Take a validated Big Five measure
Use a psychometrically validated instrument — not a viral quiz — to get a reliable trait profile.
Key takeaways
- What it is: Use a psychometrically validated instrument — not a viral quiz — to get a reliable trait profile.
- Why it works: Most popular personality tests conflate type categories (MBTI) with trait dimensions, or use face-valid items that measure self-concept rather than behavior. Validated Big Five measures use items that have been tested for reliability and construct validity, meaning they measure what they claim to measure and produce stable scores over time. An accurate starting profile is the prerequisite for applying any of the downstream practices.
- Evidence: Backed by observational / correlational evidence.
- Avoid: Treating the scores as fixed destiny rather than as a statistical description of current tendencies — Big Five scores are heritable and relatively stable but do show meaningful change across adulthood and in response to deliberate behavioral practice.
Why it works
Most popular personality tests conflate type categories (MBTI) with trait dimensions, or use face-valid items that measure self-concept rather than behavior. Validated Big Five measures use items that have been tested for reliability and construct validity, meaning they measure what they claim to measure and produce stable scores over time. An accurate starting profile is the prerequisite for applying any of the downstream practices.
How to do it
- 1Use the IPIP Big Five (publicly available at ipip.ori.org) or another validated measure — not a social-media quiz or BuzzFeed-style test.
- 2Complete it honestly based on your actual typical behavior, not your ideal or your worst-day behavior.
- 3Read the dimensional scores (percentiles relative to a large reference sample) rather than categorical labels.
- 4Note the two or three traits where you score most extreme — high or low — since those are your sharpest behavioral tendencies.
What the evidence says
ObservationalBig Five traits are among the most reliably measured constructs in personality psychology, with strong test-retest reliability and cross-cultural validation across decades of research.
Honest caveat: Self-report measures capture self-perception rather than behavior directly; observer ratings from people who know you well often provide a more accurate profile than self-report alone.
- — John & Srivastava (1999), The Big Five trait taxonomy, in Handbook of Personality: Theory and Research
- — McCrae & Costa (1987), validation of the five-factor model across instruments and observers, Journal of Personality and Social Psychology
Common mistake
Treating the scores as fixed destiny rather than as a statistical description of current tendencies — Big Five scores are heritable and relatively stable but do show meaningful change across adulthood and in response to deliberate behavioral practice.
IX Coach uses your Big Five profile as a calibration input for coaching style and goal-setting — a low conscientiousness score calls for different system design than a high one, and IX Coach adjusts accordingly.
Practice this with IX Coach →