The science behind your style.
Prostile is built on the Big Five — the most widely studied and validated framework in modern personality science.
The Big Five (often abbreviated OCEAN) describes personality along five broad dimensions. Decades of research across cultures and languages keep arriving at roughly the same five, which is why it's the model researchers reach for first.
Prostile measures all five and shows where you land on each — not as a label or a "type", but as a position on a spectrum.
The five dimensions
- Openness imagination, curiosity, and openness to new ideas versus a preference for the concrete, practical, and familiar.
- Conscientiousness organization, planning, and follow-through versus flexibility and spontaneity.
- Extraversion drawing energy from people and activity versus from quieter, more focused settings.
- Agreeableness warmth, cooperation, and trust versus candor, competitiveness, and skepticism.
- Emotional Stability staying calm and even under pressure versus feeling things intensely and staying alert to risk. (The instrument measures Neuroticism; Prostile presents the positive pole so a high score reads as a strength.)
The instrument
Prostile uses a 50-item public-domain instrument from the International Personality Item Pool (IPIP) — a free, peer-developed pool of personality items widely used in research. Each trait is measured by ten short statements; some are reverse-keyed so that simply agreeing with everything doesn't skew your result. Your score on a trait is how your answers sum across its ten items, rescaled to an easy-to-read 0–100.
What the scores mean — and don't
Personality traits are tendencies, not boxes. A high or low score describes where you lean on average, not what you'll do in any given moment, and there's no "good" or "bad" end of any trait — each pole has real strengths.
Prostile is a tool for self-reflection and conversation. It is not a clinical, diagnostic, or hiring instrument, and it shouldn't be used to screen, rank, or make decisions about people. If you take it twice, expect small movement — that's normal measurement, not a personality change.