The IPIP-NEO Personality Inventory is a comprehensive, public-domain measure of the Five Factor Model of personality — the most widely researched framework for describing personality traits, spanning Neuroticism, Extraversion, Openness, Agreeableness, and Conscientiousness. Each of these five broad domains is broken down into six narrower facets (30 in total, from Anxiety and Assertiveness to Orderliness and Achievement-Striving), so instead of a single personality label you receive a detailed profile with a separate score for each of the 30 facets. Taking it gives you a fine-grained picture of how you tend to think, feel, and behave across dozens of specific everyday tendencies — not just whether you lean introverted or extroverted, but exactly which parts of that trait, such as sociability, assertiveness, or excitement-seeking, are most and least like you.
Instrument Specifications
Target Population
Adults
Administration Format
Self-Administered
Intended Domain / Purpose
Research & Empirical Study
Recommended Age Bracket
18+
Duration & Pacing
35 Minutes (Self-Paced)
Access License
Open Creative Commons
Academic Citation & Instrument Provenance
When referencing this instrument in research, academic theses, or clinical institutional audits, please cite the original author publication:
License: Public Domain (International Personality Item Pool, ipip.ori.org). Citation: Goldberg, L. R. (1999). A broad-bandwidth, public-domain, personality inventory measuring the lower-level facets of several five-factor models. In I. Mervielde, I. Deary, F. De Fruyt, & F. Ostendorf (Eds.), Personality Psychology in Europe (Vol. 7, pp. 7-28). Tilburg University Press. This is not a diagnostic tool. Facet scores reflect this test's own item pool only — they are not compared against a published clinical or population norm; no such norm has been entered for this instrument.
Governance, Boundaries & Ethical Use
Construct Boundaries & Interpretive Limitations
This is a lengthy 300-item self-report inventory. Results reflect how you currently see yourself, not an objective or clinical evaluation of personality, and can be influenced by mood, self-awareness, and the context in which you take it.
License: Public Domain (International Personality Item Pool, ipip.ori.org). Citation: Goldberg, L. R. (1999). A broad-bandwidth, public-domain, personality inventory measuring the lower-level facets of several five-factor models. In I. Mervielde, I. Deary, F. De Fruyt, & F. Ostendorf (Eds.), Personality Psychology in Europe (Vol. 7, pp. 7-28). Tilburg University Press. This is not a diagnostic tool. Facet scores reflect this test's own item pool only — they are not compared against a published clinical or population norm; no such norm has been entered for this instrument.
