The five-factor model — usually called the Big Five — describes personality as five broad traits: openness, conscientiousness, extraversion, agreeableness and neuroticism. Each trait is a scale, not a category: most of us sit somewhere between the ends, and neither end of the scale is better than the other.
Last updated September 2026
It starts from a simple idea: differences between people that matter have found words in language. Researchers collected thousands of words that describe people and examined statistically which belong together. Several research groups independently arrived at five clusters. Lewis Goldberg, and with questionnaires Paul Costa and Robert McCrae, made the model widely known in the 1980s and 90s. Today it is the personality model most used in psychological research.
Openness is about curiosity and how drawn you are to new ideas, impressions and experiences. Conscientiousness is about structure, reliability and whether you prefer to plan or improvise. Extraversion is about how much energy you draw from other people and from what goes on around you. Agreeableness is about warmth, trust and willingness to cooperate. Neuroticism is about how easily and how strongly you react with feelings such as worry, irritation and low mood — its opposite is often called emotional stability.
A score describes a tendency, not a worth. High conscientiousness can make you reliable and also rigid; low can make you flexible and also less predictable. High neuroticism means you feel discomfort more clearly — it is not a diagnosis. What a trait means for you depends on the life you live and the situation you are in.
Fairly stable, but not locked. The traits are quite stable in adulthood, and also change a little across life. A large review of longitudinal studies found that on average people become more conscientious and emotionally stable from young adulthood onwards. Those are averages — individuals can move in other ways.
Type tests such as the Myers-Briggs sort people into categories, for example introvert or extrovert. The five-factor model instead measures where on a scale you are. Because most people sit near the middle on most traits, a scale gives a more precise picture than a label. That is one reason research mainly uses the five-factor model.
A test is based on how you describe yourself, and gives a picture of your tendencies: what gives you energy, what stresses you, how you tend to meet others. It cannot diagnose, predict how things will go for you, or tell you who you ought to be. It is most useful as a starting point for understanding your own patterns.
The initials of the five traits: Openness, Conscientiousness, Extraversion, Agreeableness and Neuroticism.
No. In the five-factor model neuroticism is an ordinary personality trait everyone has to a greater or lesser degree. It describes how readily one feels negative emotions, and is not a mental disorder.
It varies. Short versions have 10–60 statements, more thorough versions 120 or more. More questions usually give a more nuanced picture, especially of the facets within each dimension.
BeBalanced.ai starts with a Big Five test, and the coach uses your profile to tailor conversations and exercises. The app is developed with clinical psychologists.
BeBalanced.ai is a tool for self-insight and emotional training, not healthcare or treatment. If you need someone to talk to right now, contact your local crisis line. In an emergency, call your national emergency number.