Method

Behaviour-based psychometric reading. 21 scenarios, 10 Origins, Bayesian update.

Revealed preference

People cannot describe themselves accurately — social desirability, self-knowledge limits, expression differences. But when they choose, they show what they want. ChoiceCodex relies on this: observation, not narration.

Bayesian update

The ten Origins begin equally probable. Each scene presents two choices; the choice maps to a 22-tag profile; the tag-affinity matrix updates the posterior. After 21 scenes, one or two Origin patterns emerge as dominant.

Six axes × six modifiers

The Origin typology is defined on six behaviour axes: activation, resource priority, analytical reasoning, rule orientation, threat response, scope of concern. Each axis is a spectrum, not a category. Origins are different patterns on these spectra.

Uncertainty report

The posterior is a distribution, not a verdict. ChoiceCodex does not hide that: the top three Origins are visible, a confidence band is reported, sub-threshold readings are flagged as uncertain.

What we avoid

• No 'you are X' sentence.
• No score, no ranking — only distribution.
• No right answer — only tag-affinity.
• No life prediction — only the pattern of this voyage.

Replicability

The same decisions yield the same posterior. Scenarios, the tag-affinity matrix, and Origin definitions are published as open documentation.