Effective overshoot value (in units of H_P) plotted as a function of fractional core radius and mass. From the top left, the panels are: convective core radius fraction (R_CZ/R), convective core mass fraction (M_CZ/M), mixed core radius fraction (R_mixed/R), and mixed core mass fraction (M_mixed/M). The color of the points indicate the star’s total mass. The red line is a weighted linear best fit. The inferred values for this plot come from the grid of models that implement a radiative gradient in the convective region (overmixing).