## 4 Results
### Quantitative Data Analysis
#### 4.2.3 Accuracy of Performing Tasks  
Table 8 shows the results of solving tasks based on this categorization, with the percentage of participants who achieved each of these results.  
At the basic sublevel, 62.26% of participants managed to insert all three 3D objects correctly, while a smaller number of participants (30.19%) inserted one object incorrectly. Only a few participants (7.55%) inserted two objects incorrectly. This indicates that objects of basic size are relatively easy to access for most participants. On the other hand, at the sublevel with the enlarged objects, there is a significantly higher number of participants who inserted two objects incorrectly (43.40%) or who were unable to insert a single object correctly (16.98%). This result indicates an increased level of difficulty of this sublevel compared to the basic sublevel, which is probably because the 3D objects are twice the size of a virtual fist.  
The sublevel with shrunken objects shows an improvement with a higher number of participants correctly inserting all three 3D objects (83.02%). This improvement indicates that the task on this sublevel was better adapted to the participants' expectations and abilities. On the reduced contrast sublevel, most participants (64.15%) managed to insert all three objects correctly, a smaller number (35.85%) of participants had one error, and no one had two or three errors. Better results on the last two sublevels could indicate that the  
\begin{table}
\begin{tabular}{l c c c c} \hline \hline \multicolumn{1}{c}{\multirow{2}{*}{**Sublevel**}} & \multicolumn{4}{c}{**Category**} \\  & **Correct** & **Mostly Correct** & **Mostly Incorrect** & **Incorrect** \\ \hline Basic & 62.26\% & 30.19\% & 7.55\% & 0.00\% \\ Enlarged objects & 3.77\% & 35.85\% & 43.40\% & 16.98\% \\ Shrunken objects & 83.02\% & 16.98\% & 0.00\% & 0.00\% \\ Reduced contrast & 64.15\% & 35.85\% & 0.00\% & 0.00\% \\ \hline \hline \end{tabular}
\end{table}
Table 8: Categorization of results on the first level based on accuracy in performing tasks. On the first level, the accuracy is represented by the number of correctly and incorrectly inserted 3D objects in four categories: correct (all objects are correctly inserted), mostly correct (two objects are correctly inserted), mostly incorrect (only one object is correctly inserted), and incorrect (none of the objects are correctly inserted).  
participants have adapted to the implemented interactions, which enables them to perform better by repeating the interactions.  
The accuracy of the participants at the fourth level, represented by the percentage of correctly solved tasks, is shown in Table 9.  
On the sublevel with horizontal alignment of the buttons, most participants achieved a high accuracy of 98.11%, which means that this sublevel was relatively easy to solve. The high success rate indicates that the size of the objects and the distance were optimally adapted to the abilities of most participants, so that they were able to interact precisely. The sublevel with vertical orientation shows a slight decrease in the success rate, at 92.45%. Although this level is still very successful, the smaller decrease in the percentage of correct responses indicates a slightly higher level of task difficulty compared to the first sublevel due to small changes in object size and distance. The sublevel with the distracting background shows a significant decrease in success, with a percentage of only 62.26% correct answers. This decrease indicates that the task conditions in this sublevel were significantly more difficult for the participants, resulting in a more challenging interaction due to the smaller object size, greater distance, and the introduction of distractions that affected the participants' ability to focus and be precise.  
Analysis of all three sublevels shows that variations in task design, such as changes in object size and distance, have a direct impact on subject performance and satisfaction.