Openness vs intellect: the two sides of the fifth factor

Why does the fifth Big Five factor have two names?

Of the five broad dimensions, this one has never settled on a single name. It appears as Openness to Experience, as Openness or Intellect, and sometimes with Intellect written as though it were its own dimension. The disagreement is not really about labels: the fifth factor gathers two things that travel together often enough to count as one dimension, and separately enough that one word never covered both.

The wider Big Five taxonomy took decades of lexical work to settle, surviving repeated attempts by critics to replace it (Goldberg, 1993). The fifth factor was the slowest to find agreement on a name, because it holds an artistic and sensory side alongside a reasoning and idea-driven side, and researchers who started from one side named the whole dimension after it.

What are the two aspects, Intellect and Openness?

The clearest answer sits between the broad dimension and its narrow facets, at a level called an aspect. When researchers factor-analysed 75 facet scales from two major Big Five inventories, each of the five domains split into two correlated aspects rather than one general factor, ten aspects in all (DeYoung et al., 2007). The two aspects beneath the fifth domain are named Intellect and Openness, and the ten aspects lined up closely with ten genetic factors from earlier work on personality facets, evidence the split is not only a statistical convenience (DeYoung et al., 2007).

Intellect covers the idea-driven half: reasoning, abstraction and enjoying a hard problem for its own sake. Openness covers the aesthetic half: imagination, sensitivity to art and beauty, and an active inner life. The two are correlated, most people high on one are somewhat high on the other, but distinct enough that plenty of people sit clearly higher on one. Someone absorbed in mathematics who finds poetry beside the point is high on Intellect and only moderate on Openness. Someone who reads novels for pleasure and finds a formal proof exhausting is the reverse.

How does each aspect relate to ability and interests?

Intellect invites the question the everyday word always invites: whether this is about ability. The honest answer is that personality, intelligence and vocational interests overlap rather than sitting in separate boxes, and a review of the evidence proposed four trait complexes cutting across the three domains: social, clerical or conventional, science or maths, and intellectual or cultural (Ackerman & Heggestad, 1997). Intellect reads most naturally onto that last complex.

The same review draws a useful distinction. Intelligence tests measure what a person can do at their best, maximal performance. Personality measures, including Intellect and Openness, describe what a person typically reaches for when nobody is asking for their best, typical performance (Ackerman & Heggestad, 1997). A high Intellect score says a person tends to reach for ideas and reasoning, and nothing about how well they reason once they get there.

What does the evidence say about creativity?

Creativity is where the two aspects are often assumed to divide neatly, artistic imagination on the Openness side and inventive reasoning on the Intellect side. The evidence does not draw the line that cleanly. A meta-analysis comparing more and less creative people in science and in art found openness the trait distinguishing them most consistently in both fields, alongside lower conscientiousness and conventionality and higher self-confidence, drive and impulsivity (Feist, 1998). The same pattern told scientists and artists apart from their less creative peers, which argues against sorting scientific creativity under Intellect and artistic creativity under Openness.

Read plainly, the finding is about the broad dimension, not a clean split. Intellect and Openness are correlated halves of one dimension, and creative achievement seems to draw on both.

How do the Openness facets divide between the two aspects?

Facets are the narrowest level most inventories try to measure, and the fifth domain's facets sort fairly naturally under one aspect or the other, even though most inventories were not built with the aspect split in mind. The NEO inventories divide the domain into six facets (Costa & McCrae, 1992); reading down that kind of list, some lean toward reasoning and ideas and others toward imagination and aesthetic feeling.

Wellington reports 13 traits beneath Openness to Experience with the membership. The table below sorts them by which aspect each reads closer to, as a reading rather than an official split: Wellington scores the facets and the domain, not Intellect and Openness as separate totals, the way the ten Big Five aspects are described.

Trait Intellect is named directly after its aspect. The facets on the Openness side match what most people picture when they imagine someone open-minded: moved by art, quick with an image, restless for a new place. What is Openness to Experience? sets out the whole domain these thirteen facets sit beneath.

How does Wellington measure this?

Wellington is a science-based personality assessment from Therabot Labs LLC. It measures personality as continuous traits, built on the Big Five and HEXACO models, and writes the results back as a personal report rather than a type.

The free Snapshot is 60 questions, about 7 minutes, across six dimensions: Extraversion, Agreeableness, Conscientiousness, Emotional Stability, Openness to Experience, Honesty-Humility. It reports Openness to Experience as one dimension, not its two aspects or facets. The first ten questions are answered before anything is asked; after question ten you sign in with an email address so answers are saved and results can be shown. There is no card.

Every trait is reported as a percentile against the reference sample. The three bands (Quiet below the 30th percentile, Balanced to the 70th, High above) and the Portrait names exist to make the result easier to talk about; the percentile is the measurement, and it is always shown alongside. Norms are provisional until the norming sample is complete.

The Wellington Membership, $4.99 a month, adds the Portrait, 336 questions across 4 chapters, reaching 90 traits, including every Big Five facet and all 24 VIA character strengths, so the 13 Openness facets above are each reported individually, though not labelled by aspect, then adds a weekly module over 104 weeks toward all 255 traits, with retests in year two.

Wellington is a wellness tool for reflection, not a medical or psychological diagnosis, and it does not replace care from a qualified professional. It is not built for hiring, and you can export or delete your data at any time.

Questions people ask

Is Intellect the same thing as intelligence?

No. Intelligence tests measure maximal performance, what a person can do at their best on a set task. Intellect, as a personality aspect, is a self-reported preference for ideas, abstraction and hard problems, a description of typical performance instead (Ackerman & Heggestad, 1997). The two are related but measured in entirely different ways.

Are the Intellect and Openness aspects independent of each other?

No, they are correlated rather than independent. Analysing the facets inside each Big Five domain produces two distinct groupings rather than one, and the fifth domain's two groupings are named Intellect and Openness (DeYoung et al., 2007). Someone high on one is usually somewhat high on the other, but not always, which is why the two-aspect view adds information a single score can miss.

Does Wellington score Intellect and Openness as separate aspects?

Wellington reports Openness to Experience as a broad dimension in the free Snapshot, and its individual facets, including Trait Intellect and twelve others, with the membership. It does not publish a separate Intellect aspect score and an Openness aspect score the way this article's table groups the facets, offered here as a reading rather than a Wellington scoring category.

Which aspect does creativity belong to, Intellect or Openness?

Neither cleanly. A meta-analysis of personality and creative achievement in science and art found openness the most consistent trait distinguishing more creative people from less creative ones in both fields, alongside lower conscientiousness and higher self-confidence, drive and impulsivity (Feist, 1998). The same pattern held for scientists and artists alike.