Personality Traits: These are enduring patterns of thoughts, feelings, and behaviors that make up an individual's unique personality.
Five-Factor Model: This model suggests that personality can be described using five broad dimensions known as openness, conscientiousness, extraversion, agreeableness, and neuroticism.
Big Five Inventory: It is a self-report questionnaire used to measure the five dimensions (including agreeableness) of the Five-Factor Model.