Scatter plots of radio loudness (ℛ) versus Eddington ratio (λ) for different subsamples: radio Seyfert and OPARG (a); radio Seyfert and extended sources (b); radio Seyfert, OPARG, and OPIRG (c); and by optical morphology: spiral, lenticular, and elliptical (d). Extended sources are those classified with radio morphologies FRI, FRII, FRI/II, OI, OII, Z, X, DD, WAT, NAT, or HT in the ROGUE catalogues. Subsample sizes are indicated in each panel. Marginal 1D histograms of radio loudness for each subsample are shown on the right-hand side of each panel. Reference lines and primed and unprimed quantities are as in Fig. 4.