Big Five Personality Test (IPIP-50)
A professional-grade implementation of the Five Factor Model (IPIP-50). Features trait-based scoring, percentile normalization, radar chart visualization, and session persistence.
Discover Your Psychological DNA
This assessment consists of 50 questions from the International Personality Item Pool. It measures the five fundamental dimensions of personality.
- Estimated time: 5-8 minutes
- Answer honestly, even if you don't like the answer.
- Describe yourself as you are now, not as you wish to be.
Trait Profile (Percentiles)
About
The Big Five Personality Traits model (or Five Factor Model) is the gold standard in modern psychology for assessing personality. Unlike binary tests that label you as one "type" or another, the Big Five measures your position on a spectrum for five distinct dimensions: Openness, Conscientiousness, Extraversion, Agreeableness, and Neuroticism (often acronymized as OCEAN).
This tool utilizes the IPIP-50 (International Personality Item Pool), a scientifically validated 50-item inventory. It calculates your raw score, adjusts for reverse-keyed items, and normalizes your results against population statistics to provide a Percentile rank. This reveals not just how you see yourself, but how your traits compare to the general population average.
Why accuracy matters: Precision in personality testing is critical for self-development, career alignment, and understanding interpersonal dynamics. This implementation uses rigorous scoring logic, including standard deviation normalization, to ensure the results are statistically meaningful rather than arbitrary.
Formulas
The scoring algorithm first aligns all responses to a unified direction. For standard items, the score is taken directly. For reverse-keyed items (indicated by k = -1), the score is inverted regarding the 5-point Likert scale:
Total raw scores for each trait (T) are summed. To generate the percentile, we calculate the Z-score using population Mean (μ) and Standard Deviation (σ):
Z = T - μσ
Finally, the percentile (P) is derived via the Cumulative Distribution Function (CDF) of the standard normal distribution:
P = 12 [ 1 + erf Z√2 ]
Reference Data
| Trait (OCEAN) | High Score Description | Low Score Description | Key Facets |
|---|---|---|---|
| Openness | Creative, curious, appreciative of art, open to new ideas. | Practical, conventional, prefers routine, concrete-minded. | Imagination, Artistic Interests, Emotionality, Adventurousness, Intellect, Liberalism |
| Conscientiousness | Organized, dependable, disciplined, achievement-oriented. | Spontaneous, disorganized, careless, impulsive. | Self-Efficacy, Orderliness, Dutifulness, Achievement-Striving, Self-Discipline, Cautiousness |
| Extraversion | Sociable, energetic, assertive, seeks stimulation. | Reserved, solitary, quiet, deliberate. | Friendliness, Gregariousness, Assertiveness, Activity Level, Excitement-Seeking, Cheerfulness |
| Agreeableness | Compassionate, cooperative, trusting, helpful. | Critical, analytical, competitive, skeptical. | Trust, Morality, Altruism, Cooperation, Modesty, Sympathy |
| Neuroticism | Sensitive, anxious, prone to negative emotions. | Resilient, calm, emotionally stable, confident. | Anxiety, Anger, Depression, Self-Consciousness, Immoderation, Vulnerability |