The research of Costa and McCrae suggests that personality traits fall into five broad categories, with each category displaying a number of facets. Their NEO-PI personality trait inventory labels these categories and facets as follows:

* Neuroticism – Anxiety, Angry Hostility, Depression, Self-Consciousness, Impulsiveness, and Vulnerability;

* Extraversion – Warmth, Gregariousness, Assertiveness, Activity, Excitement-Seeking, Positive Emotions;

* Openness – Fantasy, Aesthetics, Feelings, Actions, Ideas, Values;

* Agreeableness – Trust, Straightforwardness, Altruism, Compliance, Modesty, and Tender-Mindedness;

* Conscientiousness – Competence, Order, Dutifulness, Achievement Striving, Self-Discipline, and Deliberation.