Table 4. Summary of model performance for dataset D when using the unaltered (normal) model and when increasing the elastic modulus of skin 1000-fold for indentations beyond 1mm (modified).

Model	% variance in roughness explained by mean rate	% variance in roughness explained by spatial variation	d.o.f.	T statistic (W-H test of correlations)	P value
Normal	87.5%	79.9%	13	+0.88	3.93e-01
Modified	88.1%	80.9%	13	+0.89	3.91e-01