## 3 Research Procedure
### Advanced Analysis of Research Data  
An advanced analysis of the data collected was conducted to statistically prove the former conclusions. In the advanced analysis, the influence being by a window and being subjected to direct sunlight was specifically focused on. As shown in Table 2, we applied a \(t\)-test to investigate the group statistics related to direct sunlight. All of the values of significance are below 0.05, which statistically means that direct sunlight has a critical effect on the users' experience.  
In Table 3, the user's satisfaction with the optical environment and the light environment, and their overall comfort, all showed higher scores when without direct sunlight, meaning direct sunlight mostly has a negative impact on user experience.  
In Table 4, we see that there are significant differences between the users' feelings towards light and dark, and their satisfaction with the light environment, between the window groups. However, the value of significance of overall comfort is above 0.05, which means, in a statistical sense, that being by the window is not critical to users' satisfaction.  
\begin{table}
\begin{tabular}{c c c c} \hline \hline  & \multicolumn{2}{c}{**(a) Light and Dark Feel**} \\ \hline  & \multicolumn{2}{c}{**Frequency**} & \multicolumn{2}{c}{**Percentage (\%)**} \\ \hline  & Dark & 1 & 0.4 \\ \cline{2-4}  & Dim & 7 & 2.9 \\ \cline{2-4} Effective & Neutral & 79 & 33.1 \\ \cline{2-4}  & Bright & 121 & 50.6 \\ \cline{2-4}  & Dazzling & 27 & 11.3 \\ \cline{2-4}  & Very Dazzling & 3 & 1.3 \\ \hline All & & 238 & 99.6 \\ \hline  & \multicolumn{2}{c}{**(b) Light Environmental Satisfaction**} \\ \hline  & Dissatisfied & 14 & 5.9 \\ \cline{2-4} effective & Neutral & 62 & 25.9 \\ \cline{2-4}  & Satisfied & 137 & 57.3 \\ \cline{2-4}  & Very satisfied & 26 & 10.9 \\ \hline All & & 239 & 100 \\ \hline \hline \end{tabular}
\end{table}
Table 1: An overview of the basic information: light environmental satisfaction.  
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline  & \multicolumn{2}{c}{**Levene’s Test**} & \multicolumn{2}{c}{**\(t\)-Test for Equality of Means**} \\ \cline{2-5}  & \multicolumn{2}{c}{**F**} & \multicolumn{1}{c}{**Sig.**} & \multicolumn{1}{c}{\(t\)} & \multicolumn{1}{c}{**df**} & \multicolumn{1}{c}{**Sig. (2-Tailed)**} \\ \hline \multirow{2}{*}{**Light and dark feel**} & \multicolumn{2}{c}{**Equal variances assumed**} & \multirow{2}{*}{2.295} & \multirow{2}{*}{0.131} & \(-\)3.869 & 233 & 0.000 \\ \cline{2-5}  & \multicolumn{2}{c}{**Equal variances not assumed**} & & & \(-\)3.875 & 175.337 & 0.000 \\ \hline \multirow{2}{*}{**Light environmental**} & \multicolumn{2}{c}{**Equal variances assumed**} & \multirow{2}{*}{12.374} & \multirow{2}{*}{0.001} & 4.002 & 233 & 0.000 \\ \cline{2-5}  & \multicolumn{2}{c}{**Equal variances not assumed**} & & & 3.825 & 152.158 & 0.000 \\ \hline \multirow{2}{*}{**Overall comfort**} & \multicolumn{2}{c}{**Equal variances assumed**} & \multirow{2}{*}{19.636} & \multirow{2}{*}{0.000} & 2.790 & 233 & 0.006 \\ \cline{2-5}  & \multicolumn{2}{c}{**Equal variances not assumed**} & & & 2.614 & 143.450 & 0.010 \\ \hline \hline \end{tabular}
\end{table}
Table 2: Group statistics regarding whether in direct sunlight or not.