Situational Judgment Test vs Personality Test: What Each Predicts and When to Use Them in Hiring

A situational judgment test (SJT) measures how well someone judges what to do in realistic work scenarios. A personality test measures stable traits that shape how someone tends to behave at work. Both predict job performance, and they work best together because each captures information the other misses.

Current meta-analytic estimates show that work-framed personality scales predict job performance almost as well as SJTs. Personality tests also show much smaller differences between demographic groups. The right choice in the situational judgment test vs personality test decision depends on the role, the stage of hiring and other elements in your process.

What does a situational judgment test measure compared with a personality test?

An SJT presents a realistic work scenario and asks people what they would do, or what they should do, in response. A personality test asks people to describe how they usually think, feel and behave, often with items framed around work. This difference affects how each test predicts performance, how easy it is to fake and how candidates experience it.

An SJT presents a short scenario and asks candidates to choose or rate possible responses. For example: "A customer is angry about a late delivery and asks for a manager. What would be the most effective response?" Research suggests SJTs capture practical knowledge about which behaviors work at the job (Motowidlo & Beier, 2010).

The SJT format can be used to assess many different skills, such as leadership, teamwork or customer service. In practice, interpersonal skills are the most common target, and SJTs predict best when their content matches the performance you care about (Christian, Edwards & Bradley, 2010). How the question is worded also matters:

• Knowledge instructions ("What should you do?") correlate .35 with cognitive ability.
• Behavioral tendency instructions ("What would you do?") correlate .19 with cognitive ability and relate more to personality (McDaniel et al., 2007).

A personality assessment asks people to describe their typical thoughts, feelings and behavior. The most rigorous tools measure the Big Five traits. One validated personality profile can be reused across many roles, while a good SJT is usually built for one job family.

SJT vs personality test: which predicts job performance better?

SJTs and work-framed personality scales predict job performance at almost the same level. General personality items predict slightly less well. The most current estimates come from Sackett, Zhang, Berry and Lievens (2022).

Source: Sackett et al. (2022), Table 3. Validity is the corrected correlation with job performance. d is the average score gap between groups in standard deviation units.

Conscientiousness is the most consistent personality predictor across jobs, a pattern first shown by Barrick and Mount (1991). Its validity rises from .19 to .25 when items ask how people behave at work. That simple design choice puts a single personality scale on par with an SJT. The table above also shows one trait, while a validated personality assessment measures several traits together.

How do SJTs and personality tests compare on faking, fairness and candidate experience?

Can candidates fake them?

Candidates can inflate scores on both. In a meta-analysis of 33 studies, applicants scored higher than non-applicants on conscientiousness and emotional stability (Birkeland et al., 2006). Our guide on whether you can fake a personality test covers the design features that reduce this. Higher scores do not necessarily mean lost prediction. Ones, Viswesvaran and Reiss (1996) found social desirability did not undermine personality scales' validity.

SJT scores can be inflated too. When the same SJT was used for selection rather than development, medical residency applicants scored higher than current residents, a gap the authors treat as a faking effect (Zhang, Cullen & Sackett, 2021).

The good news is that faking can be reduced through design. Forced-choice personality items, carefully written SJT response options and clear warnings to candidates all make it harder to game either test.

Which is fairer across groups?

Personality tests show the smallest group differences. The Black–White gap is .34 to .39 for SJTs and close to zero for conscientiousness (Sackett et al., 2022). SJTs that lean on reading and reasoning tend to carry more of the group differences seen in cognitive tests.

A d value does not by itself tell you whether a test causes adverse impact. That depends on your cut score and applicant pool. Our checklist on whether your hiring assessment is defensible explains what to monitor.

How do candidates react?

Applicants react more positively to methods they see as job-related (Hausknecht, Day & Thomas, 2004). Across 17 countries, they rated work samples and interviews highest and personality inventories in the middle tier (Anderson, Salgado & Hülsheger, 2010). SJTs were not in that study, but their job-like scenarios make their relevance easy for candidates to see.

When should you use an SJT, a personality test, or both?

When weighing a personality test vs situational judgment test for hiring, use the tool that matches the question you need to answer at each stage of hiring. A personality test tells you how someone tends to work. An SJT tells you whether they recognize effective action in the situations your role actually involves.

Use a personality test when:

• You are screening large applicant pools early in the process.
• Fairness across groups is a priority, since personality scales show near-zero group differences.
• You want one measure that also supports onboarding, coaching and development later.

Use an SJT when:

• The role depends on judgment in recurring situations, such as customer escalations or first-line supervision.
• You can invest in job analysis so scenarios reflect real critical incidents.
• You want candidates to see a realistic preview of the job.

Use both when a role needs the right traits and sound judgment. A common sequence is a short personality assessment early, then an SJT for shortlisted candidates. For example, a contact center might screen for conscientiousness and emotional stability, then use an SJT on customer escalations before interviews.

Whatever you choose, check that each tool adds value in your own data. Our article on why SJTs are expanding how we assess talent explains where they fit in a wider strategy.

How do SJTs and personality tests compare with cognitive ability tests?

Cognitive ability tests predict performance at .31 but show the largest group difference, at d = .79 (Sackett et al., 2022). SJTs sit between cognitive and personality tests on both counts. Knowledge-instruction SJTs correlate .35 with cognitive ability, so part of what they measure overlaps with reasoning (McDaniel et al., 2007).

In the SJT vs cognitive ability test comparison, an SJT predicts nearly as well with less than half the group difference. Personality tests add information that neither SJTs nor cognitive tests fully capture. That is why many selection systems combine all three.

Common misconceptions about SJTs and personality tests

• "SJTs can't be faked." SJT scores rise in high-stakes settings, though careful design limits the effect.
• "An SJT can replace a personality test." The two overlap only partly, and each predicts performance the other misses.
• "Use whichever has the highest validity." Validity, fairness, cost and candidate experience all matter, and the best predictor alone rarely beats a well-designed combination.
• "Personality tests are too easy to fake to be useful." Applicants do inflate some scores, but research finds personality scales keep their predictive value, and forced-choice formats reduce inflation.

How Deeper Signals approaches SJTs and personality assessment

We treat SJTs and personality assessment as complementary parts of one selection strategy. Deeper Signals Situational Judgment Tests are video-based and interactive. Candidates watch a realistic scenario unfold, then weigh trade-offs, read data or rank possible actions as they would in the role.

Each SJT is currently built with the client around their roles, starting from a psychologist-led job analysis. Subject matter experts check every scenario for realism, and scoring is designed to be validated against the client's own performance data.

On the same platform, the Core Drivers Diagnostic measures personality across six dimensions based on the Big Five model in under ten minutes. It pairs forced-choice items with behavioral statements, a format designed to make faking harder. Its technical manual reports adverse impact ratios of .80 or above across gender, age and ethnicity.

FAQ

Is a situational judgment test a personality test? No. An SJT measures judgment about effective behavior in specific work scenarios, while a personality test measures broad, stable traits.

Which is more predictive, an SJT or a personality test? They are close. Work-framed conscientiousness items reach .25 and SJTs about .26, while general conscientiousness items reach .19 (Sackett et al., 2022).

Can you use an SJT and a personality test together? Yes. Combining them adds prediction, and many employers use personality early in the process and an SJT later.

Do SJTs have adverse impact? SJTs show moderate group differences, smaller than cognitive tests and larger than personality tests. Whether that becomes adverse impact depends on your cut score and applicant pool.

Last reviewed by Dr. Luke Treglown — October 2026

References

• Anderson, N., Salgado, J. F., & Hülsheger, U. R. (2010). Applicant reactions in selection: Comprehensive meta-analysis into reaction generalization versus situational specificity. International Journal of Selection and Assessment, 18(3), 291–304. https://doi.org/10.1111/j.1468-2389.2010.00512.x
• Barrick, M. R., & Mount, M. K. (1991). The Big Five personality dimensions and job performance: A meta-analysis. Personnel Psychology, 44(1), 1–26.
• Birkeland, S. A., Manson, T. M., Kisamore, J. L., Brannick, M. T., & Smith, M. A. (2006). A meta-analytic investigation of applicant faking on personality measures. International Journal of Selection and Assessment, 14(4), 317–335. https://doi.org/10.1111/j.1468-2389.2006.00354.x
• Christian, M. S., Edwards, B. D., & Bradley, J. C. (2010). Situational judgment tests: Constructs assessed and a meta-analysis of their criterion-related validities. Personnel Psychology, 63(1), 83–117.
• Hausknecht, J. P., Day, D. V., & Thomas, S. C. (2004). Applicant reactions to selection procedures: An updated model and meta-analysis. Personnel Psychology, 57(3), 639–683. https://doi.org/10.1111/j.1744-6570.2004.00003.x
• McDaniel, M. A., Hartman, N. S., Whetzel, D. L., & Grubb, W. L. (2007). Situational judgment tests, response instructions, and validity: A meta-analysis. Personnel Psychology, 60(1), 63–91. https://doi.org/10.1111/j.1744-6570.2007.00065.x
• Motowidlo, S. J., & Beier, M. E. (2010). Differentiating specific job knowledge from implicit trait policies in procedural knowledge measured by a situational judgment test. Journal of Applied Psychology, 95(2), 321–333. https://doi.org/10.1037/a0017975
• Ones, D. S., Viswesvaran, C., & Reiss, A. D. (1996). Role of social desirability in personality testing for personnel selection: The red herring. Journal of Applied Psychology, 81(6), 660–679. https://doi.org/10.1037/0021-9010.81.6.660
• Sackett, P. R., Zhang, C., Berry, C. M., & Lievens, F. (2022). Revisiting meta-analytic estimates of validity in personnel selection: Addressing systematic overcorrection for restriction of range. Journal of Applied Psychology, 107(11), 2040–2068. https://doi.org/10.1037/apl0000994
• Zhang, C., Cullen, M. J., & Sackett, P. R. (2021). Effects of response instructions on situational judgment test performance in operational selection and developmental contexts. International Journal of Selection and Assessment. https://doi.org/10.1111/ijsa.12324