Final answer:
The HEXACO model adds the sixth dimension of honesty-humility to the Big Five personality factors, forming a model that includes six broad traits that contribute to our understanding of personality.
Step-by-step explanation:
The HEXACO model incorporates a sixth dimension known as honesty-humility into the Big Five factor model of personality. This model includes the dimensions of honesty-humility, emotionality, extraversion, agreeableness, conscientiousness, and openness to experience. The original Big Five personality factors are openness to experience, conscientiousness, extroversion, agreeableness, and neuroticism, often remembered with the acronym OCEAN. The HEXACO model adds the sixth trait of honesty-humility to provide a more comprehensive understanding of personality.