Specific black-hole accretion rate, λ_sBHAR, as function of R23 (left panel) and O32 (right panel) parameters for the different AGN samples. The plotted symbols are the same as those in Figure 9. Objects without error bars correspond to sources for which the uncertainty in the Hβ emission line is not available. Points enclosed by large circles represent sources with log(R23) > 1.