Personality Test Knowledge Base
Four very different tools live on this site — one is the most evidence-backed model in personality science, and one has no scientific basis at all. Here’s where each one came from, what it actually measures, and a page for every type it can give you. Or take the quiz to find your own.
16 Personalities
A 4-letter typology that sorts cognitive style into 16 types, built to make Carl Jung's theory of psychological types usable as an everyday self-report questionnaire.
Useful vocabulary, weaker evidence than Big Five →Big Five
The model with the strongest research backing in personality psychology — five broad traits, each scored on a continuous spectrum rather than sorted into a type.
Strong, peer-reviewed support →Human Design
In its original form, a birth-time chart claiming to reveal your energy type, decision-making strategy, and inner authority. What's offered here is a simplified, self-report take on just the energy-type layer — no birth data involved.
No scientific basis →4 Color Types
A fast, visual read on dominant behavioral style — driven, analytical, supportive, or expressive — popular in team-building and corporate training for how quickly it gives a group shared vocabulary.
Popular training tool, limited academic validation →Combinations
How results from two different frameworks play out together.