Is There a “Conspiratorial Personality”? What the Big Five Research Shows

Is there a “conspiratorial personality” — a set of traits that makes some people far more likely to believe conspiracy theories than others? The honest answer from decades of personality research is that there is no single conspiracy-prone type, but there is a recognizable pattern. At the level of the Big Five model (also called the Five Factor Model or the OCEAN model), the links to conspiracy belief are weak and inconsistent. The signals get clearer when you look at the HEXACO model’s honesty-humility trait and at a broader “conspiracy mindset” — a general tendency to see secret, malevolent forces behind events. Your thinking style, especially how analytical versus intuitive you are, often predicts belief more than any personality dimension. In short: personality tilts the odds, but it does not decide the outcome.

What researchers mean by a “conspiratorial personality”

In research terms, a “conspiratorial personality” refers to a stable tendency to explain events as the result of secret plots by powerful groups, rather than coincidence, complexity, or ordinary cause and effect. The technical label for this is conspiracist ideation, and researchers usually measure it with questionnaires that ask how strongly someone endorses a general suspicion of hidden control, sometimes called a conspiracy mindset or conspiracy worldview. This distinction matters because believing one conspiracy theory predicts believing others, even contradictory ones, which points to a stable underlying disposition rather than a belief in any single claim.

What the Big Five (Five Factor Model) studies actually show

The Big Five traits — Openness, Conscientiousness, Extraversion, Agreeableness, and Neuroticism, also called the Five Factor Model or OCEAN model — show only weak and inconsistent links to conspiracy belief when researchers pool the evidence. A 2019 meta-analysis by Goreis and Voracek, covering 96 studies and 12,086 participants, found no significant associations between any Big Five trait and conspiracy beliefs; the correlations hovered near zero (roughly −.02 for agreeableness to +.03 for neuroticism). At the broad Big Five level, your personality type barely moves the needle on conspiracy belief.

Newer, larger syntheses sharpen the picture without overturning it. A 2023 meta-analytic review in Psychological Bulletin by Bowes, Costello, and Tasimi found that, across many studies, agreeableness and conscientiousness were modest negative correlates (people higher on these traits endorsed fewer conspiracy ideas), while neuroticism and extraversion showed small positive associations. But the authors stressed these effects are weak and far smaller than the role played by other factors.

Why individual traits look inconsistent

The reason the Big Five sometimes appears to predict conspiracy belief and sometimes doesn’t is partly a measurement issue. A 2021 study by Bowes and colleagues across four samples (1,927 people) found only agreeableness and conscientiousness as consistent, modest negative correlates, with other traits near zero, and flagged intellectual humility — the willingness to revise your beliefs when evidence warrants — as a notable negative correlate. When a link appears, it is usually agreeableness, the trait behind trust and warmth toward others, that protects against conspiracist thinking. The takeaway is that normal-range personality gives a faint signal, not a fingerprint.

Why the HEXACO model explains more

The HEXACO model is a six-factor personality framework that adds a dimension called honesty-humility — sincerity, fairness, and a low desire to exploit or impress others — alongside the Big Five’s Emotionality in place of straight Neuroticism. This extra trait turns out to be the most consistent personality predictor of conspiracy belief. Jolley and colleagues (2019) first reported that conspiracy beliefs were negatively linked to honesty-humility, and the 2023 Bowes meta-analysis confirmed it. A 2025 preregistered study in two German samples (669 participants) by Voltz and colleagues found that low honesty-humility and low agreeableness both predicted stronger conspiracist ideation, while a general “Dark Tetrad” factor (narcissism, Machiavellianism, psychopathy, and sadism) was a strong predictor. The single personality feature that shows up most reliably is low honesty-humility — a deficit of sincerity and fairness, not a quirk of curiosity.

The strongest predictor isn’t a trait — it’s a mindset

The strongest single predictor of conspiracy belief is not any personality trait but a general conspiracy mindset — a broad suspicion that hidden, malevolent forces shape events. Scales like the Conspiracy Mentality Questionnaire (Bruder et al., 2013) measure this predisposition, and it predicts belief in specific conspiracy theories better than any individual Big Five score. Trust is central here: study after study links lower interpersonal and institutional trust to higher conspiracy belief, and the relationship runs in both directions. A pervasive suspicion of others, more than any personality type, is the engine behind conspiracist thinking. Work by Imhoff and Lamberty (2017, 2018) also shows this mindset is not confined to one end of the political spectrum, which undercuts the idea that it is simply a marker of a particular ideology.

Your thinking style predicts more than your type

Your thinking style — specifically how analytical versus intuitive you are — predicts conspiracy belief more reliably than your personality type does. The dual-process model of cognition distinguishes analytical thinking, a slow and deliberate evaluation of evidence, from intuitive, gut-feeling processing. A large body of research links a more intuitive style to higher conspiracy endorsement. In one set of studies, conspiracist thinking (though not clinical paranoia) was associated with poorer performance on the Cognitive Reflection Task, a brief test of analytical versus impulsive answering (Alsuhibani et al., 2022, across samples totaling over 2,600 people). How carefully you weigh evidence predicts conspiracy belief more reliably than which personality type you score. This is encouraging, because thinking habits are more malleable than temperament.

The clinical end: when suspicion becomes something else

At the extreme, conspiracist thinking overlaps with clinical personality traits like paranoia and schizotypy rather than with ordinary personality variation. The 2023 Bowes meta-analysis found that the strongest correlates of conspiracy belief came from abnormal-range traits — schizotypy, paranoia, psychoticism, and antagonism — not from the normal Big Five. People higher in these traits tend to perceive threat and danger more readily and feel superior to or hostile toward others. Research by Alsuhibani and colleagues (2022) confirms that conspiracy belief and paranoia, while related, form distinct factors with different predictors. At the extreme, conspiracist thinking overlaps with psychological traits linked to distorted threat perception, not with ordinary personality variation.

Can a conspiratorial tendency change?

A conspiratorial tendency can shift because the bigger drivers — thinking habits and trust — are more malleable than fixed temperament. All of the personality links are correlational, not destiny, and personality itself is relatively stable but not set in stone. Because analytical thinking and low trust are the larger drivers, interventions that build media literacy, statistical reasoning, and source-checking tend to matter more than any personality profile. Knowing your own tilt — say, a low score on agreeableness or honesty-humility — is useful self-knowledge, not a verdict. If you want to see where you land on these dimensions, an assessment at https://personalitree.com/ can map your Big Five and HEXACO-style profile in about ten minutes, which is a practical first step toward understanding your own cognitive defaults.

What this means for self-awareness

The practical takeaway is that susceptibility to conspiracy belief is a habit of mind you can notice and counter, not a fixed trait you are stuck with. The science gives a clear, if humbling, message: there is no tidy conspiratorial personality type you can screen for with a quiz. The Big Five barely predicts it, the HEXACO’s honesty-humility predicts it modestly, and a general mindset of distrust plus a less analytical thinking style predict it best. The most useful takeaway is that susceptibility is a habit of mind you can notice and counter, not a fixed trait you’re stuck with. Tools like personalitree.com make it easy to learn your baseline, but the real leverage is in how you engage with evidence day to day.

Frequently Asked Questions

Is there a specific personality type that believes conspiracy theories?

No single personality type reliably predicts conspiracy belief. Large meta-analyses of the Big Five traits find only weak or negligible links, and any signal usually comes from lower agreeableness. The pattern is a faint tendency, not a diagnostic profile, so you cannot sort believers from non-believers by personality alone.

Which personality trait is most linked to conspiracy beliefs?

The most consistent trait-level finding comes from the HEXACO model’s honesty-humility dimension. People who score lower in honesty-humility — meaning less sincerity, fairness, and modesty — tend to endorse more conspiracy ideas, and this link has replicated across several studies, including a 2025 preregistered sample of 669 Germans.

Do Myers-Briggs (16 personality) types predict conspiracy belief?

There is essentially no research linking the 16 Myers-Briggs types to conspiracy belief, and the MBTI framework itself measures preferences rather than the trait dimensions studied in this literature. The evidence base sits almost entirely with the Big Five and HEXACO models, so any claim connecting an MBTI type to conspiracy belief would be speculation.

Is believing conspiracy theories a sign of mental illness?

Not usually. Everyday conspiracist thinking is common and distinct from clinical paranoia or psychosis. Research shows the two are correlated but separate factors; only at the extreme do conspiracy beliefs overlap with traits like schizotypy or paranoia that are associated with psychological conditions.

Can you reduce how susceptible you are to conspiracy theories?

To a meaningful degree, yes. Because lower analytical thinking and low trust are stronger predictors than personality, habits like checking sources, slowing down before sharing, and practicing evidence-based reasoning can reduce susceptibility. Personality is stable, but thinking style is trainable.