HEXACO

The HEXACO model of personality structure is a six-dimensional model of human personality that was created by Ashton and Lee based on findings from a series of lexical studies involving several European and Asian languages. The 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 traits with characteristics indicating high and low levels of the factor. The HEXACO model was developed through similar methods as other trait taxonomies and builds on the work of Costa and McCrae and Goldberg. The model, therefore, shares several common elements with other trait models. However, the HEXACO model is unique mainly due to the addition of the Honesty-Humility dimension.

The HEXACO model of personality conceptualizes human personality in terms of six dimensions.

The HEXACO model was developed from several previous independent lexical studies. Language based taxonomies for personality traits have been widely used as a method for developing personality models. This method, based on the logic of the lexical hypothesis, uses adjectives found in language that describe behaviours and tendencies among individuals. The identified adjectives are distilled down through factor analysis to yield a manageable number of groups of related personality traits.

Research studies based on the lexical hypothesis described above were first undertaken in the English language. Subsequent research was conducted in other languages, including Croatian, Dutch, Filipino, French, German, Greek, Hungarian, Italian, Korean, Polish, Russian, and Turkish. Comparisons of the results revealed as many as six emergent factors, in similar form across different languages including English. The six factors are generally named Honesty-Humility (H), Emotionality (E), Extraversion (X), Agreeableness (A), Conscientiousness (C), and Openness to Experience (O). The personality-descriptive adjectives that typically belong to these six groups are as follows:

Personality is often assessed using a self-report inventory or observer report inventory. The six factors are measured through a series of questions designed to rate an individual on levels of each factor. Ashton and Lee have developed self- and observer report forms of the HEXACO Personality Inventory-Revised (HEXACO-PI-R). The HEXACO-PI-R assesses the six broad HEXACO personality factors, each of which contains four "facets", or narrower personality characteristics. (An additional 25th narrow facet, called Altruism, is also included and represents a blend of the Honesty-Humility, Emotionality, and Agreeableness factors.) The four facets within each factor are as follows:

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