Relation between the clump-averaged separations between the cores provided by the median and the L/M ratio, color-coded to indicate the number of cores detected in the clump. To support the visualization, different sizes are adopted to identify systems 4<N_cores<8 (low), 8 ≤ N_cores<16 (intermediate), and N_cores ≥ 16 (high). The different symbols refer to the clumps of the near (circle) and far (diamond) sample. The solid lines show the median of the distribution of the separations computed in bins of L/M of width 0.4 dex for the near (blue) and far (green) sample, respectively, while the black dashed line corresponds to the median of all the clumps with N_cores ≥ 4.