Big Five Personality
Research-grade· IPIP-50 (Goldberg)
n = 963 · 50 items · 5 scales
0.81
Good
mean α
- Extraversion
- 0.84
- Neuroticism
- 0.83
- Agreeableness
- 0.82
- Openness
- 0.81
- Conscientiousness
- 0.74
First-party reliability
How solid is each test?
Reliability is the first number an I/O psychologist checks. This is Cronbach’s alpha — internal consistency — computed from 2,973 completed JobCannon results, not a textbook figure or a marketing claim.
Strongest so far:Big Five Personalityα = 0.81over 963 takers
IQ Test
Research-grade· General cognitive aptitude
n = 2,010 · 20 items · 4 scales
0.66
Developing
mean α
- Pattern Recognition
- 0.49
- Numerical Reasoning
- 0.39
- Verbal Reasoning
- 0.38
- Logical Reasoning
- 0.31
- Overall
- 0.66
Reading the number
Cronbach’s alpha measures how consistently the items on a scale move together — whether the questions are really measuring one thing. By the standard bands: α ≥ 0.70 is acceptable, ≥ 0.80 good, and ≥ 0.90 excellent for a research or self-discovery instrument.
Every figure here is computed straight from real answer vectors using the exact same item-to-scale scoring as the live test — no hand-entered numbers. A test only appears once it has at least 100 completed results, so more tests join this page as volume grows. We never publish reliability for for-fun quizzes, even when an alpha could be computed.
Ability tests (like the cognitive test) are split into their subscales so you can see each domain honestly; short subscales naturally carry lower alpha than the full composite. Recomputed monthly. Last pulled 2026-06-16.