TABLE 4.

Summary of the essential themes while performing the spatial memory task.

Questions concerning the VR task	Patient’s impressions	Themes
(1) What difficulties did you encounter in carrying out the task?	It was difficult to relocate the objects in the correct position. At first, it was a little bit complicated to use the 3dRudder. The chair’s seat should be placed in a higher position. It was difficult to relocate the objects when the perspective changed.	Difficulties in the recall phase.
(2) Was it difficult to use the technology?	No Sometimes it was difficult to understand how to use the 3dRudder.	3dRudder training
(3) Were there technical issues during the session?	No	Technology’s challenges
(4) Did you have to ask for help to understand how to use the system?	No During the recall phase, I had to ask the examiner to repeat the instructions.	Difficulties in the recall phase.
(5) Did it take a long time to understand how the technology works?	No It takes a little bit of practice to understand how the technology works.	Need for training
(6) Was the exercise complicated?	The difficulty concerned the relocation of the objects in the correct position. At first, it was a little bit complicated to understand how to use the technology. Slightly more proficiency is needed in using the 3dRudder. Inizio modulo	Technology’s challenges
(7) Did you like the virtual environment?	Yes, I liked it. No, I don’t like to use the VR since I suffer when using it. Yes, I liked the environment, especially the presence of the mountains.	VR environment preferences
(8) Were some parts of the system complicated?	No It was difficult to relocate the objects in the correct position, especially when the obelisk was not in the environment.	Tasks’ challenges
(9) Did you have problems using the platform the Oculus Rift S/Samsung UHD 4 k monitor and the 3dRudder?	No No, now I feel that I can use VR to train	Competence in using VR
(10) Would you like to use the system for exercising?	Yes No, because I suffer while using VR technology	VR negative effects
(11) Do you think this system could be useful for other types of patients?	Yes Yes, especially if a patient is motivated to train their memory. Yes, if they have some problems with their memory.	Patient’s motivation in memory rehabilitation
(12) Did you prefer to use the Oculus Rift S or the Samsung UHD 4 k monitor?	I preferred the Samsung UHD 4 k monitor as I could see the objects more clearly. Sometimes it was difficult to see properly objects with the Oculus Rift S.	VR preferences