Oct 5, 2026·Special Population & Related Conditions
Narcissism and IQ: Are Narcissists Smarter, or Do They Just Think They Are?
Narcissism IQ research finds no link with measured intelligence, but grandiose narcissists consistently rate their own intelligence higher than tests support.
Dr. Russell T. WarneChief Scientist
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Narcissism IQ research gives a consistent answer: narcissistic traits are essentially unrelated to measured intelligence, so narcissists are no smarter or duller than anyone else on average. What narcissism does predict is how intelligent people believe they are, and people high in grandiose narcissism reliably rate their own intelligence above what their test scores support.
This article covers what the measured-IQ data show, the gap between self-rated and tested intelligence, how the grandiose and vulnerable forms of narcissism differ, why this research is hard to do well, and how narcissism changes with age. Throughout, "narcissism" means a personality trait that everyone has to some degree, measured on a continuum with questionnaires. Narcissistic personality disorder is a clinical diagnosis made by a psychiatrist or psychologist, and it is not what most of these studies measure.
What the measured-IQ data show
The broadest evidence comes from a 2013 meta-analysis by O'Boyle, Forsyth, Banks and Story. They pooled 48 independent samples that measured general mental ability alongside the "Dark Triad" of Machiavellianism, narcissism and psychopathy. Intelligence "showed no consistent relation with any DT trait." Narcissists, on this evidence, are neither unusually bright nor unusually dull.
Later work that looked at narcissism in more detail found the same thing. Across four studies with 1,141 participants in total, Zajenkowski, Czarna, Szymaniak and Dufner reported that both grandiose and vulnerable narcissism "were unrelated to objective intelligence." Their participants took standard ability tests, so these are scored results rather than impressions.
Psychopathy, the trait that shows up next to narcissism in most of this literature, has its own body of IQ research with a slightly different result, and the two are worth keeping apart.
The gap between self-rated and tested intelligence
Here the picture changes. Most people's self-estimates track their tested ability only loosely. A meta-analysis by Freund and Kasten, covering 154 effect sizes from 41 studies, put the overall "correlation" (a number from -1 to +1 describing how closely two measures move together) between self-estimated and measured cognitive ability at r = .33. That leaves plenty of room for personality to push self-ratings up or down.
Narcissism is one of the strongest pushes upward.
• Early evidence: In a 1994 study of 146 college students, Gabriel, Critelli and Ee found that narcissism predicted "positive illusions" about intelligence, meaning self-ratings higher than tested scores, in both men and women.
• Grandiose narcissism and self-perceived intelligence: In the Zajenkowski studies, grandiose narcissism went with high self-perceived intelligence and explained more variance in it than either measured intelligence or the Big Five personality traits did. In other words, knowing how narcissistic someone is told the researchers more about how smart that person thought they were than knowing how smart the person actually tested.
• Experimental evidence: In two later experiments, Zajenkowski, Sedikides, Gignac and colleagues temporarily raised participants' narcissism with a validated procedure, and self-assessed intelligence went up with it. That suggests narcissistic self-views can inflate intelligence ratings directly.
This is a specific case of a broader tendency for confidence and competence to come apart. If you are interested in the general version, our article on the Dunning-Kruger effect explains what that research does and does not show.
Grandiose and vulnerable narcissism are different
Narcissism comes in at least two forms that behave very differently. Miller and colleagues, factor-analyzing three common narcissism questionnaires, found two distinct dimensions, grandiose and vulnerable, whose patterns of links to personality and psychopathology were essentially unrelated. Grandiose narcissism involves dominance and an inflated sense of self, while vulnerable narcissism involves defensiveness and hypersensitivity to others' judgments.
The two forms split cleanly on intelligence self-views. In the Zajenkowski studies, vulnerable narcissism was unrelated to self-perceived intelligence, and it went with increased distress in the context of IQ testing. Grandiose narcissism showed the opposite profile: reduced distress during testing, along with lower engagement in the cognitive tasks. People high in grandiose narcissism also based their well-being partly on intelligence and saw it as important for success in many areas of life, especially social relationships.
Grandiose narcissism can be split further. Zajenkowski, Gignac and colleagues looked at its self-promoting side ("admiration") and its self-defensive side ("rivalry"). Admiration went with higher self-assessed intelligence, while rivalry went with rating other people's intelligence lower. One side of grandiose narcissism inflates the self, and the other deflates everyone else.
Why narcissism and IQ are hard to measure together
Several features of this research are easy to overlook.
• Self-report on both sides: Narcissism is measured with questionnaires, and so is self-estimated intelligence. Two self-reports from the same person share response habits, which is why studies that also include a real ability test carry the most weight.
• Effort during testing: The finding that grandiose narcissism goes with lower engagement in cognitive tasks matters for any IQ score. A test result assumes the person tried, and low effort can pull a score below true ability, while vulnerable narcissism's added test distress could do the same through anxiety.
• Who is studied: Most samples are students or community volunteers with ordinary levels of narcissism. Very few IQ studies involve people diagnosed with narcissistic personality disorder, so the results describe the trait in the general population.
• Abilities beyond IQ: The same overconfidence shows up for emotional skills. Zajenkowski and colleagues found that grandiose narcissism was positively related to self-reported emotional intelligence, while ability-based emotional intelligence, once self-reports were accounted for, was negatively related to it.
An IQ test cannot detect narcissism, and a narcissism questionnaire says nothing reliable about intelligence. Concerns about a personality disorder, in yourself or someone close to you, are a question for a psychiatrist or clinical psychologist.
Narcissism, age and self-views
Narcissism is fairly stable in the sense that people keep their rank relative to others, but average levels fall with age. Wetzel, Grijalva, Robins and Roberts followed a group from about age 18 (486 people) to about age 41 (237 of them). Rank-order consistency was strong (latent correlations from .61 to .85), and overall narcissism dropped substantially, by about four-fifths of a standard deviation (d = -0.79).
That study did not measure intelligence. Because narcissism and tested intelligence are unrelated to begin with, the decline is a change in self-views, and whether self-estimates of intelligence come down along with it over the same years is still an open question.
Frequently asked questions
Do narcissists have a high IQ?
No. A meta-analysis of 48 samples found no consistent relation between narcissism and intelligence, and later studies found both grandiose and vulnerable narcissism unrelated to tested intelligence.
Do narcissists think they are smarter than they are?
People high in grandiose narcissism do. Their self-rated intelligence is consistently higher than their tested ability, and experiments that temporarily raise narcissism also raise self-assessed intelligence.
What is the average IQ of a narcissist?
There is no distinct narcissist IQ. Because narcissism and measured intelligence are essentially uncorrelated, people high in narcissism score across the same range as everyone else.
Is vulnerable narcissism linked to intelligence?
Vulnerable narcissism is unrelated to both tested and self-rated intelligence. It is linked to greater distress during IQ testing.
Can high intelligence cause narcissism?
The evidence does not support that. Measured intelligence does not predict narcissism, while narcissism does predict inflated beliefs about one's own intelligence.
The takeaway
Narcissism IQ studies separate two questions that often get mixed up. On tested intelligence, narcissists are ordinary: the trait is essentially unrelated to IQ. On self-rated intelligence, grandiose narcissism stands out, with people high in it reliably believing they are smarter than their scores show, while vulnerable narcissism brings more test anxiety than overconfidence. The cleanest way to close that gap is an actual measurement, so if you want a number grounded in performance rather than self-perception, try a professionally developed IQ test with published norms.
References
1. O'Boyle, E. H., Forsyth, D., Banks, G. C., & Story, P. A. (2013). A meta-analytic review of the Dark Triad-intelligence connection. Journal of Research in Personality, 47(6), 789-794. doi.org
2. Zajenkowski, M., Czarna, A. Z., Szymaniak, K., & Dufner, M. (2020). What do highly narcissistic people think and feel about (their) intelligence? Journal of Personality, 88(4), 703-718. doi.org
3. Freund, P. A., & Kasten, N. (2012). How smart do you think you are? A meta-analysis on the validity of self-estimates of cognitive ability. Psychological Bulletin, 138(2), 296-321. doi.org
4. Gabriel, M. T., Critelli, J. W., & Ee, J. S. (1994). Narcissistic illusions in self-evaluations of intelligence and attractiveness. Journal of Personality, 62(1), 143-155. doi.org
5. Zajenkowski, M., Sedikides, C., Gignac, G. E., Górniak, J., & Maciantowicz, O. (2022). Induced narcissism increases self-assessed intelligence: Implications for academic goal-pursuit, expected academic achievement, and psychological well-being. Journal of Research in Personality, 101, 104311. doi.org
6. Miller, J. D., Hoffman, B. J., Gaughan, E. T., Gentile, B., Maples, J., & Campbell, W. K. (2011). Grandiose and vulnerable narcissism: A nomological network analysis. Journal of Personality, 79(5), 1013-1042. doi.org
7. Zajenkowski, M., Gignac, G. E., Leniarska, M., Turek, A., & Czepiel, Z. (2023). I'm smart, you're dumb! Narcissistic admiration and rivalry correlate with self- and other-assessed intelligence. Personality and Individual Differences, 211, 112248. doi.org
8. Zajenkowski, M., Maciantowicz, O., Szymaniak, K., & Urban, P. (2018). Vulnerable and grandiose narcissism are differentially associated with ability and trait emotional intelligence. Frontiers in Psychology, 9, 1606. doi.org
9. Wetzel, E., Grijalva, E., Robins, R. W., & Roberts, B. W. (2020). You're still so vain: Changes in narcissism from young adulthood to middle age. Journal of Personality and Social Psychology, 119(2), 479-496. doi.org
Hero image: Hand mirror by Eda Lord Dixon, The Metropolitan Museum of Art, released under CC0 (creativecommons.org/publicdomain/zero/1.0). Via Wikimedia Commons.
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