## 3 Results
### Usability and User Experience Evaluation
Overall, a total of 296.6 \(\pm\) 244.7 h of activity on the application were logged (318.3 \(\pm\) 304.5 and 258.7 \(\pm\) 70.0 h in the home study and clinical setting study, respectively), and 172.1 \(\pm\) 126.1 exercises were performed (185.3 \(\pm\) 155.1 in the home study vs. 148.9 \(\pm\) 50.0 in the clinical setting study). The values for each of the exercise types are summarized in Table 6.  
Figure 2: Patient observation grid results. The success percentages **(A)**; execution times in seconds (**B**); number of errors **(C)**; and percentage of patients who needed help **(D)** for each task are depicted. Task 1: connect CogniViTra (turn on the box using the power button); Task 2: log in as a patient using the following data; Task 3: Read the welcome notes and click start; Task 4: start the exercise session and perform the dual-task training session; Task 5: pause the game, read the instructions for the exercise again, then resume and continue the exercise; Task 6: once you finish the programed session, consult the results; Task 7: exit the session by clicking on “Exit”. \begin{table}
\begin{tabular}{l c c c} \hline \hline  & **Overall (n = 22)** & **Home Study (n = 14)** &
\begin{tabular}{c} **Clinical Setting Study** \\ **(n = 8)** \\ \end{tabular} \\ \hline \hline \multicolumn{1}{l}{**General**} & & & \\ \hline Training weeks, n (SD) & 8.1 (3.7) & 8.8 (4.2) & 6.9 (2.5) \\ \hline Percentage of completed weeks, \% (SD) & 60.9 (23.4) & 55.5 (19.6) & 70.23 (27.7) \\ \hline Total accesses completed, n (SD) & 14.5 (11.9) & 17.4 (14.0) & 9.5 (4.4) \\ \hline Total accesses completed/week, n (SD) & 1.7 (0.9) & 1.9 (1.0) & 1.4 (0.4) \\ \hline Patients with more than 2 accesses/week, n (\%) & 4 (18.2) & 4 (28.6) & 0 (0.0) \\ \hline Total time realized (min) & 296.6 (244.7) & 318.3 (304.5) & 258.7 (70.0) \\ \hline Time realized (min/week) & 36.4 (18.4) & 34.9 (22.4) & 39.0 (8.6) \\ \hline \% patients with >40 min/week & 7 (31.8) & 5 (35.7) & 2 (25.0) \\ \hline Total games played, n (SD) & 172.1 (126.7) & 185.3 (155.1) & 148.9 (50.0) \\ \hline Total errors, n (SD) & 32.9 (22.7) & 33.7 (24.6) & 31.50 (20.6) \\ \hline Errors/min, n (SD) & 0.1 (0.1) & 0.1 (0.1) & 0.1 (0.1) \\ \hline \hline \end{tabular}
\end{table} 
Table 6: Log files. All values are depicted as means and standard deviations. Figure 3: Professional observation grid results. The success percentages (**A**); execution times in seconds (**B**); number of errors (**C**); and percentage of professionals who needed help (**D**) for each task are depicted. Task 1: Access Cognivitra; Task 2: Log in as a professional; Task 3: On the dashboard, open the “Add new patient” menu and create a new patient; Task 4: Save the data; Task 5: On the dashboard, open the “schedule session” icon and select “add”; Task 6: Choose the “advanced” schedule type and select 2 days of training per week; Task 7: Select the exercises to prescribe and the type of action needed; Task 8: Set the starting level and duration of each exercise; Task 9: Check the structure of the scheduled sessions and save the data; Task 10: Exit the session by clicking on “Exit”.