## 5 User Evaluation Results  
### Interfering Auditory Stimulus Effect  
To investigate whether users are generally able to ignore interfering auditory stimuli when synchronizing with visual rhythmic patterns, we evaluated the differences between \"Sound\" and \"Mute\" conditions. In this regard, both for activation time and error rate, the Wilcoxon Signed-Rank test suggests that there is no significant difference (\(p>0.05\)) between the distributions, neither by gender nor by age ranges (see Figure 5).  
Regarding ease of synchronization (questionnaire responses) the \"Mute\" condition is perceived as easier than \"Sound\" one considering all participants regardless of gender and age. Although the median is five for both conditions, the differences between the distributions is significant (\(p=0.039\)). However, when distinguishing between genders, we detect a significant difference within females (Medians: four for \"Sound\" vs. five for \"Mute\", \(p=0.038\)), but not males (\(p>0.05\)). Finally, with regard to age groups, no significant difference was found (\(p>0.05\)) (see Figure 6).  
Figure 5: Boxplots showing error rate and time of activation by comparing \"Mute\" (red) and “Sound” (green) conditions for (1) all participants, (2) by gender, and (3) by gender and age. None of differences are significant.  
Table 2 shows comparisons across all age groups and genders with _p_-values for error rate, time of activation and ease of synchronization.  
\begin{table}
\begin{tabular}{c c c c c} \hline \hline  & **Group** & **Sound Median** & **Mute Median** & **Sig.** \\ \hline \multirow{6}{*}{Error} & All & 3.5 & 4 & 0.32 \\ \cline{2-5}  & Males & 1 & 2 & 0.57 \\ \cline{2-5}  & \(\rightarrow\)18-25 & 0 & 1 & 0.67 \\ \cline{2-5}  & \(\rightarrow\)26-40 & 1 & 2 & 0.49 \\ \cline{2-5}  & \(\rightarrow\)41+ & 13 & 9 & 0.89 \\ \cline{2-5}  & Females & 10 & 10 & 0.44 \\ \cline{2-5}  & \(\rightarrow\)18-25 & 8 & 6 & 1 \\ \cline{2-5}  & \(\rightarrow\)26-40 & 8 & 6.5 & 0.39 \\ \cline{2-5}  & \(\rightarrow\)41+ & 21.5 & 20.5 & 0.58 \\ \hline \multirow{6}{*}{Time (ms)} & All & 3668 & 3658 & 0.71 \\ \cline{2-5}  & Males & 3368 & 3513 & 0.40 \\ \cline{2-5}  & \(\rightarrow\)18-25 & 3239 & 3199 & 0.93 \\ \cline{2-5}  & \(\rightarrow\)26-40 & 3605 & 3602.5 & 0.17 \\ \cline{2-5}  & \(\rightarrow\)41+ & 4390 & 4044 & 0.75 \\ \cline{2-5}  & Females & 4088 & 3947 & 0.25 \\ \cline{2-5}  & \(\rightarrow\)18-25 & 3730 & 3785 & 0.36 \\ \cline{2-5}  & \(\rightarrow\)26-40 & 3895.5 & 3850 & 0.55 \\ \cline{2-5}  & \(\rightarrow\)41+ & 4341.5 & 4229.5 & 0.14 \\ \hline \multirow{6}{*}{Easiness} & All & 5 & 5 & 0.03 * \\ \cline{2-5}  & Males & 5 & 5 & 0.50 \\ \cline{2-5}  & \(\rightarrow\)18-25 & 5 & 5 & 1 \\ \cline{2-5}  & \(\rightarrow\)26-40 & 5 & 5 & 1 \\ \cline{2-5}  & \(\rightarrow\)41+ & 4 & 4.5 & 0.18 \\ \cline{2-5}  & Females & 4 & 5 & 0.03 * \\ \cline{2-5}  & \(\rightarrow\)18-25 & 4 & 5 & 0.70 \\ \cline{2-5}  & \(\rightarrow\)26-40 & 4 & 5 & 0.05 \\ \cline{2-5}  & \(\rightarrow\)41+ & 4 & 5 & 0.20 \\ \hline \end{tabular}
\end{table}
Table 2: Condition comparison regarding Error, Time, and Easiness of synchronization for all age group. Significant differences are marked with asterisk.  
Figure 6: Boxplots showing ease of synchronization by comparing “Mute” and “Sound” conditions for (1) all participants, (2) by gender, and (3) by genders and age. Significant differences are marked with asterisk.