Fig. 1

Visualization of the Full Bayesian Significance Test. The e-value and FBST using a flat reference prior r(δ)∝1 (left) and wide Cauchy reference prior C(0,1) (right) against H₀ for the Bayesian two-sample t-test; the blue area indicates the integral over the tangential set \(\overline {T}(0)\) against H₀:δ=0, which is the e-value \(\overline {\text {ev}}\) against H₀; the red area is the integral over T(0), which is the e-value ev (H) in favour of H₀:δ=0