# Using Mixed Reality (MR) to Improve On-Site Design Experience in Community Planning
## 3 Results and Analysis
### On-Site Design Convenience Using MR  
In accordance with the interviews, the mean and standard deviation of the score for on-site design convenience using MR were 3.90 and 0.36, respectively, which primarily contained three specific factor evaluations in our questionnaire (see Figure 14).  
First, regarding the comfort of the MR-DSS, the mean and standard deviation of the score were 3.56 and 0.51, respectively (Figure 14). We found that some participants wore the head-mount display Microsoft HoloLens with their hands supporting the weight. However, most of the participants did not report feeling uncomfortable during their ten-minute design experience with MR. Only a small number of participants pointed out that the Microsoft HoloLens was uncomfortable for someone wearing glasses. Regarding the difficulty of learning the MR-DSS, the mean and standard deviation of the score were 4.44 and 0.51, respectively, as shown in Figure 14. Most of the participants stated they were able to grasp the basic manipulation rules of the MR-DSS, during the ten-minute usage introduction. The experiment also demonstrated that almost all the participants could engage in essential design actions with this MR-DSS, Regarding the control of the MR-DSS, the mean and standard deviation of the score were 3.69 and 0.48, respectively (Figure 14). We could see that almost all the participants had achieved real-time design control with  
\begin{table}
\begin{tabular}{c c c c} \hline \hline \multicolumn{4}{c}{**Mean Ranks of Scores for the MR Usage Experience Groups**} & \(\mathbf{p}\)**-Value** \\ \hline \hline  & With MR usage experience & Without MR usage experience & (Kruskal–Wallis) \\ \hline On-site design accuracy using MR & 11.90 & 6.95 & 0.049 \\ \hline \hline \end{tabular}
\end{table}
Table 3: The Kruskal–Wallis test for different MR usage experience groups in on-site design accuracy using MR.  
Figure 12: The average scores for on-site design accuracy using MR in different MR usage experience groups.  
this MR-DSS. Nevertheless, most responded that they were not used to the current natural control mode based on gestures and gazes and used a large amount of effort in performing tiny detail manipulation.  
The Kruskal-Wallis test (Table 5) suggested significant differences (\(p=0.014<0.05\)) in the scores of on-site design convenience with MR among different design experience groups. Specifically, the average scores in different design experience groups (1-10 years, 11-20 years, and 21-30 years) were 4.11, 3.73, and 3.33, respectively, indicating a noticeable drop as design experience increased (Figure 15). Additionally, there were no identified  
Figure 14: The mean and standard deviation of the score for the on-site design convenience using MR, the comfort of the MR-DSS, the difficulty of learning the MR-DSS, and control of the MR-DSS.  
Figure 13: The average scores for on-site design accuracy using MR in different design experience groups.  
differences (\(p\) = 0.077 \(>\) 0.05) between the different MR usage experience groups with respect to the scores for on-site design convenience using MR, according to the Kruskal-Wallis test (Table 6). Most participants stated that the basic control of this MR support system was easy to grasp, even those who had never used an MR device.