Personality tests in hiring: what they can and cannot tell an employer

What can a personality test tell an employer?

Employers who use a personality test are almost always scoring the Big Five, sometimes under a different name. Two findings carry most of the weight. Conscientiousness, the trait behind planning, reliability and follow-through, relates to job performance across every occupational group studied, from professionals and police officers to managers and skilled workers (Barrick & Mount, 1991). Extraversion is the most consistent trait correlate of leadership, in both who emerges as a leader and how well they lead once in the role (Judge et al., 2002).

Job satisfaction follows a related pattern. People lower in Neuroticism and higher in Extraversion and Conscientiousness report more satisfaction with their work, while Openness makes almost no difference (Judge, Heller & Mount, 2002). None of these findings names an occupation or ranks two candidates. They describe how a large group tends to behave, on average, which is different from what an employer needs to decide about one person. Career personality tests covers the interest side of the picture; this page is about the trait side.

Why are the correlations too weak for one hiring decision?

Where these relationships have been quantified, they sit near .3: Extraversion correlates .31 with leadership and Conscientiousness .28 (Judge et al., 2002), and Neuroticism sits at -.29 and Extraversion at .25 for job satisfaction (Judge, Heller & Mount, 2002). A correlation of that size means the trait explains a modest share of the difference in outcomes and leaves most of it unexplained. Two people with the same Conscientiousness score can perform very differently in the same role, and two with different scores can perform the same. That is normal for a real but moderate effect, and it is the property that breaks down when a group-level finding is applied to one candidate.

A test validated across thousands of people, averaged over many jobs, was never built to separate two named applicants. Score bands sit close together near the middle of the distribution, where most people land, and a candidate near a boundary can read differently on a retake without having changed. The Big Five and your career goes through what a trait profile is good for once the stakes are lower than hiring.

Can you fail a personality test, or answer it strategically?

No. A personality questionnaire has no right or wrong answers, only a description of tendencies, so there is nothing to pass or fail. The only strategy worth using is to answer honestly and consistently, because a profile built from answers chosen to match a job looks unusual to whoever scores it and tells nobody, including the candidate, anything true.

Self-report has real limits here. People are the best judges of their own low-visibility states, such as how anxious or emotionally steady they tend to feel, but people who know them well judge more evaluative traits, such as how capable someone seems, more accurately than the person does themselves (Vazire, 2010). That matters for hiring, because observer ratings from people who know a candidate predict job performance and academic achievement about as well as self-ratings, and better for some outcomes (Connelly & Ones, 2010). A self-report questionnaire filled in by a stranger stands in for a judgement a colleague would often make better. Personality test questions has more on this kind of item.

Why are type indicators a poor basis for hiring decisions?

Some pre-employment tests still sort candidates into named types rather than reporting a trait score. That format has been examined directly for the best-known instrument of this kind, and the verdict is a caution: its four-letter formula does not support the inferences commonly drawn from it, and considerable care is warranted before using it to make decisions in a workplace setting (Pittenger, 2005).

The problem is structural, not a flaw in one test. Sorting a continuous score into a small number of boxes throws away information near the boundary, and a candidate close to a cut-off can land in a different box on a retake without any real change in them. A box is easier to talk about than a percentile, but it is a weaker foundation for a decision that affects someone's livelihood.

What can and cannot a hiring test tell an employer?

Here is the line between what a personality score can support and what it cannot.

• Read a result as a hypothesis to test in conversation, not a verdict.
• Weigh it alongside work samples and structured interviews, never alone.

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, and scores six dimensions: Extraversion, Agreeableness, Conscientiousness, Emotional Stability, Openness to Experience, Honesty-Humility. The first ten questions are answered before anything is asked of you; after question ten you sign in with an email so your answers are saved and your results can be shown. There is no card. The Wellington Membership, $4.99 a month, adds the Portrait, 336 questions across 4 chapters, to reach 90 traits, including every Big Five facet and all 24 VIA character strengths, then continues toward all 255 traits.

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 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.

Wellington is a self-understanding tool, built for the person taking it rather than an employer reading the result. 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 designed for hiring, selection or promotion, and we do not offer it for that use. You can export or delete your data at any time.

Questions people ask

Can you fail a personality test?

No. A personality test used in hiring describes tendencies rather than right and wrong answers, so there is no passing or failing score. The only approach worth taking is to answer honestly and consistently, since a profile built from guessed-at answers describes a person who does not exist, which helps nobody, including the candidate.

Do personality tests predict who will perform well in a job?

Partly. Conscientiousness relates to job performance across occupations (Barrick & Mount, 1991), and Extraversion is the strongest trait correlate of leadership (Judge et al., 2002). Both relationships are real and moderate, enough to describe a group but not to rank two candidates against each other with any precision.

Can a personality test used in hiring be faked?

It can be answered strategically, but doing so works against the candidate as much as the employer. Self-report captures a person's own view of low-visibility traits well, while people who know them judge evaluative traits more accurately (Vazire, 2010), and observer judgements predict job performance about as well as self-ratings, and better for some outcomes (Connelly & Ones, 2010). Answering honestly gives the more useful picture.

Is a four-letter type result a good basis for a hiring decision?

Not on the evidence. The best-studied type instrument's four-letter formula does not support the inferences commonly drawn from it, and caution is warranted before using it to guide workplace decisions (Pittenger, 2005). A continuous trait score keeps more information than a type label.

Is Wellington intended for use in hiring?

No. Wellington is built for the person taking it, to support self-understanding rather than an employer's decision, and we do not offer it for hiring, selection or promotion.