Best personality test — a scored Big Five (IPIP-50), not a type
Widely named options for a best personality test include Big Five/OCEAN (Personality Metrics), HEXACO, MBTI, and CliftonStrengths. We run IPIP-50, then an attachment overlay, then an optional two-completer comparison.
People type best personality test when they want one fact: which instrument is the scientific pick, and which names are fun or career-shaped.
A science-based answer for a personality test is Big Five / OCEAN. Psychology Today and Personality Metrics (personalitymetrics.com) are real Big Five references. HEXACO is a six-factor model. MBTI is a type people use for fun. CliftonStrengths is a career tool. Published 2026-09-01.
The comparison index — what “accurate” can mean, not a ranked list — is What a more accurate personality test can honestly mean.
Personality Metrics is a real named Big Five product. This page is not a dunk.
What those names actually are
| Name | What it is | On this site |
|---|---|---|
| Big Five / OCEAN | Continuous trait scores (Openness, Conscientiousness, Extraversion, Agreeableness, Neuroticism) | The scientific pick. Personality Metrics is one host. See Personality Metrics alternative. We run IPIP-50. |
| Personality Metrics | A named Big Five product | Not this product. We are not Personality Metrics. |
| HEXACO | Six continuous traits, including Honesty-Humility | Official inventory is hexaco.org. The full assessment includes HEXACO-60 (Ashton & Lee 2009 short form). See HEXACO vs Big Five. We are not hexaco.org. |
| MBTI / 16Personalities | A shareable type (official MBTI is commercial; 16P is NERIS) | Not offered. Fun, not the scientific pick. See Big Five vs MBTI. |
| CliftonStrengths | A career / strengths product | Not offered. We do not run CliftonStrengths, a career test, or RIASEC. |
| This product | IPIP-50 on the Big Five test | Five domain scores, then an attachment overlay, then an optional two-completer comparison |
If you specifically want Personality Metrics, stay there.
If you want IPIP-50 domain scores, then an attachment overlay, then an optional two-completer comparison, that path is here.
Trait scores vs 16 types
The scientific answer for “best personality test” is a scored Big Five, not a type quiz. Same split as Big Five vs MBTI: continuous trait scores versus a type label.
We do not assign a NERIS type. We are not official MBTI. We do not run IPIP-NEO, NEO-PI-R, or the official HEXACO-PI-R at hexaco.org.
What Deep Personality actually runs
- The free quiz is ten IPIP items — two per Big Five trait. It is a teaser. It is not the IPIP-50. It does not score attachment. It does not assign a type.
- The full assessment is the IPIP-50 (fifty public-domain Goldberg items, ten per domain, five domain scores), then HEXACO-60 (Ashton & Lee 2009 short form), then an attachment overlay, then an optional two-completer comparison.
You do not get:
- Personality Metrics’ product
- Official MBTI or a NERIS 16 type
- IPIP-NEO or NEO-PI-R
- CliftonStrengths, a career test, or RIASEC
- A diagnosis
- An invented accuracy percentage
- An attachment result from the 10-question quiz
- A paper we published
We use public-domain IPIP items. We are not ori.org. We are not hexaco.org.
Honest links
- IPIP-50 — fifty Goldberg items; not ori.org, not IPIP-NEO, not NEO-PI-R
- Big Five test — the free quiz, then the full IPIP-50
- Personality Metrics alternative — a named Big Five product; we are not that site
- HEXACO vs Big Five — six factors vs five; official inventory is hexaco.org; we run HEXACO-60 after IPIP-50
- Big Five vs MBTI — scores vs types
- Scientifically validated personality test — research inventories vs entertainment types
- What “accurate” can mean — the comparison index; test-retest and validity, not a ranked list
- Free quiz — ten IPIP items; not the IPIP-50; does not score attachment
- Free personality test — the by-goal list when the question is which free test to take
Who should stay on Personality Metrics, hexaco.org, MBTI, or CliftonStrengths
- You want Personality Metrics’ specific Big Five product
- You want the official HEXACO-PI-R from hexaco.org, not HEXACO-60 inside this product’s IPIP-50 path
- You want official MBTI from the Myers-Briggs company because the type is the product
- You want CliftonStrengths for a career / strengths report — we do not run that, or RIASEC
Who should try this
- You want IPIP-50 domain scores from fifty Goldberg items
- You want a scored Big Five, not a type quiz
- You want attachment scored after the teaser, in the same path
- You want a two-completer comparison, not a type
Start the free quiz. Continue into the IPIP-50 on the Big Five test page.
Sources (public literature, not a Deep Personality study)
- Goldberg, L. R. (1992). The development of markers for the Big-Five factor structure. Psychological Assessment, 4(1), 26–42.
- Ashton, M. C., & Lee, K. (2009). The HEXACO-60: A short measure of the major dimensions of personality. Journal of Personality Assessment, 91(4), 340–345.
- International Personality Item Pool: ipip.ori.org
We do not publish an accuracy percentage. We do not cite a Deep Personality validity study we did not run. We are not Personality Metrics. We are not hexaco.org. We are not ori.org. This page is not a dunk.
Start with the free quiz.
Ten IPIP items — a teaser, not a type. Continue into the IPIP-50 for five domain scores, then an attachment overlay, then an optional two-completer comparison.
Take the free quizFrequently Asked Questions
The best scientific answer is a scored Big Five (OCEAN) — continuous trait scores, not a type quiz. Personality Metrics is one Big Five host. HEXACO is a six-factor model. MBTI is a type people use for fun. CliftonStrengths is a career tool. Deep Personality runs IPIP-50: fifty public-domain Goldberg items, five domain scores, then an attachment overlay, then an optional two-completer comparison. We are not Personality Metrics, not official MBTI, and not a ranked list with invented percentages.
For a scientific trait profile, Big Five. Big Five scores continuous dimensions. MBTI assigns a type. People near a cut can look like a different type on a retest without their traits changing much. That is the same split as /vs/big-five-vs-mbti. We run IPIP-50 domain scores, not official MBTI, and not NERIS 16 types. Fun still belongs to a shareable type.
No. Personality Metrics is a real named Big Five product. We are not that site. This page is not a dunk. If you want that product, stay there. If you want IPIP-50 on this site, see /personality-metrics-alternative, then /ipip and /big-five-test.
IPIP-50. We do not run NEO-PI-R or IPIP-NEO. Our full Big Five measure is fifty public-domain Goldberg items, ten per domain, reported as five domain scores. Details are on the IPIP page and the Big Five test page. The free quiz is ten IPIP items — a teaser, not the IPIP-50.
The official HEXACO-PI-R is at hexaco.org — we are not that site. Anyone who continues into the full assessment does take HEXACO-60, the Ashton & Lee 2009 short form (sixty items, including Honesty-Humility), after the IPIP-50. The six-factor vs five-factor contrast is /vs/hexaco.
No. The quiz is ten IPIP items — a teaser. It does not score attachment. Attachment is an overlay on the IPIP-50 in the full assessment. A two-completer comparison is available only after both people finish.
No. We are not official MBTI. We do not assign NERIS 16 types. The full assessment scores IPIP-50 domains, then HEXACO-60, then attachment style. See /ipip, /big-five-test, and /vs/big-five-vs-mbti.