## 3 Results and Questions Analysis
### Value Question: Are We Getting the Benefits?
On the positive side, there are some encouraging results, such as in the work of [PERSON] et al. [79], with a retrospective study of 167 patients in a large rehabilitation center for 3 years that showed significant improvements in functional measures of balance and gait. Another study showing positive outcomes is [PERSON] et al. [80], especially in cognitive functions, although it found that whilst the overall quality of the studies was good, there were no studies with a Downs and Black rating of excellent, and so they note that future research should focus on randomized controlled studies. The most interesting is the set of recommendations included at the end of the review for future studies: to describe the clinical information of the samples, to conduct longitudinal studies, to compare different levels of immersion, to systematically assess user acceptance and adverse events, to use well-known measures independent of the culture, countries, etc., to report the effect sizes (the \"strength\") of the outcomes, and to provide examples of generalization to real situations. Finally, in 2022, we found more studies supporting the positive outcomes of VR interventions, such as [PERSON] et al. [81], which showed, in a double-blind randomized control trial, particular benefits on stroke survivors with severe cognitive impairment as well as a reduction of the time spent in hospital for all patients that received the VR treatment. Regarding the perceived quality of patients, there is a clear motivation for improvement, according again to [PERSON] et al. [11] and [PERSON] et al. [60], although in terms of mastery confidence and incompetence fear, 3D virtual reality environments have worse results than more extensive 2D environments [32]. We can thereby conclude that we are clearly deriving some benefits from these initiatives, more in motor functions than in cognitive functions, and in patients' motivation and adherence as well, although the measurement of these benefits is too heterogeneous to be compared or aggregated. Nevertheless, larger studies like [PERSON] et al. [79] and [PERSON] et al. [66] have provided more solid evidence of the benefits in recent years. Table 1 shows a summary of the studies selected, regarding the four \"Are\" questions: \begin{table}
\begin{tabular}{c c c c} \hline  & _Statistige Quasite: Are We Doing the_ & _Architecture Question: Are We Doing_ & _Delivery Question: Are We Getting_ & _Value Question: Are We Getting_ \\  & _Right Things?_ & _Then the Right Way!_ & _Things Does Well?_ & _the Benefits?_ \\ \hline Problem definition & [PERSON] et al., 2010 [10] & & \\  & [PERSON] et al., 2011 [11] & & \\  & CMD Srucke Collineineaires 2019 [15] & & \\ \hline  & [PERSON] et al., 2018 [12] & & \\  & [PERSON] et al., 2019 [11] & & [PERSON] et al., 2021 [22] \\ Why virtual rehabilitation & [PERSON] et al., 2018 [12] & & [PERSON] et al., 2005 [23] \\  & [PERSON] et al., 2019 [17] & & \\  & [PERSON] et al., 2019 [3] & & \\  & [PERSON] and [PERSON], 2001 [18] & & \\ \hline  & & [PERSON] et al., 2014 [25] & \\  & & [PERSON] et al., 2016 [27] & \\  & & [PERSON] et al., 2019 [28] & \\  & & [PERSON] et al., 2019 [191] & \\  & [PERSON] et al., 2019 [11] & & \\  & & [PERSON] et al., 2015 [3] & \\  & & [PERSON] et al., 2019 [00] & [PERSON] et al., 2019 [52] \\ Best practices & [PERSON] et al., 2019 [20] & & \\  & & [PERSON] et al., 2020 [41] & [PERSON] et al., 2000 [37] & [PERSON] et al., [72] \\  & [PERSON] et al., 2021 [26] & & \\  & & [PERSON] et al., 2012 [60] & [PERSON] and [PERSON], 2005 [58] \\  & & [PERSON] et al., 2019 [16] & [PERSON] et al., 2018 [59] \\  & & [PERSON] et al., 2016 [45] & \\  & & [PERSON] et al., 2019 [16] & \\  & & [PERSON] et al., 2017 [46] & \\  & & [PERSON] et al., 2021 [4] & \\  & & [PERSON] et al., 2022 [68] & \\  & & [PERSON] et al., 2022 [50] & \\  & & [PERSON] et al., 2016 [51] & \\ \hline \end{tabular}
\end{table} 
Table 1: Summary table of the different aspects evaluated in the different “are” questions together with bibliographic references that support them.