In their book ‘The H Factor of Personality’, Canadian (organisational) psychologist Kibeom Lee and Michael C. Ashton describe why, for example, some people are manipulative and others materialistic. They do this based on the so-called HEXACO Personality Test. This model can map human personalities. The letters are an acronym for Honesty-Humility, Emotionality, eXtravesion, Agreeableness, Conscientiousness and Openness to experience. The purpose of the HEXACO Personality Test is to provide as complete an image of human personality as possible.