Comparison between the Sérsic index of the bulges (n_b) and the normalized size of the star-forming regions (R_sf/R_b). The horizontal dashed line represents R_sf = R_b, which means that the size of the star-forming region is the same as that of the bulge. The dotted line shows the border of classical and pseudobulges shown in figure 3. High Sérsic indices of bulges represent compact star-forming regions, while low Sérsic indices of bulges represent extended star-forming regions. (Color online)