bfi25: Big Five Inventory - 25-item IPIP example dataset

In ackwards: Bass-Ackwards Hierarchical Structural Analysis

Big Five Inventory – 25-item IPIP example dataset

Description

A 1 000-row subset of the 25 IPIP Big Five personality-marker items from Revelle's psych package (psych::bfi). Included so that package examples and vignettes run without reaching into psych's namespace directly.

Usage

bfi25

Format

A data frame with 1 000 rows and 25 integer columns (Likert responses scored 1–6, with some NAs reflecting genuine missing values in the original survey). The 25 items span the Big Five personality domains:

Columns	Domain
A1--A5	Agreeableness
C1--C5	Conscientiousness
E1--E5	Extraversion
N1--N5	Neuroticism
O1--O5	Openness

Details

Derived from psych::bfi[, 1:25] by sampling 1 000 rows with set.seed(42). Missing values are preserved as in the original data. The full dataset (psych::bfi) contains responses from 2 800 participants collected via the SAPA project.

Each item column carries its public-domain IPIP stem (Goldberg, 1999) as a label attribute, so ackwards() captures it at fit time and top_items() prints the wording as code: label (e.g. ⁠E4: Make friends easily⁠) with no setup. These are plain attributes: base row-subsetting (e.g. na.omit(bfi25), bfi25[rows, ]) drops them, as base R does for any non-labelled-class vector, so fit on bfi25 directly – its NAs are handled by the missing argument of ackwards() – to keep the labels.

To regenerate this dataset, run source("data-raw/bfi25.R") from the package root.

Source

Revelle, W. (2026). psych: Procedures for Psychological, Psychometric, and Personality Research. Northwestern University, Evanston, Illinois. R package. https://CRAN.R-project.org/package=psych

Data collected via the SAPA (Synthetic Aperture Personality Assessment) project (https://www.sapa-project.org/). Items are public-domain IPIP (International Personality Item Pool) markers developed by Goldberg (1999):

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.

Examples

dim(bfi25)
head(bfi25)
attr(bfi25$E4, "label") # public-domain IPIP item stem

ackwards documentation built on July 25, 2026, 1:08 a.m.