We introduce a personality inventory designed to measure six major dimensions of personality derived from lexical studies of personality structure. The HEXACO Personality Inventory (HEXACO-PI) consists of 24 facet-level personality trait scales that define the six personality factors named Honesty-Humility (H), Emotionality (E), Extraversion (X),…

The parameters of full-information item factor models of varying dimensionality and mixed-measurement models of varying numbers of latent classes were estimated in 1,000 responses to a measure of Positive Interpersonal Engagement. The most appropriate representation of the data and deciding between mixed-measurement and dimensional representations…

The present research examined the amount and kind of personality measured within four sets of personality disorder (PD) scales. Three samples of undergraduate students (Ns = 326, 537, and 617) completed at least one PD measure and a combined interpersonal circumplex model (ICM) and five-factor model (FFM) measure. The FFM dimensions were found to…

This study describes the relation between personality items' validities, defined as the items' correlations with acquaintance ratings on the Big 5 personality factors, and other itemmetric properties including ambiguity, syntactic complexity, social desirability, content, and trait indicativity. Five external validity coefficients for each item on…

The structure of voters' affective reactions and trait attributions to national political figures was studied through 3-mode factor analysis of ratings by 78 college students of 16 political figures. The factor analysis suggested that positive and negative affect and affect and trait factors were distinct but correlated. (SLD)