The relationship between [O iii] and rest-frame 12 μm luminosity for the quasars in our sample and those of Reyes et al. (2008). All objects with WISE counterparts are shown here, not just those lying within the wedge of Fig. 10. The solid line is the best-fitting power-law obtained by minimizing perpendicular residuals and the dashed line is the best-fitting linear dependence, with best fits quantified by equations (3).