxford University Press eBooks · doi:10.1093/oso/9780197792469.003.0010
The Empire of Beliefs and Digital Worlds : What Does Contemporary Science Say?
Bronner, G. (2024) · The Tocqueville Review/La revue Tocqueville · doi:10.3138/ttr.45.2.11 · Cited by 1
Religiosity and University Students’ Attitudes About Vaccination Against COVID-19
Petrović, J., Šuvaković, U., & Nikolić, I. A. (2025) · Religions · doi:10.3390/rel16010058
Burns, M. D., & Ray, E. (2025) · Political Psychology · doi:10.1111/pops.70033
“For instance, the difficulty/inability to causally establish curvilinear effects is a frequently discussed limitation in prior work investigating nonlinear effects (Cichocka et al., 2018; van Prooijen et al., 2015), and the current research is no different.”
COVİD-19 Vaccine Hesitancy:The Mediating Role of Psychological and Political Factors
Turkileri, N., & Yukaruç, U. (2025) · İzmir İktisat Dergisi · doi:10.24988/ije.1514150 · Cited by 3
“In the post-truth era, political extremism from both right-and left-wing has been raising (Lewandowsky et al., 2017), which in turn leads to increase belief in conspiracy theories (Van Prooijen et al., 2015); yet, it is unclear what the causal order between these two is.”
Cosgrove, T. J., Bahr, M., & Fritzon, K. (2025) · doi:10.31234/osf.io/ka7jb_v2
Extreme Beliefs as Unshakable Identity Beliefs
Bortolotti, L. (2025) · Oxford University Press eBooks · doi:10.1093/9780197760222.003.0002
de Wit, J., & de Bruin, B. (2025) · Oxford University Press eBooks · doi:10.1093/9780197760222.003.0004
Music with a Message: Words, Music and Propaganda 2
Onič, T., Šivic, U., Turk, T., Livingstone, D., Kennedy, V., Križan, A., Todorović, T., Kolarič, J., Marković, A., Težak, K., et al. (2025) · doi:10.18690/um.ff.3.2025
Political Engagement and Extremism: Observations from the Interpretive Social Sciences
Mazur, L. B., Nika, C., & Knorr, A. (2025) · Theory and history in the human and social sciences · doi:10.1007/978-3-031-89741-2_4
Kay, C. S., & Hart, J. (2025) · Personality and Individual Differences · doi:10.1016/j.paid.2025.113365
Uscinski, J. E. (2018) · Oxford University Press eBooks · doi:10.1093/oso/9780190844073.002.0005
Uscinski, J. E. (2018) · Oxford University Press eBooks · doi:10.1093/oso/9780190844073.002.0003
Johnson, T. J., Kaye, B. K., & Park, C. S. (2025) · Journalism & Mass Communication Quarterly · doi:10.1177/10776990251360688
“Extreme ideological intensity, regardless of direction, predicts a higher susceptibility to conspira-torial thinking because of a cognitive predisposition toward motivated reasoning and distrust of outgroup information (Van Prooijen et al., 2015).”
Lipińska, M., & Jemielniak, D. (2025) · Online Information Review · doi:10.1108/oir-12-2024-0756
Pourquoi devient-on conspirationniste ?
Drob, T. (2021) · doi:10.64628/aap.w53rmrun3
Expressions of Partisanship Among Young Political Supporters on TikTok in the United States
Akter, S., & Fichman, P. (2025) · Social Media + Society · doi:10.1177/20563051251370914 · Cited by 3
“Conspiracies are often distributed across ideological lines (Van Prooijen & Douglas, 2017) and are associated with political affiliation (Uscinski et al., 2016), degree of political extremism (Van Prooijen et al., 2015), and with low political trust (Douglas et al., 2019).”
Lu, Y. (2025) · Political Behavior · doi:10.1007/s11109-025-10073-z
“Political extremism also leads to belief in conspiracy theories (van Prooijen et al. 2015).”
Andrade, G. E. (2025) · Springer eBooks · doi:10.1007/978-94-024-2252-8_105
Extremism in the Age of the Internet
Atay, Y. (2025) · IGI Global eBooks · doi:10.4018/979-8-3373-7406-2.ch008
Obaidi, M., & Kunst, J. (2025) · Cambridge University Press eBooks · doi:10.1017/9781009407892.005
Christoph, S., Hidalgo, O., Yendell, A., & Schweitzer, M. C. (2025) · Open Research Europe · doi:10.12688/openreseurope.21967.1
“Am I My Fellow Citizens’ Keeper?” Distrust, Democratic Backsliding, and Conspiracy Theories
Dumitru, A. C. (2025) · Constellations · doi:10.1111/1467-8675.70030
Disrupted Voter Loyalty as a Political Marketing Challenge
Erdem, E., & Nasır, S. (2025) · IGI Global eBooks · doi:10.4018/979-8-3373-4089-0.ch004
Conspiracy Theories and Online Dating: It’s a (Mis)match!
Green, R., Kamitz, L. C., Toribio‐Flórez, D., Biddlestone, M., Gasking, F., Sutton, R. M., & Douglas, K. M. (2026) · Personality and Social Psychology Bulletin · doi:10.1177/01461672251399448
Gibt es mündige Verschwörungstheoretiker*innen? Über Kritik und ihre Verfallsformen
Drerup, J. (2026) · Bürgerbewusstsein · doi:10.1007/978-3-658-50019-1_5
Hamas Conspiracy Theories: Personality and Demographic Correlates of Three Conspiracy Theories
Furnham, A. F. (2026) · Psychology · doi:10.4236/psych.2026.172006
Conspiracy as a Defense: The Role of Defensive Styles in the Endorsement of Conspiracy Theories
Antichi, L., Giannini, M., Tosti, A. E., Guazzini, A., & Gursesli, M. C. (2026) · Psychological Reports · doi:10.1177/00332941261423092
Persistent beliefs: Political extremism predicts ideological stability over timePreprint
Krouwel, A. P. M., van Prooijen, J., & Zwicker, M. V. (2022) · OSF Preprints (OSF Preprints)
Self-citationΔ Empathic Intelligence in Scope and Practice
Schroder, V. (2026) · Theory & Psychology · doi:10.1177/09593543261418626
“Van Prooijen et al.’s (2015) quadratic model captures how oversimplified moral frames and purity narratives reduce perspective integration, while more moderate positions reflect progressively more pluralistic apertures.”
DaVisio, K., Malet, D., Miller-Idriss, C., Dashtgard, P., & Daymon, C. (2026) · Behavioral Sciences of Terrorism and Political Aggression · doi:10.1080/19434472.2026.2633398
Firdiani, N. F., Wardhana, I. M. W., Kruglanski, A. W., Hauser, L. L., & Kopparumsolan, V. (2026) · Frontiers in Social Psychology · doi:10.3389/frsps.2026.1744932 · Cited by 2
Behind the Screen: Investigating ChatGPT’s Dark Personality Traits and Conspiracy Beliefs
Rutinowski, J., Weber, E., & Pauly, M. (2026) · Human Behavior and Emerging Technologies · doi:10.1155/hbe2/7230525 · Cited by 4
The Impact of the Threat of Death on Self-Gifting: The Moderated Mediation of Conspiracist Ideation
An, Q., Park, S., & Um, G. (2026) · Psychological Reports · doi:10.1177/00332941261437989
Scheffer, M. (2026) · Cambridge University Press eBooks · doi:10.1017/9781009699785.013
Comment on raisonne sur les explications : philosophie et psychologie du raisonnement explicatif
Mirabile, P. (2020) · theses.fr (ABES) · doi:10.70675/daef9c74z4dd4z4152za292zeb013ca8b625
Metadata
- Authors
- van Prooijen, J.-W., Krouwel, A. P. M., & Pollet, T. V.
- Affiliations
- VU University Amsterdam, The Netherlands
- Vrije Universiteit Amsterdam (NL)
- Venue
- Social Psychological and Personality Science
- Publisher
- SAGE Publications
- Published
- 2015-01-12
- Volume
- 6
- Issue
- 5
- Pages
- 570-578
- ISSN
- 1948-5506 (ISSN-L)
- 1948-5514
- OpenAlex
- W2327590731
- Cited by
- 626
- References
- 41
- Citations by year
- 2026: 38 · 2025: 62 · 2024: 69 · 2023: 71 · 2022: 115 · 2021: 111 · 2020: 44 · 2019: 29 · 2018: 54 · 2017: 17 · 2016: 8 · 2015: 8
- FWCI
- 96.21
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Social Psychological and Personality Science (publishedVersion)
- VU Research Portal (publishedVersion)
- Northumbria Research Link (Northumbria University) (submittedVersion)
- Data Archiving and Networked Services (DANS) (submittedVersion)
- Topics
- Social Sciences › Sociology and Political Science › Misinformation and Its Impacts
- Social Sciences › Sociology and Political Science › Terrorism, Counterterrorism, and Political Violence
- Social Sciences › Sociology and Political Science › Social and Intergroup Psychology
- Keywords
- political extremism, conspiracy beliefs, political ideology, left-wing extremism, right-wing extremism, attitude extremity
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review