The HEXACO model of personality structure is a six-dimensional model of human personality. Its six factors, or dimensions, include Honesty-Humility (H), Emotionality (E), Extraversion (X), Agreeableness (A), Conscientiousness (C), and Openness to Experience (O). Each factor is composed of several lower-level traits (also called ‘facets’) indicating high or low levels of the factor (see section Scale Description for more detailed information on the factors and facets).
The HEXACO model distinguishes itself from the Big Five personality model by taking a 6th personality dimension into account: Honesty-Humility. Based on several reanalyzes of datasets on which the Big Five was based, researchers have concluded that the HEXACO model better captures the full range of personality. The extra Honesty-Humility scale complements the Big Five scales, thus providing a more complete measurement of personality. Honesty-Humility is closely related to behavioral traits associated with integrity. Apart from the extra Honesty-Humility dimension, two of the HEXACO dimensions, Emotionality and Agreeableness, are also somewhat different from its Big Five counterparts, Neuroticism and Agreeableness. The three remaining dimensions, Extraversion, Conscientiousness, and Openness to Experience are virtually identical in the HEXACO and Big Five models.
Further information about the HEXACO questionnaire & organization can be found on www.hexaco.org