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Table 2 Results of multiple comparisons applied to maximum frequency values. fmax (Dunn method). The test computes statistic Q. the number of rank sums. and shows whether P < 0.05 or not for the pair being compared. P is the probability that the null hypothesis may be rejected and so concludes that there are differences between treatments. Diff of ranks is the difference in the rank sum orders being compared. The rank sums are a measure of the difference between two treatments.

From: Texture discrimination and multi-unit recording in the rat vibrissal nerve

  Pressure level 1 Pressure level 2
Comparison Diff of Ranks Q P < 0.05 Diff of Ranks Q P < 0.05
Control vs Wood 0.600 1.897 No 1.120 3.542 Yes
Control vs Metal 0.210 0.664 No 0.140 0.443 No
Control vs Acrylic 1.830 5.787 Yes 0.740 2.340 No
Control vs Sandpaper 2.130 6.736 Yes 1.670 5.281 Yes
Wood vs Metal 0.390 1.233 No 0.980 3.099 Yes
Wood vs Acrylic 2.430 7.684 Yes 1.860 5.882 Yes
Wood vs Sandpaper 2.730 8.633 Yes 2.790 8.823 Yes
Metal vs Acrylic 2.040 6.451 Yes 0.880 2.783 No
Metal vs Sandpaper 2.340 7.400 Yes 1.810 5.724 Yes
Acrylic vs Sandpaper 0.300 0.949 No 0.930 2.941 Yes
  Pressure level 3 Pressure level 4
Comparison Diff of Ranks Q P < 0.05 Diff of Ranks Q P < 0.05
Control vs Wood 0.600 1.897 No 0.400 1.265 No
Control vs Metal 0.210 0.664 No 0.450 1.423 No
Control vs Acrylic 0.040 0.126 No 1.380 4.364 Yes
Control vs Sandpaper 1.200 3.795 Yes 1.570 4.965 Yes
Wood vs Metal 0.810 2.561 No 0.050 0.158 No
Wood vs Acrylic 0.640 2.024 No 0.980 3.099 Yes
Wood vs Sandpaper 1.800 5.692 Yes 1.170 3.700 Yes
Metal vs Acrylic 0.170 0.538 No 0.930 2.941 Yes
Metal vs Sandpaper 0.990 3.131 Yes 1.120 3.542 Yes
Acrylic vs Sandpaper 1.160 3.668 Yes 0.190 0.601 No