Placeholder — The science
An explainer of the personality typology systems we support and our tiered-honesty stance — which instruments we trust most, which are lighter-weight, and what's hedged. Instrument-agnostic by design; HEXACO is the first reference rubric, not the spine.
Tier 1 — well-validated
Instruments with strong psychometric backing.
Tier 2 — useful, lighter
Popular frameworks, honestly caveated.
What's hedged
Where we say "suggestive, not settled."