How to cite these figures

Cite the edition

Reliability is recomputed from live data, and each page names its edition: 2026-10-23 for the reliability tables, with norms pulled 2026-10-22. A coefficient quoted without its date cannot be checked.

This site

APA 7:

JobCannon. (2026). IPIP-NEO-120 reliability and percentile norms [Data set]. ipipneo.org. https://ipipneo.org/

BibTeX:

@misc{jobcannon2026ipipneo120,
  author       = {{JobCannon}},
  title        = {{IPIP-NEO-120} reliability and percentile norms},
  year         = {2026},
  howpublished = {\url{https://ipipneo.org/}},
  note         = {Edition 2026-10-23. Licence CC BY 4.0}
}

The technical manual

For the full method, the figures cited here and everything behind them, cite the JobCannon IPIP-NEO-120 technical manual:

JobCannon (2026). IPIP-NEO-120 technical manual: internal consistency of 5 domains and 30 facets, inter-domain structure and norms from 3,079 first-party results [Technical report]. JobCannon Research. Retrieved 2026-10-23, from https://jobcannon.io/research/ipip-neo-120

The instrument

The 120-item inventory itself is Johnson’s. The items are in the public domain.

• Johnson, J. A. (2014). Measuring thirty facets of the Five Factor Model with a 120-item public domain inventory: Development of the IPIP-NEO-120. Journal of Research in Personality, 51, 78–89.
• 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.
• Goldberg, L. R., Johnson, J. A., Eber, H. W., Hogan, R., Ashton, M. C., Cloninger, C. R., & Gough, H. G. (2006). The International Personality Item Pool and the future of public-domain personality measures. Journal of Research in Personality, 40(1), 84–96.

Reusing the data

The tables are available as CSV and JSON under CC BY 4.0: share and adapt them, with credit to JobCannon and a link to the edition you used.