## 5 Results
### Vrise
For the SSQ scores, the one-tailed Wilcoxon signed-rank test showed statistically significant differences in the LA mode of the game for the SSQ Total and all SSQ subscales when comparing the no rest-frame to the rest-frame conditions, except for the LA_NORF-LA_RFG combination for the SSQ Nausea subscale. No statistically significant differences were observed for the HA mode of the game, and also, no statistically significant differences were observed for the FMS and VRNQ-VRISE subscale scores. This did not support hypothesis H1, since using rest-frames in the LA mode of the game did have an opposite (negative) effect on the SSQ scores (more sickness). Additionally, no significant differences between the rest-frame conditions were observed for both modes of the game for all VRISE scales, which did not support hypothesis H2 in terms of the VRISE levels. Comparing the modes of the game, the comparisons presented in Table 4 are only made between the conditions without rest-frames, since, as it is noticeable from Table 2, there is an opposite effect of rest-frames in the LA and HA modes of the game, although, for HA, the difference is not statistically significant. Hypothesis H6 was supported for the SSQ Disorientation subscale and the FMS Average scale, since statistically significant differences were observed only between conditions LA_NORF and HA_NORF of the SSQ Disorientation subscale and LA_NORF and HA_NORF of FMS Average scale. The subjects reported significantly fewer disorientation symptoms and significantly fewer sickness symptoms assessed by the FMS Questionnaire when playing the LA mode of the game. experience scores were higher (better user experience) when rest-frames were not used, with the exception of the UEQ-S Hedonic quality scale in the LA mode of the game, and VRNQ--User experience subscale in the HA mode of the game for both rest-frame conditions. The Shapiro-Wilk test showed that the data was not normally distributed for all variables, so we used nonparametric statistical tests. To observe the differences between the combinations of conditions for the user experience scores and examine the hypotheses, the Wilcoxon signed-rank test was used as presented in Table 6.  
For the user experience scores, the resulting two-tailed Wilcoxon signed-rank test showed only one statistically significant difference in the LA mode of the game for the UEQ-S Pragmatic Quality between the LA_NORF and LA_RFG conditions. This partially supported hypothesis H3 that rest-frames would not affect the user experience, except in the LA mode of the game, where the user experience scores for UEQ-S Pragmatic Quality were significantly lower when rest-frame glasses were used. \begin{table}
\begin{tabular}{c c c c} \hline \hline
**VRISE Scale** & **Condition** & **Z** & \(\mathbf{p}\) \\ \hline \multirow{2}{*}{SSQ Total} & LA\_NORF- & \(-1.300\) & \(0.099\) \\  & HA\_NORF & \(\mathbf{-1.889}\) & \(\mathbf{0.030}\)* \\ \hline \multirow{2}{*}{SSQ Nausea} & LA\_NORF- & \(-0.948\) & \(0.181\) \\  & HA\_NORF & \(-0.714\) & \(-0.248\) \\ \hline \multirow{2}{*}{FMS Average} & \(\mathbf{LA\_NORF- }\) & \(\mathbf{-2.103}\) & \(\mathbf{0.017}\)* \\  & HA\_NORF & \(\mathbf{-1.322}\) & \(0.098\) \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Wilcoxon signed-rank test for the VRISE scores between mode of the game (LA vs. HA).