Normalized excess variance, , against the black hole mass, M_BH for the Seyfert 1.8/1.9 in the sample (blue circles) and Seyfert 2 in Hernández-García et al. (2015; red squares). Results for the CAIXA sample using light curve segments of 40 ks (Ponti et al. 2012) are presented, including sources with FMWH(H_β) > 2500km s^-1 (green diamonds), FMWH(H_β) < 2500 km s^-1 (orange triangles), and those with no H_β (yellow hexagons). The dotted, dash-dotted, and dashed lines are the universal PSD model, represented as a broken power law (Papadakis 2004) using R_Edd = [0.005, 0.025, 0.5].