Same as Fig. 15 but for the sample of galaxies where quasars have been visually inspected. The dashed black lines indicate the trends obtained after excluding all 67 classified optical quasars. Left: Merger fraction f_merger as a function of f_AGN. Right:f_merger as a function of BHAR or the equivalent AGN bolometric luminosity L_disc. These trends are similar to the ones presented for the main sample in Fig. 15. The overall trends hold even if we exclude all quasars from our sample.