## 5 Discussion
### Accessibility Recommendations  
Accessibility does not happen by chance; it must be intentional. The integration of accessibility into software must be carefully planned from the start, and it is necessary to prioritize it at every step of the design process, rather than just aiming for inclusivity. It is important to emphasize that there is no universal best way of interaction that applies to UIs for solving all types of tasks. Therefore, before selecting a type of interaction and integrating accessibility features into such software solutions, it is important to first evaluate the goal and purpose of the software. **Recommendation 1:**_When implementing accessibility options in software solutions, you should first consider the goal and purpose of the software solution._  
Execution times for tasks at all four levels show a similar trend--execution times for tasks are longer when a new interaction is used for the first time. This finding highlights the importance of consistent alignment between levels and tasks when developing interaction mechanisms to promote user adaptation and optimize task execution. **Recommendation 2:**_When implementing interactions, it is important to ensure consistency between the different levels and tasks._  
The first parameter analyzed is the size of the object with which the user interacts directly. The results of the study show that in direct interaction, the interface with a ratio of 1:0.5 between the size of the virtual hand and the 3D object provided the best experience for the participants and created a balance between the challenge of the interaction and the satisfaction of the participants. This suggests that using smaller 3D objects with this ratio could be useful for tasks that require precision. It allows participants to develop and apply precision, leading to a greater sense of satisfaction and achievement. On the other hand, for tasks where execution time is critical, a 1:1 ratio between the virtual hand and the 3D object showed the best results. This ratio allows for faster and more efficient execution of tasks, reduces the likelihood of frustration, and allows participants to better focus onspeed of execution and a greater likelihood of accuracy and precision of interaction with the 3D object. **Recommendation 3:**_For software solutions where the accuracy of the user in solving tasks is important, a smaller size of 3D objects with a ratio of 1:0.5 to the virtual hand is optimal, while for solutions where speed in performing interactions is more important, a ratio of 1:1 between object and virtual hand is recommended._  
The second parameter analyzed for accessibility is distractions during interaction in the form of other 3D objects or distracting backgrounds. In the sublevels without distractions, task completion times were shorter than in the sublevels with distractions. This suggests that such an environment is ideal for time-limited tasks where the focus is on speed and efficiency. However, no participant skipped a level in these sublevels, suggesting that the distractions, while challenging, are not too much of an obstacle and could aid concentration and engagement in the task. At these sublevels, participants were generally more satisfied with the ease of task performance and the importance of accuracy. This approach could be useful in maintaining participants' attention and improving their skills. **Recommendation 4:**_The design of 3D interfaces in time-critical tasks (e.g., quizzes with a time limit) should be free of potential distractions, while distracting elements can be useful to increase user engagement when interacting with objects in longer, potentially more monotonous tasks. The application's accessibility options should allow the user to change the interactivity of distracting elements by making them static or removing them completely from the task._  
The third accessibility parameter, which refers to the intuitiveness of the use of UI elements, is based on the analysis of direct and indirect interaction with 3D objects.