## 3 Results
### Limitations Reported by the Different Studies  
The limitations of the studies we reviewed are reported in Table 5. Nine articles did not mention any limitations [29; 32; 35; 37; 38; 45; 49; 52; 54]. Common limitations mentioned are cybersickness, a very common side effect of VR [36; 42], small participant sample size [30; 33; 34; 40; 44; 46; 50], and having participants who were non-WUs [34; 46; 51; 53; 55]; limitations were mentioned but they were specific to the individual study. The systematic reviews [24; 31] did not explicitly report any limitations related to the studies they reviewed. \begin{table}
\begin{tabular}{c c} \hline
**Study** & **Conclusions** \\ \hline \multirow{3}{*}{[PERSON] et al. [40]} & \multirow{3}{*}{\(\bullet\)} & Powered mobility simulators provide children and adults practice opportunities to achieve proficiency that may not be available otherwise due to the cost of a powered chair for training, therapy time and safety concerns \\ \hline \multirow{6}{*}{[PERSON] et al. [44]} & \multirow{3}{*}{\(\bullet\)} & The simulator has potential to be used as a tool for ADL training, in a safe situation and free from the inherent risks of improper driving. \\  & \multirow{3}{*}{\(\bullet\)} & Participants demonstrated more confidence and efficiency in the use of the simulator as the experiment progressed. \\  & \multirow{3}{*}{\(\bullet\)} & Improvement of participants on the proposed training activity was observed. This may suggest that the presented EPW simulator has the potential to be used to introduce the EPW to users with no previous contact with the device and has the potential to help individuals train and develop the required motor, cognitive and visual skills to properly drive the EPW, while providing a safe training environment. \\  & \multirow{3}{*}{\(\bullet\)} & The inclusion of alternative controls with biomedical signals for driving the EPW is essential so that individuals with severe motor disabilities can use the simulator, improve their skills, and be able to drive their own EPW. \\  & \multirow{3}{*}{\(\bullet\)} & The simulator is a tool that can be used in rehabilitation centers and even at the EPW user’s home to assist in learning and improving the skills of driving an EPW. \\  & \multirow{3}{*}{\(\bullet\)} & The multimodal simulator promotes the inclusion of people and helps to improve the quality of life and independence of EPW users. \\ \hline \multirow{6}{*}{[PERSON] et al. [46]} & \multirow{3}{*}{\(\bullet\)} & The simulator with a non-immersive setup (2D monitor display) provides lower levels of immersion (presence), usability scores, and arousal response according to the SAM questionnaire (subjective data) and the physiological data (EDA). However, it requires less cognitive load, which is essential to improve the user QoE. \\  & \multirow{3}{*}{\(\bullet\)} & The dynamic motion of acceleration and deceleration were not perceptive for the non-immersive setup (desktop group) but were for the headset groups \\  & \multirow{3}{*}{\(\bullet\)} & The physiological response in terms of HRV and EDA were better for the headset groups. \\  & \multirow{3}{*}{\(\bullet\)} & The immersive set-up with a smooth change of acceleration (s-shape profile) provided a better physiological response among the groups. \\  & \multirow{3}{*}{\(\bullet\)} & The dynamic immersive simulator without adequate motion configuration may lead to an unpleasant experience with a high cognitive load. \\ \hline \multirow{6}{*}{[PERSON] et al. [41]} & \multirow{3}{*}{\(\bullet\)} & Simulator is an affordable, user friendly interface based on hardware and simulation software that can be used anywhere including at home and in school. An additional advantage is that continual adult assistance is not needed, so children can be independent when practicing. Can provide additional practice when powered wheelchairs are not available or there are time constraints. Introducing a simulator for practice could be in addition to powered mobility practice or as a sole practice mode. \\ \hline \end{tabular}
\end{table}