## 5 Discussion, Conclusions, and Future Work
### Discussion of Results
#### 5.1.4 Research Limitations and Future Directions  
Despite achieving positive outcomes in this systematic empirical research, several limitations need to be addressed in future studies. The primary limitation lies in the geographical scope of the research. Although this study spanned 34 sites, covering various contexts, including institutional care, home services, and community care stations, it was confined to Taiwan. This geographical limitation may affect the generalizability of the research findings across different cultural contexts, particularly in the implementation of intergenerational interaction models, where the cultural background might influence their effectiveness. Regarding the research methodology, although this study employed mixed methods, combining quantitative tools (the SUS scale) with qualitative methods (observations and interviews), there remains room for improvement in the depth of longitudinal tracking research. Particularly in the second phase, while the 12-week tracking period yielded improvements in coordination abilities, longer-term observation is needed to fully assess the system's overall health promotion benefits for elderly users. At the technical level, while this study successfully developed a soft sensing technology and achieved seamless technology integration, there remains room for improvement in personalized adaptation mechanisms. Particularly considering the heterogeneity of the elderly population, the performance differences observed among the dementia, sub-healthy, and healthy groups highlight the need for more refined personalization in future system designs. Based on the limitations identified in this study, the following directions are proposed for future research:  
1. **Expanding the Cross-Cultural Research Scope** Future research should expand the geographical scope of the seamless technology framework's validation beyond the current focus on Taiwan. Evaluating the framework's effectiveness across different cultural contexts would not only strengthen its external validity, but also provide valuable insights into how cultural factors may influence the design's suitability and acceptance. Specifically, future studies could investigate how the design elements may need to be adapted to account for cultural differences in elderly users' perceptions, behaviors, and technology preferences. By developing more culturally sensitive design guidelines, the seamless technology framework could become applicable to a broader global audience. 2. **Strengthening Longitudinal Tracking Research** While the current study observed encouraging short-term improvements in users' physical activity, coordination, and overall health status, longer-term evaluations are warranted to fully assess the system's sustained impact on cognitive function and psychological well-being. Future research should incorporate more comprehensive physiological and psychological indicators, systematically tracking changes in users' health conditions over extended periods. This longitudinal approach would enable a deeper understanding of how the system's intergenerational interaction features and health monitoring capabilities contribute to cognitive enhancement and improvements in quality of life for elderly users. The insights gained from such long-termassessments could guide further refinements to the system's design and inform the development of similar elderly-centered interactive technologies. 3. **Developing Personalized Adaptation Mechanisms** The current study observed differentiated responses and performance across the three user groups (healthy, sub-healthy, and dementia), highlighting the importance of personalized adaptation in meeting the diverse needs of elderly users. Future research should focus on developing adaptive interaction mechanisms that can automatically adjust to individual users' physical, cognitive, and psycho-social capabilities.