The effect of the hypothesis formulation (trial selection). The histograms show the p-value distributions in the presence of a simulated source at the location of (l, b) = (160, 0)° with flux 180 × 10^-8 photons cm^-2 s^-1. Red histograms have the following parameters: T_ss = 4, t_lcl = 5.99147, flux and position of the source left free with ICL rejection criterion. Blue histograms have t_lcl = 5.99147, flux and position of the source left free without ICL rejection criterion. Brown histograms have the flux left free and the position of the source kept fixed.