Frameworks
Four well-known ways of describing personality and one map that joins them, each with an honest note on how much research stands behind it.

The 16 types
Jung's attitudes and functions, turned into four preferences and sixteen four-letter types by Briggs and Myers.
- Research base
- Moderate
- In your report
- Your four-letter code and archetype
The Big Five
Five broad traits found again and again when researchers analyze how people describe each other.
- Research base
- Strong
- In your report
- Your five trait estimates
Cognitive functions
Eight mental processes, and the order each type is said to use them in.
- Research base
- Limited
- In your report
- Your Lead, Support, Relief and Edge
The four families
Strategists, Seekers, Keepers and Improvisers: the sixteen types grouped by core motivation.
- Research base
- Limited
- In your report
- Your family and its drive
The Koseiha Compass
Our map built on the two metatraits above the Big Five, Stability and Plasticity, with nine named regions.
- Research base
- Mixed
- In your report
- Your compass bearing and region
One test, every lens
All five views come from the same five scales. This is how each scale feeds the 16 types and the Big Five.
| Koseiha scale | 16-type letters | Big Five trait |
|---|---|---|
| Energy | E / I | Extraversion |
| Perception | N / S | Openness |
| Decisions | T / F | Agreeableness |
| Structure | J / P | Conscientiousness |
| Composure | Not part of the code | Neuroticism |
Stability and Plasticity, the two axes of the Koseiha Compass, are averages of the Big Five traits. Cognitive functions and families follow from the four letters.