Meta-Analytic Investigations of the HEXACO Personality Inventory(-Revised) Reliability Generalization, Self-Observer Agreement, Intercorrelations, and Relations to Demographic Variables

The six dimensions of the HEXACO model of personality are most commonly measured via the HEXACO Personality Inventory(Revised) (HEXACO-PI(-R)), which comes in three versions (60, 100, and 200 items) and is available as a self- and observer report form in several languages. The present study meta-analytically investigates the psychometric properties of the HEXACO-PI(-R), relying on empirical data from 549 independent samples providing information about 316,133 individuals. In particular, we performed reliability generalization meta-analyses to examine internal consistency, determined self-observer agreement, investigated structural properties in terms of the intercorrelations between the HEXACO dimensions, and established relations between the dimensions and demographic variables. Results show that all HEXACO-PI(R) versions exhibit fairly high reliabilities and a high degree of self-observer agreement. With the exception of a moderate correlation between Honesty-Humility and Agreeableness, the HEXACO dimensions are only weakly correlated overall. Finally, notable gender differences (with women scoring higher) occurred on Emotionality and Honesty-Humility.