Which of the following is NOT a Big Five personality trait?

• A. Openness to experience
• B. Conscientiousness
• C. Neuroticism
• D. Aggressiveness

Answer: (D)

The Big Five describe five broad personality dimensions: Openness to experience, Conscientiousness, Extraversion, Agreeableness, and Neuroticism. Among the options, Openness to experience, Conscientiousness, and Neuroticism are all established parts of that model. Aggressiveness, however, is not one of the Big Five dimensions; it’s a specific behavioral tendency that can be related to other traits (for example, low Agreeableness or high Neuroticism) but it isn’t a standalone Big Five trait. So aggressiveness doesn’t fit the Big Five framework, making it the correct choice.