2D histograms for stellar accretion rate versus disc mass at 2 Myr, showing the effects of the different parameters, as given above each panel. The top row shows the effect of increasing the initial disc mass M_D. The middle row shows the effect of reducing the disc characteristic radius r₁. The bottom row shows the effect of the disc viscosity parameter α. The observed data from the Lupus (in red) and Chamaeleon I (orange) star-forming regions from Manara et al. (2019) are shown for comparison.