Why estimating relative differences by Ln(A/B) in percentage and why naming it geometric difference
Pourquoi estimer la différence relative entre B et A par Ln(A/B) en pourcentage et la nommer différence géométrique
Résumé
Between stimuli or performances A and B, the ratio’s natural logarithm Ln(A/B) best expresses their relative difference, especially given as a percentage. I name it "geometric difference" as opposed to the "arithmetic difference" (A-B), by analogy with arithmetic and geometric progressions and arithmetic and geometric means.
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