## 5 Experiment Results and Discussion
### Subjective Evaluation of Interaction Mechanisms in SG2  
Apart from the questions related to other qualitative data related to SG2, the questionnaire contained questions whose aim was to examine the ease of use of the assigned interaction mechanisms. These questions were formed using simple vocabulary to be more comprehensible to people with intellectual disabilities or people with no previous experience with AR. In this sense, instead of choosing the degree of agreement with the statement, e.g., \"I find the interaction in the virtual object translation task easy to use\", participants were asked to rate how difficult or easy it was for them to do what the goal of the specific task was, e.g., move the object to the required place. So, the participants answered the questions by choosing a rating from 1 to 5 where 1 = Very difficult, 2 = Difficult, 3 = Neither difficult nor easy, 4 = Easy, and 5 = Very easy. The analysis of subjective ratings aimed to provide a general overview of how participants perceived the ease of interaction with the assigned mechanisms rather than to compare differences between groups or draw inferential conclusions. Therefore, descriptive statistics were employed to summarize key findings.  
First, the distribution of participants' ratings for three tasks of virtual object transformation is calculated and presented in Figures 13-15. For the _Translation_ task, most of the participants answered that it was very easy (54.63%) or easy (31.48%) to move the virtual object to the required location with the assigned interaction (Figure 13). While 9.26% of participants answered that it was neither difficult nor easy for them to solve the given task,  
disabilities and without disabilities. In addition, among those participants with disabilities, there are mostly people with cognitive and neurological disorders and/or specific learning difficulties, as well as people who, in addition to the above, have physical difficulties or physical disabilities and visual impairments. The respondents without disabilities are participants from different age groups.  
For the analysis of the subjective evaluation of interaction mechanisms in transformation tasks in SG2, descriptive statistics were calculated (N = 108). The calculated measures (average value M, median C, standard deviation Sd, minimum and maximum value, and confidence interval CI = 95%) are shown in Table 11. Figure 16 shows a graph with mean values of ratings of each transformation task with a confidence interval of 95%. These results provide insight into participants' subjective evaluation of the interaction mechanisms, complementing the descriptive statistics in Table 11.  
The results indicate that the vast majority of participants found the interaction mechanisms assigned to them for the virtual object transformation tasks easy or very easy, which can also be seen from the mean ratings per task. Since the goal of universal design is to enable the use of the solution by as many users as possible, although it is a smaller share of participants, participants who gave a rating of 3 or lower were additionally analysed to identify problems that prevent the user from performing a particular task.