Stimulus feature	Feature in terms of three cardinal features	Log of feature in terms of log of three cardinal features	Log of feature ratio in terms of log of three cardinal ratios
Total surface area (TSA)	$TSA=\sqrt{Sz·n}$	$\text{log}(TSA)=\frac{1}{2}\text{log}(Sz)+\frac{1}{2}\text{log}(n)$	$\text{log}(r_{TSA})=\frac{1}{2}\text{log}(r_{Sz})+\frac{1}{2}\text{log}(r_n)$
Item surface area (ISA)	$ISA=\sqrt{\frac{Sz}{n}}$	$\text{log}(ISA)=\frac{1}{2}\text{log}(Sz)-\frac{1}{2}\text{log}(n)$	$\text{log}(r_{ISA})=\frac{1}{2}\text{log}(r_{Sz})-\frac{1}{2}\text{log}(r_n)$
Field area (FA)	$FA=\sqrt{Sp·n}$	$\text{log}(FA)=\frac{1}{2}\text{log}(Sp)+\frac{1}{2}\text{log}(n)$	$\text{log}(r_{FA})=\frac{1}{2}\text{log}(r_{Sp})+\frac{1}{2}\text{log}(r_n)$
Sparsity (Spar)	$\mathit{\text{Spar}}=\sqrt{\frac{Sp}{n}}$	$\text{log}(\mathit{\text{Spar}})=\frac{1}{2}\text{log}(Sp)-\frac{1}{2}\text{log}(n)$	$\text{log}(r_{\mathit{\text{Spar}}})=\frac{1}{2}\text{log}(r_{Sp})-\frac{1}{2}\text{log}(r_n)$
Total perimeter (TP)	$TP=2\sqrt{\pi }·S{z}^{\frac{1}{4}}·n^{\frac{3}{4}}$	$\text{log}(TP)=\text{log}(2\sqrt{\pi })+\frac{1}{4}\text{log}(Sz)+\frac{3}{4}\text{log}(n)$	$\text{log}(r_{TP})=\frac{1}{4}\text{log}(r_{Sz})+\frac{3}{4}\text{log}(r_n)$
Item perimeter (IP)	$IP=2\sqrt{\pi }·S{z}^{\frac{1}{4}}·n^{-\frac{1}{4}}$	$\text{log}(IP)=(\text{log}(2\sqrt{\pi })+\frac{1}{4}\text{log}(Sz)-\frac{1}{4}\text{log}(n)$	$\text{log}(r_{IP})=\frac{1}{4}\text{log}(r_{Sz})-\frac{1}{4}\text{log}(r_n)$
Coverage (Cov)	$\mathit{\text{Cov}}=\sqrt{\frac{Sz}{Sp}}$	$\text{log}(\mathit{\text{Cov}})=\frac{1}{2}\text{log}(Sz)-\frac{1}{2}\text{log}(Sp)$	$\text{log}(r_{\mathit{\text{Cov}}})=\frac{1}{2}\text{log}(r_{Sz})-\frac{1}{2}\text{log}(r_{Sp})$
Apparent closeness (AC)	$AC=\sqrt{Sz·Sp}$	$\text{log}(AC)=\frac{1}{2}\text{log}(Sz)+\frac{1}{2}\text{log}(Sp)$	$\text{log}(r_{AP})=\frac{1}{2}\text{log}(r_{Sz})+\frac{1}{2}\text{log}(r_{Sp})$