## 3 Results
### Themes and Categorization
\begin{table}
\begin{tabular}{p{113.8 pt} p{113.8 pt} p{113.8 pt}} \hline \hline
**Reference** & **Cluster** & **Justification of Cluster** \\ \hline
[11] & Emotional and Social Support & The study focuses on SASRs designed to offer companionship and emotional relief to elderly individuals, addressing issues like loneliness and depression. \\ \hline
[16] & Emotional and Social Support & This study explores robots that engage patients emotionally, providing companionship and supporting cognitive functions, which help alleviate emotional distress in dementia patients. \\ \hline
[18] & Emotional and Social Support & The review examines the impact of non-facilitated interactions by SASRs on dementia patients, focusing on emotional support through unmediated social engagement. \\ \hline
[13] & Emotional and Social Support & This study focuses on creating robots capable of empathetic interactions, helping establish emotional bonds between robots and users, which enhances social and emotional support. \\ \hline
[17] & Emotional and Social Support & This study explores how SASRs can build trust through facial and emotional expressions, strengthening the emotional bonds between AI and human users. \\ \hline
[22] & Emotional and Social Support & This study consolidates evidence on the emotional benefits of SASRs for elderly individuals, emphasizing their role in enhancing emotional well-being and social interaction. \\ \hline
[21] & Emotional and Social Support & This study focuses on the use of robots to provide emotional support to older adults suffering from depression, aiming to improve their quality of life through social interaction. \\ \hline
[20] & Therapeutic Robots for Special Needs & This study discusses robots that support children’s emotional well-being in healthcare settings, offering comfort and reducing anxiety during medical treatments. \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Overview of key studies on social and assistive robots: cluster and justification. \begin{table}
\begin{tabular}{p{113.8 pt} p{113.8 pt} p{113.8 pt}} \hline \hline
**Study** & **Brief Description** & **Contribution to the _Health Domain_** \\ \hline
[26] & This study evaluates the effect of exposure duration to socially assistive robots on older adults with dementia, focusing on outcomes like agitation, depression, and quality of life. It found that pet-type robots helped reduce agitation and depression. & The study supports the use of pet-type robots in dementia care, especially in long-term care facilities, showing benefits in reducing agitation and depression. The findings call for further research to develop comprehensive intervention plans for their use. \\ \hline
[27] & This systematic review identifies and classifies outcome measures used to assess rehabilitation or assistive robot devices. The study finds a lack of standardized measures, which complicates comparisons across studies. & The research highlights the need for standardized, validated scales for evaluating rehabilitation or assistive robots, improving the ability to assess their effectiveness and user satisfaction. The identification of PYTHEIA offers a potential solution for bridging this gap. \\ \hline \hline \end{tabular}
\end{table} 
Table 3: _Cont._Based on the design and application of these robots, the studies can be grouped into three broad categories: _emotional and social support_, _cognitive support_, and _therapeutic robots for special needs_. However, While the dominant clusters for each study have been identified, it is important to note that some studies also touch upon adjacent clusters, indicating a broader scope of impact. For example, [PERSON] et al. [11], primarily focused on emotional and social support, also contribute to cognitive support, as emotional relief in elderly individuals can enhance cognitive engagement.