## 3 Materials and Methods
### Survey Design  
The surveying process involved evaluating 3D models of the sculptures through an AR application, as well as assessing the use of the AR application for the purpose of presenting artwork, such as sculptures, in public spaces. The participant group consisted of 51 undergraduate and master's students of architecture and computer graphics study programs from the Faculty of Technical Sciences at the University of Novi Sad. All participants were  
Figure 2: Heatmap illustrating correlation matrix of dimensions. Color scale varies from blue to red, where red indicates a positive correlation (r = 1). \begin{table}
\begin{tabular}{l l c c} \hline \hline
**Categories** & **Subcategories** & **N. of Items** & **[PERSON]’s \(\alpha\)** \\ \hline Engagement & & 8 & **0.74** \\  & Interest & 4 & 0.73 \\  & Usability & 4 & 0.69 \\ Engrossment & & 5 & **0.88** \\  & Emotional attachment & 2 & 0,76 \\  & Focus of attention & 3 & 0.83 \\ Total immersion & & 7 & **0.91** \\  & Presence & 4 & 0.90 \\  & Flow & 3 & 0.89 \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Results of [PERSON]’s alpha test. previously verbally introduced to the experiment, which involved evaluating artworks, particularly sculptures, in the same AR context. Given that the group had substantial exposure to AR tools and digital technology, all participants were comfortable using mobile AR applications and had no issues accessing the app. Since the research focused on the evaluation of sculptures in public spaces, the questionnaire was conducted in the outdoor atrium of the Faculty of Technical Sciences within the University of Novi Sad campus. The atrium consists of an empty, green, square-shaped space area surrounded by the faculty building blocks, resembling a small urban square. The selected atrium serves as a public space within the university campus that is easily visible both from the Faculty of Technical Sciences building and the surrounding external areas. It is also located near the faculty cafe, with its garden situated right next to the atrium. The choice of this specific location was based on several key factors:  
* The availability of free internet access via the Eduroam Wi-Fi network;
* The absence of visual obstacles (e.g., trees) that could occlude augmented reality content;
* Its partial isolation, which helped minimize potential distractions during the survey. The exact position of the location where the research was conducted, along with its immediate context, is shown in Figure 3.  
Each sculpture was positioned in the center of the empty atrium using a physical concrete plate (30 \(\times\) 30 cm), which served as a marker for tracking the 3D model of the sculpture information board in the real environment within the AR application (Table 4). To ensure consistency in the display, all 3D models of the sculptures were scaled to a height of 2 m. After interacting with the AR application to view the 3D models, participants completed three parts of the questionnaire. Firstly, participants answered questions related to the use of the AR application as a tool for evaluating sculptures in public spaces (measuring the level of engagement), after they had experienced viewing each sculpture within the AR application. It is important to emphasize that the students were unaware of which sculptures were digital and which were digitized. This was crucial in order to eliminate any potential bias. The survey process for evaluating each sculpture (measuring the level of engros  
Figure 3: The location of the outdoor atrium of the Faculty of Technical Sciences within the University of Novi Sad campus. Google Earth Pro 7.3.6.9796 [9] January 2025]. Eye alt. 708 ft.  
was structured so that students accessed QR codes for each individual sculpture, scanned them, and completed the survey sequentially. After viewing each sculpture in augmented reality, they answered a series of questions regarding the engrossment and total immersion aspect of that particular sculpture.