Correlation between the orbital parameters and the relative decay timescale of starspots. Since the relative decay time crosses about 3 orders of magnitude, the logarithmic scale is used to display them. The blue dots show the data from the entire sample. The red dots and lines represent the median of τ/P_rot in the orbital parameter bins. For panel e, because the circular sources are plotted in one bin, only six medians are shown in panel e.