Logarithmic luminosity of [O I] 6300 Å LVC as a function of log L_acc (upper left panel), log Ṁ_acc (upper right panel), log L_⋆ (lower left panel), and log M_⋆ (lower right panel) for stars with detected forbidden line emission in our sample (labeled on each plot). In the upper panels, accretion parameters derived from the Balmer continuum diagnostics (see Sect. 3.1.1) are marked as blue dots, while those derived from the luminosity of emission lines (see Sect. 3.2.1) are marked as red triangles. On each panel, the correlation relationship between the relevant quantities derived by Nisini et al. (2018) is traced as a solid black line, while dotted gray lines mark a range of ±1 dex around the calibration (which corresponds to the vertical spread of points observed on the corresponding diagrams in Nisini et al. 2018). The correlation trends obtained by Natta et al. (2014) are also shown as dashed magenta lines for comparison (left panels).