Accuracy of the reconstructions as measured with the Generalized Quartet Distance (GQD).

For each continent we report the average and the variance of the GQD over all the languages spread on the continent. The different columns correspond to the two different ways of constructing the distance matrix (LDN and LDND) and to the three distance-based algorithms considered. The last column labelled RANDOM reports the results for the null model considered. See the main text for details.