• Checked 2 October 2026 · 6 min read

    The four temperaments vs 16Personalities, for couples

    Two ways to describe personality: an ancient four-part lens and a modern 16-type test. What each is good for when you are trying to understand a partner.
    Melancholic: a thoughtful reader in an indigo coat sharing a passage from a book with a partner on a bench under a tree

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    The short answer

    16Personalities sorts you into one of 16 types across five scales and says its dimensions rework the Big Five traits. It is free, about 10 minutes, and far more widely used than any temperament test.

    The four temperaments (Sanguine, Choleric, Melancholic, Phlegmatic) are a historical model with weaker evidence, but four simple types are easy for two people to remember and talk about. Use 16Personalities for a broad profile; use temperaments with love languages for a quick couple conversation.

    At a glance

    16Personalities and the four temperaments (checked 2 October 2026)

    • 16Personalities

      Origin
      Modern; Myers-Briggs-style letters, dimensions reworked from the Big Five
      Number of types
      16 types plus Assertive or Turbulent
      Evidence
      Tied to the Big Five, the most studied trait model
      Test length
      About 10 min
      Free
      Yes
      Love languages
      Not measured
      For couples
      A Romantic Relationships section in each type profile; no partner comparison found
      Scope
      Relationships, friendships, parenting, career

    • Four temperaments (Affinity Test)

      Origin
      Hippocrates and Galen; humoral theory abandoned in the 1800s
      Number of types
      4, scored as a blend
      Evidence
      Historical lens; loosely echoed by Eysenck's extraversion and neuroticism
      Test length
      Temperament test: 30 statements, about 5 min; full test 38 or 68 statements
      Free
      Yes
      Love languages
      Included in the full test
      For couples
      Partner invite link and free side-by-side preview
      Scope
      Relationships only

    What the four temperaments are

    Hippocrates tied four temperaments to four bodily humours; Galen later wrote the first temperament typology. The humoral theory was abandoned in the 1800s, though Hans Eysenck noted that his extraversion and neuroticism results resembled the four ancient types.

    Today the four temperaments are best used as a plain-language lens: Sanguine (social, upbeat), Choleric (driven, direct), Melancholic (thoughtful, careful) and Phlegmatic (calm, steady). Most people are a blend.

    What 16Personalities is

    A free personality test with 16 four-letter types inspired by Myers-Briggs naming, plus a fifth Identity scale (Assertive or Turbulent). It is far bigger and far more widely used than we are.

    • Free, about 10 minutes.
    • Reports more than 1.58 billion tests taken and availability in 45+ languages (its own counters).
    • Says it reworks the Big Five personality traits and does not use Jungian cognitive functions.
    • Five aspects: Energy, Mind, Nature, Tactics and Identity.
    • Type profiles include Romantic Relationships and Friendships sections; paid products include a Premium Career Suite.

    Which is more useful for couples?

    16Personalities is richer and better grounded in research. Its type profiles describe how each type behaves in romance, and it is the better choice if you want one detailed profile that also covers work and friendships.

    Temperaments are coarser, which is also their strength in a relationship: four types are easy to remember, and "I'm Choleric, you're Phlegmatic" is a quick way to name why one of you pushes and the other waits. Paired with love languages, they cover both how you react and how you want to be loved.

    Can you map temperaments to 16Personalities types?

    Not one-to-one. Eysenck placed the temperaments on two axes: Sanguine as stable and extraverted, Choleric as less stable and extraverted, Melancholic as less stable and introverted, Phlegmatic as stable and introverted. 16Personalities' Energy scale is also introversion and extraversion, so Sanguines and Cholerics tend towards E types and Melancholics and Phlegmatics towards I types. Beyond that, any mapping is a guess.

    Who should pick which

    • Pick 16Personalities

      Anyone who wants a broad personality profile that covers work and life, not only relationships.

    • Pick the four temperaments

      Couples who want a simple shared vocabulary for energy and conflict, combined with love languages, in one test they can both take.

    • Or use both

      They answer different questions. Your 16Personalities type and your temperament can sit side by side.

    Questions people ask

    Not as a validated model. They come from ancient humoral medicine, which was abandoned. Eysenck noted that the four types roughly echo combinations of extraversion and emotional stability, so they work as a reflective lens, not a diagnosis.

    No. It uses similar four-letter type names, but says it does not use Jungian cognitive functions and instead reworks the Big Five traits, adding a fifth Identity scale (Assertive or Turbulent).

    There is no official mapping. Sanguines are outgoing and tend to score as extraverted (E) types, but a Sanguine could be any of several E types.

    16Personalities gives a deeper individual profile; temperaments give a simpler shared language. Affinity Test pairs temperament with love languages and lets you compare with your partner.

    More comparisons

    See how you and your partner fit

    Take the free test for your temperament and love languages, then invite your partner to compare.

    Find our affinity
    Golden-hour hills with a winding path, a couple holding hands on a hilltop and two friends sitting under a tree