IPIP-NEO-120 Personality Inventory Assessment

Introduction:

Personality researchers group routine patterns of thought, feeling, and behaviour into five broad traits commonly called the Big Five: Openness, Conscientiousness, Extraversion, Agreeableness, and Neuroticism. Each domain summarises six narrower facets, providing a 30-part map of normal adult personality useful in counselling, team building, and evidence-based self-development. The model is backed by decades of cross-cultural validation.

This browser-based inventory presents 120 statements drawn from the International Personality Item Pool. You rate each statement on a five-point accuracy scale. The engine reverse-scores appropriate items, sums responses per trait, and displays domain totals on an interactive radar chart, letting you compare relative strengths across the five traits without exporting data or creating an account.

Use your results to reflect on study habits, tailor career discussions, or open a balanced conversation in coaching sessions; avoid treating the numbers as fixed labels and never diagnose psychological conditions from them. Instead, treat scores as starting points for deeper, context-rich conversations with qualified professionals. Results do not constitute a clinical diagnosis.

Technical Details:

The Big-Five model quantifies personality by summing responses across 120 descriptive statements. Each response ranges from 1 (very inaccurate) to 5 (very accurate). Reverse-keyed items invert the scale before aggregation, ensuring conceptual consistency. Raw domain totals therefore span 24 – 120 points and reveal relative preferences for imagination, diligence, sociability, compassion, or emotional stability.

$S{d}_{\mathrm{trait}}=\sum _{i=1}24f(r{i}_{\mathrm{trait}})$, where f( ) returns r for standard items and 6 − r for reverse-scored items.

Higher totals indicate stronger trait expression. Scores near the mid-point suggest balanced tendencies, while extremes imply pronounced preferences. Researchers often convert raw sums to percentile ranks before cross-person comparisons.

• r_i – your 1–5 rating for item i.
• S_d – summed raw score for one trait.
• Reverse flag – indicates scale inversion before summing.
• 24 – 120 range – theoretical minimum and maximum per trait.

• Assumes honest self-reporting; social desirability skews results.
• Measures typical behaviour, not situational extremes.
• Reverse-scoring assumes equal interval distances. May mis-represent nuance.
• Raw sums ignore age, culture, and gender norms.

• Missing answers halt scoring until all items are completed.
• Uniform “5” responses inflate every trait indiscriminately.
• Browser storage limits could truncate the encoded string.
• Screen readers may require extended time for large item sets.

Concept grounded in Goldberg et al. (2006) lexical studies and Johnson’s (2014) public-domain adaptation of the IPIP-NEO-120. Comparative validity confirmed across multiple language translations and occupational samples.

No personal data leaves your device, aligning with GDPR principles of data minimisation.

Step-by-Step Guide:

Follow these steps to obtain your Big-Five profile.

1. Click Begin Assessment to load the first statement.
2. Read each statement and choose a rating from 1 to 5 that reflects your current self-view.
3. Use the side list to revisit any unanswered item; the progress bar updates instantly.
4. After the final response, review your domain badges and radar chart.
5. Optionally print or save the answer table for personal reflection.

FAQ:

Glossary:

Big Five

Five-factor model of personality.

Facet

A narrower trait within a Big-Five domain.

Reverse scoring

Flips 1→5, 2→4, etc. before summing.

Raw score

Unadjusted domain total.

Percentile

Position relative to a reference sample.