HEXACO vs Big Five: A Detailed Comparison of Two Models

Since the 1990s, the Big Five personality model (OCEAN) has dominated personality psychology. It remains the most widely used framework in research and professional contexts. But it has a fundamental gap. HEXACO, developed by Michael Ashton and Kibeom Lee, was created precisely to fill it.

Parallel Origins, Divergent Results

Both models emerged from the same methodological approach: lexical analysis. The core idea is that important personality traits eventually become encoded in language — each culture developing words to describe differences between individuals.

Goldberg and colleagues analyzed lists of personality adjectives in English and identified 5 stable factors. Ashton and Lee replicated this analysis in many other languages (Dutch, French, Korean, Hungarian, Polish, Turkish, Filipino...) and consistently found 6 factors, not 5.

This sixth factor — Honesty-Humility — did not clearly emerge in English-language analyses because it was fragmented between the Big Five's Agreeableness and Conscientiousness. When analyzing languages lexically richer on this moral terrain, it became autonomous.

Side-by-Side Structure

The four middle factors have direct correspondences, but with important nuances. The real differences are in H and in the restructuring from N to E.

The H Factor: HEXACO's Core Contribution

What It Captures That Big Five Misses

Honesty-Humility measures four facets that form a coherent cluster:

1. Sincerity — speaking honestly, not manipulating
2. Fairness — not cheating, not deceiving for personal gain
3. Greed Avoidance — not pursuing status or wealth at others' expense
4. Modesty — not feeling superior to others

This cluster is cross-culturally robust. Across 12 different languages, it emerges as an independent factor.

Why It Got Lost in the Big Five

In the Big Five, these traits were scattered:

• Sincerity went partially into Agreeableness
• Greed avoidance went partially into Conscientiousness
• Modesty floated between the two

Result: no direct measure of moral integrity existed in the Big Five. HEXACO fills this space.

Neuroticism vs Emotionality: A Deep Restructuring

Big Five Neuroticism

Neuroticism captures emotional instability — the tendency to experience negative emotions (anxiety, anger, sadness), low stress tolerance, general vulnerability.

It includes:

• Anxiety
• Hostility / anger
• Depression
• Social shyness
• Impulsivity
• Vulnerability to stress

HEXACO Emotionality

HEXACO Emotionality is different. It captures:

• Emotional sensitivity — ease of being moved, affected, touched
• Anxiety — worries, apprehension about the future
• Dependence — need for emotional support from others
• Sentimentality — attachment to people and emotional connections

Crucial difference: hostility has been relocated to HEXACO Agreeableness. In HEXACO, anger and irritability are not part of Emotionality — they are part of the low pole of Agreeableness (A-).

This means someone can be emotionally sensitive (high E) WITHOUT being hostile or irritable. And someone can be emotionally calm (low E) but very irritable (low A). What Big Five grouped under Neuroticism, HEXACO dissociates into two distinct trajectories.

Practical Implications

A high-N profile in Big Five can correspond to two very different HEXACO profiles:

• High E + Low A: sensitive AND irritable
• High E + Neutral A: sensitive WITHOUT hostility

This distinction has major implications for understanding emotional styles, conflict management, and relational dynamics.

Agreeableness Restructured: Warmth Relocated

In the Big Five, Agreeableness includes warmth — the tendency to feel positive emotions toward others, interpersonal affection.

In HEXACO, interpersonal warmth has been moved to Emotionality — it is conceptualized as a form of emotional sensitivity directed toward others.

Result: HEXACO Agreeableness is conceptually "cooler" — it primarily measures cooperation and absence of hostility, not warm affection. And HEXACO Emotionality is broader than Neuroticism, including this warm relational dimension.

Variance Explained: What the Numbers Say

Cross-validation studies have compared variance explained in key behavioral criteria:

The gain is particularly marked for ethical and moral behaviors — logical, since H specifically captures this domain.

Comparison of Measurement Instruments

NEO-PI-R (Big Five)

• 240 items (full version)
• 5 domains × 6 facets = 30 facets
• Developed by Costa & McCrae
• First version: 1985, revised 1992
• Wide norms, validated in many clinical and organizational contexts
• Available in commercial version (PAR) and research version

HEXACO-PI-R

• 200 items (full version), 100 items (standard), 60 items (brief)
• 6 domains × 4 facets = 24 facets + interstitial Altruism facet
• Developed by Ashton & Lee
• First version: 2004, revised 2009
• Available free at hexaco.org for research and personal use

When to Use Which Model?

Use HEXACO When:

• Ethical integrity and honest behaviors are central to the question
• You want to distinguish emotional sensitivity from hostility
• Working in an organizational context where deviant behaviors are a concern
• You want a universally cross-culturally validated measure in many languages
• You have access to comparable data and recent literature

Use Big Five When:

• Working in a clinical context with validated normed tools (NEO-PI-R)
• You want to compare with a vast existing literature (30+ years of research)
• Using organizational tools already built on Big Five
• The population is English-speaking and normative comparisons matter

In Practice

Both models are often complementary. Serious research in personality psychology today often uses HEXACO — its structure is more robust cross-culturally. But Big Five remains the lingua franca in the field.

Critiques of HEXACO

1. Relative Newness

HEXACO is younger. The research database, though growing rapidly, is still smaller than Big Five's. Some criteria (e.g., predicting clinical outcomes) are less well studied.

2. Potential H Faking

Some researchers argue that the H factor is particularly susceptible to "faking" — respondents can easily simulate high integrity. Lee & Ashton responded that this is a general problem with self-reports, not specific to HEXACO.

3. Facet Delineation

The 24-facet structure is sometimes criticized for its lower granularity compared to NEO-PI-R's 30 facets. But Ashton & Lee argue that 4 facets per domain capture the essentials without noise.

Connection with Shinkofa

Shinkofa uses both HEXACO and Big Five in its holistic profiling system. These two models are not in competition — they are complementary.

Big Five remains present because it is the reference for 30 years of research and many users have already encountered it. HEXACO is added because it brings the H factor — the integrity dimension — and a more nuanced reading of emotionality.

In Shinkofa, your HEXACO profile dialogues with your Human Design profile: the H factor resonates with the Human Design concept of strategy and authority (acting from the true self vs. the conditioned self). And HEXACO Emotionality finds an echo in the emotional authority profile — people with emotional authority in Human Design often have significant E scores.

The goal is not to multiply labels, but to deepen self-understanding by crossing complementary lenses.