Big Five (Five-Factor Model)
Five broad, continuous dimensions that capture most of the stable differences between people: openness, conscientiousness, extraversion, agreeableness and neuroticism. Everyone sits somewhere on each dimension; nobody is a 'type'.
What drives it
Explains the baseline: how someone tends to behave across situations before any defence, wound or context is layered on top. Useful for identification because it separates temperament-level style (he is low in agreeableness) from pathology (he is exploitative), and because the traits predict real outcomes: job performance, divorce, health, income.
How it shows
Work
You can rate a colleague within weeks: does she float new ideas or prefer the proven route (openness), deliver on time without chasing (conscientiousness), fill the room or go quiet (extraversion), concede easily or fight for her position (agreeableness), stay level or spiral under pressure (neuroticism). Most friction between capable people is trait mismatch, not malice: the high-conscientiousness CFO and the high-openness founder both think the other is the problem.
Relationships
Couples differ most visibly on conscientiousness (tidiness, money, punctuality) and neuroticism (who worries, who reassures). The partner's neuroticism is the single strongest trait predictor of relationship dissatisfaction for both people.
Self
Notice what you do when nobody requires anything: whether you seek people, novelty, order, harmony or reassurance. Traits show up in the default, not the performance. If your self-rating differs sharply from how close colleagues rate you, trust theirs on the visible traits (extraversion, conscientiousness) and yours on the inner ones (neuroticism).
What tells it apart
Myers-Briggs Type Indicator (MBTI): MBTI forces people into one of two boxes per dimension and its types do not re-test reliably; the Big Five measures degree, so two people both called 'introverts' can sit at the 10th and 45th percentile and behave very differently.
HEXACO model: HEXACO adds a sixth factor, honesty-humility; if the person you are assessing is pleasant and cooperative but quietly exploitative, the Big Five will score them as agreeable and miss it, while HEXACO catches it.
Levels of personality organisation (Kernberg): The Big Five describes style; Kernberg's levels describe structural health. Two people with identical trait profiles can differ completely in whether they keep a stable sense of self and others under stress.
A test
Watch the same person across at least three different kinds of situation (deadline, social event, conflict) and rate what repeats; a trait is what survives the change of context.
Questions to carry
- Across a deadline, a party and a conflict, what in this person stays the same?
- Which of my habits shows up in every setting I’m in, and which only in some?
How strong the research is
strong
Where it comes from
Ernest Tupes and Raymond Christal, 1961; Warren Norman, 1963; Lewis Goldberg, 1981 (the name 'Big Five'); Paul Costa and Robert McCrae, NEO-PI, 1985 and 1992
On the family tree: Paul Costa and Robert McCrae
Sources
- Paul T. Costa Jr and Robert R. McCrae, The NEO Personality Inventory Manual (1985)
- Kibeom Lee and Michael C. Ashton, Psychometric Properties of the HEXACO Personality Inventory (2004)
- Robert Hogan, Personality and the Fate of Organizations (2007)
- Daniel Nettle, Personality: What Makes You the Way You Are (2007)