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Recent research has suggested that the six-dimensional personality model, and especially the dimension Honesty-Humility/Integrity, adds incremental validity to the prediction of important criteria. We expected both this dimension and the dimension Conscientiousness to explain incremental variance in two academic criteria, namely grade point average (GPA) and counterproductive academic behaviour (CAB). In addition, we expected the more specific, so-called narrow traits of Conscientiousness and Honesty-Humility/Integrity to be stronger predictors of academic criteria than the broad traits. To test these expectations, two studies were conducted using the HEXACO Personality Inventory Revised (HEXACO-PI-R) and the Multicultural Personality Test-Big Six (MPT-BS). The results confirmed our expectations and suggest that academic criteria may be predicted with greater accuracy by focusing on the narrow traits of Conscientiousness and Honesty-Humility/Integrity.

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Egoism is a personality trait that is associated with self‐enriching and self‐centred behaviours. Research has suggested that egoism lies beyond the Big Five personality factors. Recently, the HEXACO model of personality has been proposed as an alternative to the Big Five model. In three studies, the relation between the HEXACO Personality Inventory and egoism, conceptualized using three different questionnaires (DPQ Egoism, SPI Egotism and the Egoism Scale), is investigated. In all three studies, the HEXACO Honesty–Humility factor scale was the most important predictor of egoism. Additionally, in two studies in which FFM measures were used, the HEXACO Personality Inventory explained more variance in egoism than did the FFPI (Study 2) and the NEO‐PI‐R (Study 3). Copyright © 2009 John Wiley & Sons, Ltd.

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