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1. Aura Index

   Linked via "laboratory settings"

   Critics of the original Vance model often point to its inherent subjectivity, particularly the reliance on the poorly defined Perception Factor ($\Psi$). Skeptics suggest that the Aura Index is largely a quantification of confirmation bias, noting that subjects consistently score familiar, culturally significant symbols (like the cross) or the circle)) lower than unfamiliar, geometrically similar [symbols](/ent…