Keirsey Temperament Theory sorts the sixteen personality types into four broad patterns — Artisan, Guardian, Idealist, and Rational — each defined by a core need that shapes everything a person values, pursues, and fears losing.

Key Insight

Keirsey's move was to stop asking how people think and start asking what they need. Where the function-based reading of type maps the machinery of cognition, temperament maps motivation — and motivation is what you actually see in behavior. That is why Keirsey insisted you can observe temperament directly, without the introspective guesswork that function analysis demands.

Sources

  • Keirsey, David, and Marilyn Bates. Please Understand Me: Character and Temperament Types — Prometheus Nemesis Book Company, 1978.
  • Keirsey, David. Please Understand Me II: Temperament, Character, Intelligence — Prometheus Nemesis Book Company, 1998.
  • Galen. De Temperamentis — 2nd century CE (the humoral source Keirsey names as his historical antecedent).