Should You Use Personality Tests for Hiring?
Short Answer
Yes, when used correctly. Big Five Conscientiousness predicts job performance across all roles (r=0.22). DISC predicts team communication fit. EQ predicts leadership effectiveness. But: never use as sole criterion, apply consistently to all candidates, and focus on job-relevant traits only.
Full Answer
Personality tests in hiring are both scientifically supported and commonly misused. Here's the balanced view.
The science supports it: Meta-analysis by Barrick & Mount (1991, 117 studies) found Big Five Conscientiousness predicts job performance at r=0.22 across all occupations. For specific roles, other traits matter: Extraversion predicts sales (r=0.15), Agreeableness predicts customer service, Openness predicts creative roles.
How to use correctly: 1) Define required traits BEFORE seeing candidates. 2) Use validated instruments (Big Five, DISC — not BuzzFeed quizzes). 3) Apply consistently to ALL candidates. 4) Weight at 20-30% of the decision — alongside interviews, skills tests, and references. 5) Focus on job-relevant traits only — don't penalize introversion for a coding role.
How NOT to use: As sole hiring criterion, to discriminate against protected groups, with unvalidated tests, or to screen out "bad" personality types (there are no bad types — only poor fits for specific roles).
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Is it legal to use personality tests for hiring?▼
Yes, in most jurisdictions, when: tests are validated, applied consistently, don't discriminate against protected groups, and used as one input among many. In the UK: comply with Equality Act 2010. In the US: comply with ADA and EEOC guidelines. Avoid tests that ask about medical conditions or disabilities.
Which personality test is best for hiring?▼
Big Five is the gold standard (strongest validity evidence). DISC is great for team-fit assessment. EQ predicts leadership effectiveness. RIASEC predicts job-interest alignment. Use Big Five as your primary hiring assessment, add DISC for team roles and EQ for leadership positions.