## 3 Results
### PANDORA's User Experience Evaluation  
We recruited eight PwPD from APDPK and the Saudis clinic. In the first validation stage, we conducted a one-day session in a controlled environment, following a predefined script to identify significant issues. During this session, participants tested the ONParkinson app and provided feedback through a user satisfaction questionnaire. In order to ensure anonymity, we referred to participants as Pn, where n denotes their assigned participant number. As shown in Table 5, the participants varied in age, sex, profession, years since diagnosis, and engagement in physiotherapy. The mean age of the participants was 67.6 \(\pm\) 9.7 years, and the mean number of years since diagnosis was 10.6 \(\pm\) 6.6 years. In addition to their physiotherapy routines, participants reported various other physical activities and levels of comfort with technology. P1 frequently used an Android smartphone and computer to access the Internet, while P2 relied on a basic cell phone, limited to calls and texting. P3 supplemented physiotherapy with static cycling and rowing once a week and enjoyed using his Android smartphone for taking photos and videos. P4, although not engaged in physiotherapy, stayed physically active through handball, soccer, table tennis, \begin{table}
\begin{tabular}{l c} \hline \hline
**Indicator** & **Accuracy** \\ \hline Domain Coverage & 100\% \\ \hline Coherence Response Capacity & 100\% \\ \hline Dialog Management Capacity & 89\% \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Technical Performance Indicators: results. \begin{table}
\begin{tabular}{l c c c} \hline \hline
**Metrics** & & & \\ \hline Exercise names correctly identified & 24 & 24 & 100 \\ \hline Exercise stages correctly identified & 24 & 24 & 100 \\ \hline Repetitions correctly identified & 24 & 24 & 100 \\ \hline Sets correctly identified & 24 & 24 & 100 \\ \hline Exercise descriptions correctly identified & 24 & 24 & 100 \\ \hline Motivation asserts correctly performed & 72 & 72 & 100 \\ \hline Coherent responses & 122 & 122 & 100 \\ \hline Conversations chained correctly & 124 & 124 & 100 \\ \hline Well-being fallback correctly recovered & 108 & 108 & 100 \\ \hline Non-understandable inputs correctly detected & 77 & 116 & 66 \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Technical Performance: measures. and swimming three times a week. He also used his Android smartphone and computer to browse the Internet and social networks and play games. [PERSON] added regular walking to her routine and comfortably used her Android smartphone and computer for browsing the Internet and recording media. [PERSON] experienced difficulty with his smartphone's touch sensitivity due to [PERSON]'s, but continued to use his smartphone, tablet, and computer for various tasks. Outside of physiotherapy, he engaged in fishing, table tennis, and cycling five times a week. [PERSON] incorporated walking twice a week into his schedule and used his iOS smartphone for browsing the Internet and capturing photos. [PERSON] focused solely on physiotherapy and did not participate in additional physical activities, but used her iOS smartphone and computer for communication and online browsing. The results of the five-point Likert items and the corresponding average for each item in the user satisfaction questionnaire are shown in Table 6. The average for each participant across all metrics is also presented in the last row. A minimum of thirty observations is often required to perform significant statistics [52]. Moreover, according to the World Health Organization [53], between ten and one hundred system users need to test a system to assess its usability effectively. Therefore, evaluating PANDORA's usability effectively is impossible because only eight users have tested it. A larger sample size could better capture variability in user experience, particularly among PwPD at different stages of disease progression, with varying levels of comfort with technology, and with differing physical capabilities.