Fraction of type 1 AGN hosts with tidal features (f_T) and its excess (e_T), defined as the ratio of f_T for AGNs to that of the matched inactive control sample, shown using colors and contours in the log M_BH vs. log L_[O III] plane (the left panel is for f_T, while the right panel is for e_T). See the color bars for the color-coded representations of f_T and e_T. The values in the middle of the contour lines denote f_T or e_T. To create color maps and contours, we used a grid with block sizes of 0.23 dex and 0.30 dex along the log M_BH and log L_[O III] axes, respectively. At each grid point, we calculated f_T using a rectangular bin with side lengths of 1.38 dex and 1.80 dex along the log M_BH and log L_[O III] axes, respectively, and computed e_T using a rectangular bin with side lengths of 1.84 dex and 2.40 dex. Using a larger bin size than the grid block size to compute the parameters smooths the color maps and contours, revealing the large-scale trends more clearly. We display only the colored bins for which more than 10 and 25 AGNs are used to compute f_T and e_T, respectively.