Significance levels (in units of effective σ) of the parameter shifts between two multipole ranges, according to a given statistic, as a function of ℓ_split. The specific choice of the two multipole ranges and the statistic used are labelled on each panel. The blue line is the “local” significance, calculated as described in Sect. 3.3. The orange line is the “global” significance which should be used to interpret the significance of any outliers we find (see Appendix A for further description).