Table 2.

Performance of candidate g-scales for sets A and B. Methods 1–6 are previously described, 7–10 are novel.

number of parametersranking performance (%)accuracy (RMSE)/jnd
measureA (88%)B (86%)A
1mean nearest-neighbour distance0 + 281651.84
2variance of number of neighbours0 + 281751.52
3variance of Voronoi cell area0 + 279731.99
4Voronoi cell area disorder0 + 278731.92
5variance of nearest-neighbours distances0 + 281631.64
6autocorrelation1 + 286810.85
7pairwise local symmetry2 + 286831.17
8centroidal symmetry2 + 287830.97
9DSE1 + 288810.58
10DTE (our preferred g-scale)2 + 288830.49