Normalized distribution of the residuals from the best-fitting L_acc − L_* (left panel) and (right panel) relation, computed within the same L_* and M_* ranges as were probed with the GHOsT data. In black we show the distribution for the Taurus sample, and the distributions of Lupus and Chamaeleon I are reported in blue and magenta, respectively. The spread of the distributions is labeled in the panels. They are computed as the 1σ of the Gaussian fits to the distributions.