What the word actually means
Psychometric is built from two Greek roots: psycho meaning mind and metric meaning measurement. The literal translation is measurement of the mind. In a hiring context, it refers to any standardized test that measures cognitive or behavioral traits.
The word is used interchangeably with aptitude test in some contexts and distinctly from it in others. UK firms tend to use psychometric as the umbrella term while US firms tend to use pre-employment test. The tests themselves are the same.
The cognitive side
Cognitive psychometric tests measure general mental ability through numerical, verbal, abstract, spatial, and logical reasoning. The major vendors are CCAT, Wonderlic, PI Cognitive, SHL Verify, Watson-Glaser, and Raven's Progressive Matrices. Most tests mix three or more reasoning types within a single session.
What distinguishes cognitive psychometric tests from standardized academic tests like the SAT is the short time window. Most cognitive psychometric tests are designed so that fewer than 10 percent of candidates finish. That is the point. Speed under pressure is part of what the test measures.
The personality side
Personality psychometric tests measure behavioral traits rather than cognitive ability. The dominant models are the Big Five (openness, conscientiousness, extraversion, agreeableness, neuroticism), DISC, Hogan Personality Inventory, and the 16PF. MBTI-adjacent instruments are also used, though research-backed vendors usually avoid MBTI directly due to validity concerns.
These tests do not have right and wrong answers in the way cognitive tests do. Employers use the results to understand fit for specific roles or team compositions. A salesperson and an engineer look very different on most personality profiles, and employers optimize for that.
How results are used
Cognitive results gate candidates. Below the cutoff, your application ends. Above it, you move forward. This is a binary decision point for most employers.
Personality results inform cultural fit and team placement. A candidate who passes cognitive screening may still be rejected based on personality fit, though this is less common than cognitive-based rejection. Personality profiles sometimes also determine which of several similar roles a candidate is offered.
Are psychometric tests scientifically valid?
Cognitive psychometric tests are among the most rigorously validated assessments in applied psychology. Meta-analyses consistently show cognitive ability as the single most predictive hiring instrument, with validity coefficients around 0.51 for overall job performance.
Personality tests have mixed validity that depends heavily on the specific instrument and the match between the trait measured and the role. Conscientiousness in particular shows solid predictive validity across many roles. Other traits have narrower applicability.
Poorly designed personality tests, such as those based on informal type systems rather than validated trait models, have weak predictive validity and frequently fail to replicate across studies. This is why reputable employers stick to validated instruments and why Myers-Briggs is less common in serious hiring than popular reputation suggests.
Can I fake a personality test?
You can try. It usually backfires. Most validated personality tests include lie detection scales, sometimes called social desirability scales or inconsistency indices, that detect when candidates systematically answer in ways designed to please rather than describe themselves honestly. Flagging on these scales gets scores discounted or triggers a retest.
The better approach is to answer honestly and let the fit emerge. If the role genuinely does not fit your personality, the employer doing the hiring has data that suggests you will not enjoy the role. That is information you also benefit from.
Do psychometric tests replace interviews?
No. Psychometric tests complement interviews rather than replacing them. Interviews are good at assessing communication skills, role-specific knowledge, and cultural fit nuances that standardized tests cannot capture. Psychometric tests are good at efficiently filtering large applicant pools and providing standardized data on cognitive ability and personality traits.
Most modern hiring processes use both. The test comes first as a filter, the interview comes later as a deep dive.