# Impact of VR Application in an Academic Context
## 2 Materials and Methods
### Student Feedback: Surveys and Evaluation (Quiz, t-Test)
In the context of studying the impact of VR on education, the \(t\)-test is used to compare the performance of students who have received VR-based training with those who have received traditional classroom instruction. This approach can help identify any significant differences in performance between the two groups and validate the effectiveness of VR-based training. The null and alternative hypothesis of the \(t\)-test are as following: \begin{table}
\begin{tabular}{c c c} \hline \hline
**No.Crt.** & **Question** & **Type** \\ \hline
1 & Gender & Closed-ended \\ \hline
2 & City of residence & Open-ended \\ \hline
3 & What is your field of study? & Closed-ended \\ \hline
4 & Have you ever used VR equipment before? & Closed-ended \\ \hline
5 & If the answer to the previous question is yes, please specify in which context & Open-ended \\ \hline
6 & If you have used VR equipment before, please rate the & \\  & satisfaction level with your previous experience & Likert scale \\ \hline
7 & If you have used VR equipment before, do you consider that & \\  & multimedia effects had an impact on increasing engagement? & Likert scale \\ \hline
8 & What was the reason of your interest in experiencing the virtual & \\  & reality? & Closed-ended \\ \hline
9 & Did you like the EduAssistant VR recording shown? & Closed-ended \\ \hline
10 & Was the video recording of good quality? & Likert scale (1 to 5) \\ \hline
11 & Was the sound of the recording of good quality? & Likert scale (1 to 5) \\ \hline
12 & Were the subtitles useful? & Likert scale (1 to 5) \\ \hline
13 & Do you consider that the narrator was useful for a better & \\  & understanding of the registration? & Likert scale (1 to 5) \\ \hline
14 & Would you try a real VR experience after seeing this video of & \\  & EduAssistant’s capabilities? & Likert scale (1 to 5) \\ \hline
15 & After watching the video, did your interest in including VR in the & \\  & learning process increase? & Likert scale (1 to 5) \\ \hline
16 & Do you consider it useful to have a tool like this for learning? & Likert scale (1 to 5) \\ \hline
17 & Please provide your overall thoughts regarding this experience & Open question \\ \hline
18 & What else do you think is missing? & Open question \\ \hline \hline \end{tabular}
\end{table} 
Table 2: List of questions for quantifying students’ satisfaction with pre-recorded video. Assuming a significance level of 0.05, the following steps were performed:  
Calculate the mean and standard deviation of the exam scores for each group;  
Calculate the pooled standard deviation (SP) using the formula:  
\[\text{SP}=\sqrt{(n1-1)*s^{2}+(n2-1)*\frac{s^{2}}{(n1+n2-2)}}\]  
Calculate the \(t\)-statistic (\(t\)) using the formula:  
\[t=\frac{x1-x2}{SP*\sqrt{\left(\frac{1}{10}+\frac{1}{20}\right)}}\]  
Determine the \(p\)-value: Using a \(t\)-distribution table with 28 degrees of freedom (\(n1+n2\)\(-\) 2), we were able to find the \(p\)-value corresponding to our calculated t-statistic; if the \(p\)-value was less than 0.05, we rejected the null hypothesis and concluded that there was a significant difference in mean exam scores between the two groups. Eventually, the data collected were analyzed using the software Microsoft(r) Excel(r) for Microsoft 365 MSO (Version 2301).