The Big Five has been personality psychology’s most trusted framework for decades — the model researchers reach for when they want something more empirically grounded than MBTI or other typologies. A study published in the European Journal of Personality in 2026 now argues that even the Big Five may be incomplete. Using a large dataset and a newer statistical method, researchers identified six trait domains instead of five, organized under three broader “meta-traits” — and found no evidence of a single overarching personality factor some theorists have proposed sits above everything else.
What the Study Actually Did
Researchers reanalyzed data from the IPIP-NEO, one of the most widely used personality inventories built on the Big Five model, using a technique called taxonomic graph analysis. Rather than assuming the five-factor structure in advance and testing how well the data fit it, this method lets the statistical structure of the data itself suggest how traits cluster together — closer to letting the data draw its own map than starting with a map and checking if the data fits inside it.
The dataset was large: roughly 150,000 participants who had completed the 300-item IPIP-NEO questionnaire. Analyzing responses at that scale gave the researchers enough statistical power to detect structure that might not show up reliably in smaller, more typical personality studies.
Three Layers Instead of One Flat List
Instead of a single list of five traits, the new structure has three layers: 28 narrow facets at the bottom, six broader trait domains organized above those facets, and three overarching “meta-traits” above that. Of the six trait domains, three map onto familiar Big Five territory — neuroticism, conscientiousness, and openness came through largely intact. The other three are new splits: sociability, integrity, and impulsivity, which appear to carve up territory that used to be bundled together under extraversion and agreeableness into more specific, more statistically distinct pieces.
The three meta-traits sitting above all of this are stability, plasticity, and a newly proposed third dimension called disinhibition. Stability and plasticity have shown up in prior personality research as broad umbrella factors; disinhibition emerging as a separate meta-trait, distinct from the other two, is the more novel part of the finding.
Why “No General Factor” Is the More Interesting Finding
For years, some personality researchers have debated whether there’s a single “General Factor of Personality” sitting above even the Big Five — essentially one dimension capturing overall psychological adjustment or social desirability that all other traits load onto. It’s a contested idea, and this study’s large-scale analysis found no statistical evidence to support it. That matters because it pushes back against the idea that personality can be meaningfully boiled down to one super-trait, reinforcing that personality is genuinely multidimensional rather than one axis dressed up in five costumes.
What This Means for the Big Five’s Status
It’s worth being precise about what this study does and doesn’t claim. It isn’t arguing that the Big Five was wrong, exactly — three of its five traits (neuroticism, conscientiousness, openness) held up well in this new analysis. What it argues is that the other two, extraversion and agreeableness, may have been doing double or triple duty, bundling together narrower traits that behave somewhat independently of each other once you have enough data to tell them apart. Sociability, integrity, and impulsivity may be better thought of as three separate dials rather than two.
This is a fairly normal pattern in how psychological models mature. Other recent research has made a similar point from a different angle — that single broad traits like conscientiousness predict real-world outcomes like job performance only up to a point, and that the narrower facets underneath a broad trait often carry information the broad trait alone misses. A six-domain, three-layer model is a more complicated picture, but complexity isn’t the same as being wrong — it may simply be a more accurate reflection of how differentiated personality actually is.
Should This Change How You Think About Personality Tests?
Not drastically, at least not yet. A single large study, even a well-powered one, doesn’t immediately replace a model with 60-plus years of accumulated research behind it. Big Five-based assessments remain well-validated for predicting a wide range of outcomes, from job performance to relationship satisfaction to physical health, and that track record doesn’t disappear because a newer statistical technique surfaced additional structure in the data.
What’s more likely is a gradual refinement rather than a replacement — future assessments might increasingly report scores at the facet or six-trait level rather than collapsing everything into five broad buckets, giving a more granular picture without discarding what already works. For now, the practical takeaway is less “the Big Five is obsolete” and more “personality is probably more finely structured than five numbers can fully capture,” which is a reasonable thing to keep in mind the next time a five-trait score feels like it’s missing something about you that a single number can’t quite explain.
Frequently Asked Questions
Does this study mean the Big Five is wrong?
Not wrong, but possibly incomplete. Three of the five traits held up well in this analysis; the other two, extraversion and agreeableness, appear to split into narrower components when examined with this method on a large dataset.
What are the three new meta-traits?
Stability and plasticity, which have appeared in earlier personality research as broad umbrella dimensions, plus a newly identified third meta-trait called disinhibition, which emerged as statistically distinct in this analysis.
Will personality tests change because of this research?
Possibly, over time. Established Big Five-based tests remain well-validated and widely used. A shift toward six-trait or facet-level reporting would likely happen gradually as the research is replicated, rather than as an immediate overhaul.
What does “no general factor of personality” mean?
Some researchers have proposed that a single overarching dimension sits above all other personality traits, capturing something like general adjustment. This study found no statistical support for that idea, reinforcing that personality is multidimensional rather than reducible to one factor.
Personality models are not static, and this study is a reminder that even a framework as established as the Big Five is still being tested, refined, and occasionally expanded as better data and methods become available. Whether the field eventually settles on five, six, or some other number of core traits, the underlying goal stays the same: describing the genuine complexity of how people differ from one another without oversimplifying it into something tidier than it really is.
