Five Factor Model is a theory based upon the Big Five personality traits, identified as openness to new experiences, conscientiousness, extra version, agreeableness, and neuroticism. These traits represent stable individual differences (an individual may be high or low on a trait as compared to others) in the thoughts people have, the feelings they experience, and their behaviours. Each trait can be broken down into sub-traits, allowing minor variations in personalities to be standardized and tracked.