IPIP-NEO (120-Item)

A full, citation-backed scientific write-up for this scale — overview, clinical use, and psychometrics in the voice of a dissertation "Measures" section — has not yet been authored. To honor the platform's no-fabricated-sources rule, this page currently shows only the verified registry facts above (item count, structure, scoring, and any published norms). No validity coefficients, reliability figures, or citations are shown here that cannot be traced to a named source; the authored write-up will be added once its sources have been read and recorded in the plan-integrity file.

“Worry about things.”

Illustrative only. During administration items are presented one screen-set at a time; response-key direction is never shown to respondents.

Item responses are summed within each scale (reverse-keyed items recoded first) and expressed as a population percentile against the cited reference sample, with a reliability-based confidence range where α is published.

Kajonius, P. J., & Johnson, J. A. (2019). Assessing the Structure of the Five Factor Model of Personality (IPIP-NEO-120) in the Public Domain. Europe’s Journal of Psychology, 15(2), 260–275. https://doi.org/10.5964/ejop.v15i2.1671 — Large (N = 320,128), self-selected online volunteer sample; not nationally representative (Openness and Altruism facets may be elevated). Facet scores: 4-item sums, range 4–20. Domain scores: mean of the six facet sums, range 4–20.

Johnson, J. A. (2014). Measuring thirty facets of the Five Factor Model with a 120-item public domain inventory. Journal of Research in Personality, 51, 78–89.