HEXACO's defining feature is a sixth dimension, Honesty-Humility, which gives it an edge for predicting morally relevant behavior; the Big Five remains a strong, well-validated choice for many wellbeing and emotion outcomes. The right model depends on what you need to predict, not on which one is objectively superior.
TL;DR:
- HEXACO’s 60 item form takes about 12 minutes for screening, while its 100 item version takes about 20 minutes and is recommended for most research.
- Choose the 200 item HEXACO form or a full NEO instrument when facet level reliability matters; short forms suit screening and large surveys.
- Do not translate domain scores directly between models: HEXACO Agreeableness emphasizes patience, while Big Five Agreeableness centers more on warmth and compassion.
- IPIP markers offer a public domain Big Five option without licensing fees, making them useful when open access and replication matter.
- When a project examines both honesty and emotional wellbeing, measure both models or compare relevant facets instead of forcing one choice.
Table of Contents
- Big Five Model: Domains and Measurement Basics
- HEXACO Model: The Six Domains and Honesty-Humility
- Key Conceptual Differences and Trait Mapping
- Measurement and Instruments: Practical Guidance
- What the Evidence Says: Predictive Validity and Meta-Analytic Findings
- How to Choose the Right Model or Measure for Your Project
- A Researcher's Take on Choosing Between the Models
- Explore Your Own Personality Profile With IQ Career Lab
- FAQ
- Sources
Big Five Model: Domains and Measurement Basics
The Big Five, also called the Five-Factor Model or OCEAN, organizes personality into five continuous dimensions rather than fixed types: Openness, Conscientiousness, Extraversion, Agreeableness, and Neuroticism. Each domain breaks into narrower facets, and facet-level data matters because two people can share the same domain score while differing sharply on the specific behaviors underneath it, according to the Big Five's domain and facet structure.
Researchers and practitioners typically choose among a few established measures:
- NEO-PI-R and related NEO instruments measure all five domains and their facets, often used in clinical and personality research.
- IPIP markers, developed by Goldberg, are public-domain items that replicate NEO-style facet structure without licensing costs.
- Short-form Big Five scales suit screening and large surveys; longer NEO-style forms suit facet-level research where reliability at the facet level matters.
The choice between short and long forms usually comes down to how much precision the research question demands.
HEXACO Model: The Six Domains and Honesty-Humility
HEXACO adds a sixth domain, Honesty-Humility, to five others that resemble but don't exactly duplicate their Big Five counterparts: Honesty-Humility, Emotionality, Extraversion, Agreeableness, Conscientiousness, and Openness to Experience. Honesty-Humility breaks into four facets: sincerity, fairness, greed avoidance, and modesty, each capturing a different angle on exploitation versus restraint in dealing with others.
HEXACO-PI-R materials are published in three lengths, each suited to a different purpose:
- The 60-item form takes about 12 minutes and works well for quick screening.
- The 100-item form takes about 20 minutes and is the version HEXACO-PI-R materials recommend for most research.
- The 200-item form exists for studies that need facet-level reliability.
HEXACO also redistributes some content found in Big Five Agreeableness and Neuroticism into its own Emotionality and Agreeableness domains, which is one reason identical trait labels don't always mean identical content.
Key Conceptual Differences and Trait Mapping
Shared labels across the two models create a common point of confusion. HEXACO Agreeableness emphasizes patience and tolerance of others' provocations, while Big Five Agreeableness leans more toward warmth and compassion. Similarly, HEXACO Emotionality covers sentimentality and emotional dependence, while Big Five Neuroticism centers more on anxiety and moodiness. The two models aren't simply the same five traits plus one extra factor: several domains are rotated and reshuffled, not just appended to, according to a meta-analytic correspondence study.
A few mapping points are worth holding onto:
- HEXACO Honesty-Humility has no direct Big Five counterpart; its content is partly scattered across Big Five Agreeableness and Conscientiousness.
- HEXACO Agreeableness and Emotionality divide content that the Big Five groups differently between Agreeableness and Neuroticism.
- Some Big Five aspects correspond more closely to specific HEXACO facets than to entire HEXACO domains, so facet-level comparison often beats domain-level comparison, based on research using facet translation methods.
A short example makes this concrete: a HEXACO Agreeableness score reflecting high patience with a difficult coworker doesn't necessarily translate into a high Big Five Agreeableness score, which would more directly reflect warmth and empathy toward that same coworker.
Pro Tip: Never convert a HEXACO domain score directly into a Big Five domain score; check the facet-level content first, since the same label can mean different things in each model.
Measurement and Instruments: Practical Guidance
Instrument choice should follow the research question, not habit. HEXACO-PI-R offers three lengths with different completion times and reliability profiles, while Big Five researchers typically choose between proprietary and public-domain tools.
- The HEXACO-PI-R 60-item form completes in about 12 minutes, suited to screening or time-limited studies.
- The HEXACO-PI-R 100-item form completes in about 20 minutes and is the recommended version for most research applications.
- The HEXACO-PI-R 200-item form supports facet-level reliability work where internal consistency at the facet level is the priority.
- NEO-PI-R is a widely used proprietary Big Five instrument with full facet coverage.
- IPIP markers offer a public-domain alternative, which matters for open science and replication since no licensing fee limits access.
Long forms earn their extra length in facet-level research; short forms make more sense for screening, large-sample surveys, or applied settings where testing time is limited.
What the Evidence Says: Predictive Validity and Meta-Analytic Findings
The two models don't perform identically across outcomes, and the differences are large enough to guide a practical decision. A workplace-deviance meta-analysis found that HEXACO domains explained a notably larger portion of variance in counterproductive work behavior than Big Five domains, with Honesty-Humility standing out as the strongest single correlate, according to Pletzer et al.'s 2019 meta-analysis.
The pattern reverses for other outcomes. A 2023 experience-sampling study with 669 participants found that Big Five measures held a predictive edge over HEXACO for both momentary and stable emotional wellbeing, even though both models contributed unique variance beyond each other.
Two findings worth holding onto:
- HEXACO outperforms for morally relevant and deviance-related outcomes, driven largely by Honesty-Humility.
- Big Five measures often outperform for emotional wellbeing outcomes, though neither model fully substitutes for the other.
A practitioner-focused primer on personality measurement draws the same conclusion: pick the model based on the outcome you're trying to predict, not on a fixed preference for one framework.
How to Choose the Right Model or Measure for Your Project
Selecting between Big Five and HEXACO, or deciding to run both, comes down to a short set of decisions:
- Define your target outcome first. Moral conduct, exploitation, or workplace deviance points toward HEXACO; emotional wellbeing or momentary affect often points toward the Big Five.
- Match measurement length to the reliability you need. Facet-level research calls for longer forms (HEXACO-PI-R 200-item or full NEO-PI-R); screening calls for shorter ones.
- Weigh public-domain options. IPIP markers remove licensing barriers when reproducibility and open access matter to your project.
- Check facets before crosswalking scores between models. Domain-level translation can mislead; facet-level inspection catches where labels diverge in content.
Pro Tip: When your project touches both honesty-related and wellbeing-related outcomes, administering both models (or a facet-level Big Five measure that captures related content) often beats forcing a single-model choice.
A Researcher's Take on Choosing Between the Models
We find that the debate over which model is "better" misses the point: the two frameworks were built to capture different slices of the same personality space. An outcome-led approach, matched to facet-level inspection rather than domain labels alone, consistently produces more defensible conclusions than defaulting to whichever model happens to be more familiar. Readers exploring their own Big Five results can look at facet-level patterns to see where their own honesty-related tendencies already surface within existing Big Five content.
— Steve
Explore Your Own Personality Profile With IQ Career Lab
Our Big Five Personality assessment lets users start without registering and see where their own trait patterns fall across the five domains. Readers who want to look closer at facet-level content, including honesty-related and fairness-related tendencies, can unlock a deeper breakdown through available reports.
- Our Big Five Personality assessment gives you an initial read on your five-domain profile at no cost.
- Our Personality Full Access report ($14.99 one-off, see pricing) adds facet-level detail, letting you inspect the specific traits that overlap with HEXACO-style honesty and fairness content.
- Our facet-level Personality Profile is built for readers who want to go beyond domain scores into the narrower traits that drive them.
Start with the free assessment, then unlock the full facet breakdown through our pricing page when you want the complete picture.
FAQ
Which of these is a Big Five personality factor?
Openness, Conscientiousness, Extraversion, Agreeableness, and Neuroticism are the five factors, often abbreviated OCEAN. Each one is a continuous dimension, meaning people score somewhere along a spectrum rather than falling into a fixed type, as described in the Big Five's domain structure.
What is conscientiousness in HEXACO?
Conscientiousness in HEXACO closely resembles its Big Five counterpart, covering organization, diligence, perfectionism, and prudence. It is one of the five domains HEXACO shares in modified form with the Big Five, alongside the model's distinct sixth factor, Honesty-Humility.
What are the Big Five categories?
The five categories are Openness, Conscientiousness, Extraversion, Agreeableness, and Neuroticism, each measured as a continuous trait rather than a category someone either has or lacks. Each domain also breaks down into narrower facets that capture more specific behavioral tendencies.
How do narcissists score on the Big Five?
Narcissism doesn't map onto a single Big Five profile; scores diverge by subtype. Vulnerable narcissism tends to associate with higher Neuroticism, while grandiose narcissism aligns more with agentic traits like high Extraversion, according to a meta-analytic review of narcissism and Big Five traits; trait scores alone can't diagnose a personality disorder.
Sources
- Hexaco
- Pletzer et al. 2019 — Meta-analysis comparing Big Five and HEXACO for workplace deviance
- 2023 experience-sampling study comparing Big Five and HEXACO for wellbeing