IPIP-NEO Personality Inventory

Scale Overview & Construct

A public-domain 300-item measure of the Five Factor Model of personality across 30 facets.

300-Item Scale Likert Self-Report Dimensional Breakdown Server-Side Validated

Purpose & Measurement Objectives

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.

Frequently Asked Questions

What is the IPIP-NEO Personality Inventory?

A public-domain 300-item measure of the Five Factor Model of personality across 30 facets.

How long does the IPIP-NEO Personality Inventory take?

It takes about 35 minutes to answer all 300 questions. You can go at your own pace.

Is this test free, and is it available in Hindi?

Yes, it is free with a PsiQ account. The questions and answer options are available in English, Hindi and Hinglish.

Can this test diagnose a condition?

No. Online self-report scales are for self-reflection, education and research, not diagnosis. If you are worried about your mental health, please speak to a qualified mental-health professional.