40 questions. A complete picture of who you are — your strengths, your blind spots, your nature.
Three reads to place what the test measures.
The MBTI doesn't give the same result twice and runs on the Barnum effect. What the Big Five does instead, and why the difference matters.
The model researchers actually use, explained without jargon. The five traits, what they don't measure, and why their crossing matters.
A little, slowly, and not in the direction you think. What research says about the stability of traits, and the levers you actually have.