Most people who know their Big Five scores have never heard of HEXACO. This is a gap worth closing. HEXACO is the most significant development in trait personality theory since the Big Five was established — and the dimension it adds turns out to predict some of the most important things about how a person operates.
How HEXACO was developed — and why researchers felt the Big Five was incomplete
The Big Five emerged from factor analysis of personality-descriptive adjectives in the English language. It's been replicated across dozens of languages and cultures. It predicts real-world outcomes reliably. And yet, researchers working with personality-descriptive terms in languages outside the English/German core noticed something: the five-factor solution didn't hold up as cleanly in Korean, Hungarian, Filipino, and several other languages.
When personality researchers Kibeom Lee and Michael Ashton ran larger cross-language factor analyses in the early 2000s, they consistently found six factors, not five. The sixth factor — which didn't map neatly onto any of the original Big Five dimensions — they named Honesty-Humility.
Honesty-Humility captures a cluster of traits including sincerity, fairness, modesty, and the avoidance of greed. People high in Honesty-Humility are reluctant to manipulate others, avoid exploitative behavior even when they could get away with it, and don't pursue status at the expense of others. People low in Honesty-Humility are comfortable with deception, feel entitled to special treatment, and will break rules when it benefits them.
The other five HEXACO dimensions — Emotionality, eXtraversion, Agreeableness, Conscientiousness, Openness — correspond roughly to their Big Five equivalents (though with some meaningful differences, particularly for Agreeableness and Emotionality, which maps to a modified version of Neuroticism).
What Honesty-Humility measures — and why it predicts things the Big Five cannot
The Honesty-Humility dimension is the most practically significant addition to personality trait theory in decades. Here's why.
The Big Five can detect a lot: it predicts job performance (conscientiousness), relationship quality (neuroticism, agreeableness), creative output (openness), and leadership emergence (extraversion). But there is a class of behavior it predicts poorly — specifically, ethical behavior under competitive pressure.
When someone's interests conflict with others', and when they have the power and opportunity to exploit that conflict, what do they do? Do they take the extra share when no one's looking? Do they bend the rules when it benefits them? Do they present themselves honestly even when a strategic misrepresentation would serve them better?
These behaviors correlate poorly with Big Five traits in isolation. Conscientious people can be manipulative. Agreeable people can still be self-interested in ways they conceal. The Big Five doesn't give you a reliable prediction of what someone does when the rules aren't enforced and the stakes involve personal advantage.
Honesty-Humility predicts this reliably.
Research shows that Honesty-Humility correlates with:
- Lower rates of delinquency and antisocial behavior, after controlling for conscientiousness and agreeableness
- Reduced likelihood of occupational fraud in workplace samples
- Less counterproductive work behavior — the soft forms of rule-bending, theft of time, and misrepresentation that are hard to detect
- Lower Dark Triad scores, particularly Machiavellianism — the strategic exploitation dimension
- More equitable behavior in economic games, even in anonymous conditions where cheating carries no consequence
The last point is particularly significant: Honesty-Humility predicts fair behavior when no enforcement mechanism exists. It describes a genuine internal orientation, not just compliance with external rules.
How HEXACO scores map against the Big Five on each dimension
For people who already know their Big Five scores, here's how the frameworks relate:
Honesty-Humility (H) — New dimension, no Big Five equivalent. Most closely related to low Machiavellianism and high Agreeableness, but distinct from both.
Emotionality (E) — Roughly corresponds to Big Five Neuroticism, but with a different emphasis. HEXACO Emotionality captures anxiety, fearfulness, and emotional dependency more cleanly; Big Five Neuroticism captures emotional instability and negative affect more broadly. People high in Big Five Neuroticism but low in HEXACO Emotionality tend to be temperamentally irritable without being particularly fearful or dependent.
eXtraversion (X) — Similar to Big Five Extraversion, with slightly more emphasis on self-confidence and social leadership rather than pure sociability.
Agreeableness (A) — In HEXACO, Agreeableness captures forgiveness, patience, and tolerance toward others more specifically, while leaving some of the cooperation and warmth content in Honesty-Humility. This separation is more precise than the Big Five version.
Conscientiousness (C) — Essentially the same as Big Five Conscientiousness. Strong predictor of job performance, goal persistence, and organizational behavior in both frameworks.
Openness (O) — Essentially the same as Big Five Openness/Openness to Experience. Predicts creative performance, intellectual curiosity, and unconventional behavior.
What your HEXACO scores tell you about how you operate under pressure
Most personality tests reveal patterns that are relatively stable across low-stakes contexts. HEXACO adds a dimension that specifically activates under high-stakes conditions — when there's something to gain by being less honest, when you have power over someone who can't easily push back, when following the rules would cost you something.
Knowing your Honesty-Humility score tells you something that most personality frameworks can't: what your default orientation is when the cost of honesty is real. This has clear implications for:
Professional contexts: High H-H people in competitive environments often accumulate trust over long periods because they don't exploit information asymmetry. Low H-H people may perform well in the short term by leveraging advantages without ethical constraint, but tend to damage relationships over time.
Financial and business decisions: Research finds that H-H scores predict behavior in economic games better than any other HEXACO or Big Five dimension. The high-H-H person splits windfalls fairly; the low-H-H person takes the maximum available.
Personal relationships: Low H-H in combination with low attachment security is a particularly consequential profile — the person who is both strategically oriented and not deeply invested in the emotional reality of the relationship.
How Memrov measures HEXACO from your conversation history
Standard HEXACO tests — including the 60-item and 100-item instruments available online — rely on self-report. You rate statements like "I would be tempted to buy stolen goods if I could get a good deal." The problem is that low-H-H people are precisely the ones most likely to answer this question in whatever way makes them look better.
This is the core limitation of measuring honesty via self-report: the people you most want to measure accurately are the ones most likely to misreport.
Behavioral inference from AI conversation history addresses this. Honesty-Humility signals show up in how people reason about fairness in interpersonal situations, how they frame moral tradeoffs in advice-seeking, how they describe other people's behavior, and whether they apply the same standards to themselves as to others. These patterns accumulate across hundreds of interactions and aggregate into a more stable signal than a single questionnaire response.
Memrov includes HEXACO as one of six frameworks in its full personality profile. The reading places your H-H score in context with your other five dimensions — because H-H in combination with high conscientiousness reads very differently from H-H in combination with high Machiavellianism.
If you know your Big Five scores but have never run HEXACO, there's a good chance your picture of yourself has a significant gap in it.
Get your HEXACO profile as part of a full six-framework personality reading — free →