## 5 Experiment Results and Discussion
### Quantitative Data Analysis
#### 5.2.3 Subjective Evaluation of Interaction Mechanisms in SG1  
Subjective evaluation of interaction satisfaction is integrated into SG1. After bringing the game to an end, interaction mechanisms are displayed on the screen, for which it is possible to give a rating by choosing the number of stars from 1 to 5, where 1 = Very dissatisfied, 2 = Dissatisfied, 3 = Neither dissatisfied nor satisfied, 4 = Satisfied, 5 = Very satisfied. User satisfaction with interactions in this context is defined as the degree to which the user's needs, expectations and preferences are satisfied by the interaction, with an  
Figure 10: Pie chart showing the distribution of skipped transformation tasks (Translation, Scaling, and Rotation) across two interaction mechanisms (Touch Gestures and Indirect Controls). TG = Touch Gestures, IC = Indirect Controls.  
emphasis on ease of use as a factor that affects interaction satisfaction. Each interaction is supported by a visual representation to make it easier for the participants to recognize which interaction was in which task. In addition, for some participants with disabilities, the evaluation of interactions was explained orally so that their ratings would more reliably reflect the ease of use of a particular interaction.  
For the analysis of the subjective evaluation of interaction mechanisms in transformation tasks in SG1, descriptive statistics were calculated (N = 107). A participant who did not rate at least one of the interaction mechanisms was excluded from the analysis. The calculated measures (average value M, median C, standard deviation Sd, minimum and maximum value, and confidence interval CI = 95%) for participants' ratings of interaction mechanisms in each transformation task are shown in Table 9. Figure 11 shows a graph with mean values of ratings for each transformation task (Translation, Scaling, and Rotation), along with error bars indicating the 95% confidence intervals. These results provide insight into participants' subjective evaluation of the interaction mechanisms, complementing the descriptive statistics presented in Table 9.  
Results indicate that ratings for most of the tasks were distributed around rating 5, i.e., the participants were most often very satisfied with the interaction in the task. The exceptions are Scaling (TG) and Rotation (TG) tasks where the most common rating was 4, meaning that they were less satisfied with their interaction mechanisms than in other tasks. In these tasks, there is also greater variability in ratings compared to other tasks. The results correspond with the results of completion time and skipped task option, where  
Figure 11: Mean ratings of interaction mechanisms (TG = Touch Gestures, IC = Indirect Controls) for each transformation task (Translation, Scaling, Rotation) in SG1 with 95% confidence intervals.  
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline  & **Translation (TG)** & **Translation (IC)** & **Scaling (TG)** & **Scaling (IC)** & **Rotation (TG)** & **Rotation (IC)** \\ \hline
**M** & 4.5 & 4.48 & 4.00 & 4.79 & 3.83 & 4.72 \\ \hline
**C** & 5 & 5 & 4 & 5 & 4 & 5 \\ \hline
**Sd** & 0.9 & 0.95 & 1.2 & 0.69 & 1.31 & 0.74 \\ \hline
**min** & 1 & 1 & 1 & 1 & 1 & 2 \\ \hline
**max** & 5 & 5 & 5 & 5 & 5 & 5 \\ \hline
**CI = 95\%** & 4.33; 4.68 & 4.3; 4.66 & 3.77; 4.23 & 4.65; 4.92 & 3.58; 4.08 & 4.58; 4.86 \\ \hline \hline \end{tabular} Note: M—mean, C—median, Sd—standard deviation, min—minimum, max—maximum, CI = 95%—95% confidence interval  
\end{table}
Table 9: Descriptive statistics for the subjective evaluation of interaction mechanisms in transformation tasks in SG1 (N = 107). TG = Touch Gestures, IC = Indirect Controls.  
Scaling (TG) and Rotation (TG) tasks also stand out, so we can conclude that scaling and rotation with touch gestures are more critical tasks in SG1 than others.