The Big Five model has been the working standard in personality research for thirty years. It captures most of the variance in how people differ from each other. Most — but not all. One piece of variance kept showing up in cross-language studies that the Big Five did not measure cleanly. That piece is what HEXACO calls Honesty-Humility.
This post explains what the trait measures, where it came from, and why a sixth factor was needed in the first place.
How the trait was discovered
The Big Five was built using the "lexical hypothesis" — the idea that personality traits important enough to matter will end up encoded as words in a language. Researchers analyzed personality adjectives in English, found the patterns that clustered together, and named the resulting five factors 1.
Kibeom Lee and Michael Ashton did the same exercise across multiple languages — Korean, German, Italian, Hungarian, French, Polish, Dutch. When they pulled out the factor structure, five of the factors looked roughly familiar. A sixth factor showed up consistently that the original English-only Big Five had folded partly into Agreeableness 2.
The sixth factor was Honesty-Humility.
What the trait measures
Honesty-Humility captures the tendency to be sincere, fair, modest, and unwilling to exploit others — versus the tendency to be deceptive, entitled, status-driven, and willing to use other people for personal gain.
The trait has four facets in the HEXACO model:
Sincerity. Honest in interactions, not given to manipulation or flattery. Fairness. Avoiding fraud, corruption, and free-riding even when no one would notice. Greed Avoidance. Not particularly interested in wealth, status, or luxury for its own sake. Modesty. Seeing oneself as ordinary; not entitled to special treatment.
A high-H person scores high on all four. A low-H person scores low. Mid-range scores are common and predict mid-range behavior.
Why the Big Five missed it
The Big Five does measure some of this content, but it scatters it across Agreeableness and other traits. Big Five Agreeableness mixes "easy to get along with" with "honest and fair" — two different things that turn out to be only loosely correlated.
A person can be agreeable (warm, cooperative, easy to work with) and still willing to bend rules for personal benefit. A person can be disagreeable (blunt, argumentative, prickly) and refuse to cut a single ethical corner. The Big Five does not separate these cleanly. HEXACO does.
That separation is what makes Honesty-Humility worth measuring.
What the trait predicts
The H-factor has been validated against a wide range of behaviors. A few of the more robust findings:
Workplace integrity. Low H predicts counterproductive work behavior, theft, and rule violations — even when Conscientiousness and Big Five Agreeableness are controlled for 3. The trait adds predictive power beyond what the Big Five captures.
Cooperation in economic games. In dictator games, ultimatum games, and trust games, high-H players share more, take less, and reciprocate more. The effect replicates across cultures 4.
Dark personality traits. Narcissism, Machiavellianism, and psychopathy all cluster at the low end of Honesty-Humility. The H-factor captures dark-triad variance better than any single Big Five trait 5.
White-collar deviance. Studies of fraud, cheating on tests, and academic dishonesty consistently find low H as a stronger predictor than low Agreeableness or low Conscientiousness alone.
What high H looks like in life
A person high in Honesty-Humility tends to:
- Tell the inconvenient truth even when a polite lie would be easier
- Decline opportunities that benefit them at someone else's expense, even when no one would know
- Show low interest in luxury goods, status symbols, or being recognized
- Treat people the same regardless of what those people can do for them
This is not the same as being agreeable or kind. A high-H person can be blunt, demanding, or socially awkward. The trait is about fairness and lack of exploitative tendencies, not warmth.
What low H looks like
A person low in Honesty-Humility tends to:
- Use charm or flattery strategically
- Find ethical rules negotiable when the upside is large enough
- Care a lot about status, wealth, and being seen as important
- Feel entitled to special treatment
Low H is not the same as being a bad person. The trait is a continuum and most low-H people live ordinary lives without major ethical violations. But the trait does shift the odds of those violations — measurably and replicably.
Why the trait may matter for you
The H-factor is the place where personality measurement crosses into something like ethics. That makes it useful in contexts where the cost of getting a person wrong is high: hiring for trust-sensitive roles, choosing a business partner, evaluating a long-term relationship.
For most everyday self-knowledge, the Big Five is enough. But if a person specifically wants to understand their relationship with rules, fairness, and exploitation — or wants to read other people on those dimensions — Honesty-Humility is the cleanest single measurement available.
Take the HEXACO version of the assessment (12 min, free) →
References
Footnotes
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Goldberg, L. R. (1990). An alternative "description of personality": The Big-Five factor structure. Journal of Personality and Social Psychology, 59(6), 1216–1229. https://doi.org/10.1037/0022-3514.59.6.1216 ↩
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Ashton, M. C., & Lee, K. (2007). Empirical, theoretical, and practical advantages of the HEXACO model of personality structure. Personality and Social Psychology Review, 11(2), 150–166. https://doi.org/10.1177/1088868306294907 ↩
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Lee, K., Ashton, M. C., & de Vries, R. E. (2005). Predicting workplace delinquency and integrity with the HEXACO and five-factor models of personality structure. Human Performance, 18(2), 179–197. https://doi.org/10.1207/s15327043hup1802_4 ↩
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Hilbig, B. E., & Zettler, I. (2009). Pillars of cooperation: Honesty-humility, social value orientations, and economic behavior. Journal of Research in Personality, 43(3), 516–519. https://doi.org/10.1016/j.jrp.2009.01.003 ↩
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Lee, K., & Ashton, M. C. (2014). The dark triad, the big five, and the HEXACO model. Personality and Individual Differences, 67, 2–5. https://doi.org/10.1016/j.paid.2014.01.048 ↩