## 3 Results
#### 3.1.2 Two-Dimensional Scale Combination  
In the two-dimensional scale combination of length (L) and width (D), the top and bottom interfaces are controlled by L and D, respectively. The area of the interface is represented by L \(\times\) D, while the aspect ratio of the interface is represented by L/D. Table 4 shows a strong positive correlation between L/D and the length perception (\(p=0.854\)). This means that the larger the L/D value, the longer people perceive the distance of the street space. On the other hand, there is a highly negative correlation between L/D and the perception of stability (\(p=-0.801\)). This indicates that as the L/D value increases, people perceive less stability in the street space. In the two-dimensional scale combination of length (L) and height (H), L and H control the side interface of the underground commercial street. The area of the side interface is \begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline  & & \begin{tabular}{c} **Length** \\ **Perception** \\ \end{tabular} & \begin{tabular}{c} **Width** \\ **Perception** \\ \end{tabular} & \begin{tabular}{c} **Height** \\ **Perception** \\ \end{tabular} & \begin{tabular}{c} **Openness** \\ **Perception** \\ \end{tabular} & \
\begin{tabular}{c} **Stability** \\ **Perception** \\ \end{tabular} &
\begin{tabular}{c} **Comfort** \\ **Perception** \\ \end{tabular} \\ \hline \multirow{2}{*}{L \(\times\) D} & Pearson & 0.062 & 0.672 ** & \(-0.546\) ** & 0.730 ** & 0.465 ** & 0.449 ** \\  & significance & 0.638 & 0 & 0 & 0 & 0 & 0 \\ \hline \multirow{2}{*}{L/D} & Pearson & 0.854 ** & 0.784 ** & 0.789 ** & 0.745 ** & 0.801 ** & 0.679 ** \\  & significance & 0 & 0 & 0 & 0 & 0 & 0 \\ \hline \multirow{2}{*}{L \(\times\) H} & Pearson & 0.763 ** & \(-0.299\) ** & 0.432 ** & \(-0.126\) & \(-0.227\) & \(-0.114\) \\  & significance & 0 & 0.02 & 0.001 & 0.336 & 0.081 & 0.386 \\ \hline \multirow{2}{*}{L/H} & Pearson & 0.566 & 0.001 & \(-0.078\) & 0.207 & \(-0.145\) & \(-0.028\) \\  & significance & 0 & 0.996 & 0.533 & 0.113 & 0.269 & 0.829 \\ \hline \multirow{2}{*}{D \(\times\) H} & Pearson & \(-0.309\) ** & 0.741 ** & \(-0.576\) ** & 0.626 ** & 0.674 ** & 0.505 ** \\  & significance & 0.016 & 0 & 0 & 0 & 0 & 0 \\ \hline \multirow{2}{*}{D/H} & Pearson & \(-0.461\) ** & 0.960 ** & \(-0.941\) ** & 0.849 ** & 0.622 ** & 0.489 ** \\  & significance & 0 & 0 & 0 & 0 & 0 & 0 \\ \hline \hline \end{tabular}  
* Significant at the 0.05 level (two-tailed). ** Significant correlation at the 0.01 level (two-tailed). Data with a background colour is data with a pearson index higher than 0.8.  
\end{table} 
Table 3: Table of correlation coefficients between the combination of one-dimensional scale variables and perception evaluation. \begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline  & & \begin{tabular}{c} **Length** \\ **Perception** \\ \end{tabular} & \begin{tabular}{c} **Width** \\ **Perception** \\ \end{tabular} & \begin{tabular}{c} **Height** \\ **Perception** \\ \end{tabular} & \begin{tabular}{c} **Openness** \\ **Perception** \\ \end{tabular} & \
\begin{tabular}{c} **Stability** \\ **Perception** \\ \end{tabular} &
\begin{tabular}{c} **Comfort** \\ **Perception** \\ \end{tabular} \\ \hline \multirow{2}{*}{H} & Pearson & 0.156 & \(-0.263\) * & 0.547 ** & \(-0.293\) * & \(-0.081\) & \(-0.102\) \\  & significance & 0.234 & 0.042 & 0 & 0.023 & 0.537 & 0.439 \\ \hline \multirow{2}{*}{D} & Pearson & \(-0.430\) ** & 0.928 ** & 0.836 ** & 0.823 ** & 0.726 ** & 0.557 ** \\  & significance & 0.001 & & 0 & 0 & 0 & 0 \\ \hline \multirow{2}{*}{L} & Pearson & 0.825 ** & 0.189 & 0.223 & 0.045 & \(-0.231\) & \(-0.09\) \\  & significance & 0 & 0.149 & 0.086 & 0.733 & 0.075 & 0.495 \\ \hline \hline \end{tabular}  
* Significant at the 0.05 level (two-tailed). ** Significant correlation at the 0.01 level (two-tailed). Data with a background colour is data with a pearson index higher than 0.8.  
\end{table} 
Table 3: Table of correlation coefficients between the combination of one-dimensional scale variables and perception evaluation.