## 4 Experimental Environment and Results
### Summary of Results  
This study has three major research outcomes: the establishment of the design framework, the system design implementation, and the field study validation results. These findings comprehensively validate the practical value of the seamless technology framework in elderly-centered interactive system design. Firstly, regarding the design framework, this study successfully established an integrated framework addressing both psychological needs and functional requirements. This framework encompasses six core dimensions: three psychological aspects (life integration, warmth, and emotion) and three functional aspects (intuition, simplicity, and personalization). The research results demonstrate that this integrated design approach effectively enhances users' acceptance, reflected in the continuous improvement in the SUS scores from an initial 77.85 to a final score of 82.15. \begin{table}
\begin{tabular}{l|l l l l l} \hline \hline
**Evaluation Metric** & **Phase 1** & **Phase 2** & **Improvement** & \(p\)**-Value** & **Cohen’s d** \\ \hline
**Implementation** & & & & & \\ Sites & 25 & 9 & - & - & - \\ Sessions & 33 & 30 & - & - & - \\ Participants & 659 & 1338 & 102.8\% & - & - \\ Context type & Institution- & \
\begin{tabular}{l} Diverse \\ based (85\%) \\ \end{tabular} &
\begin{tabular}{l} Expanded to \\ four clocks \\ \end{tabular} & - & - \\
**System usability** & & & & & \\ SUS score & 77.85 (\(\pm\)2.31) & 82.15 (\(\pm\)2.15) & 5.52\% & \textless{}0.001 & 0.92 \\ Learnability & 89.12 (\(\pm\)1.98) & 94.12 (\(\pm\)1.87) & 5.61\% & \textless{}0.01 & 0.86 \\ Usability & 75.03 (\(\pm\)2.45) & 82.46 (\(\pm\)2.33) & 9.90\% & \textless{}0.001 & 1.24 \\ \hline \hline \end{tabular}  
* Note: Phase 1 focused on institutional settings, while Phase 2 was expanded to diverse contexts including running events (n = 386), exhibitions (n = 452), schools (n = 285), and kindergartens (n = 215). Values presented as mean (\(\pm\)SD). Statistical significance determined using paired t-tests. Effect sizes reported as Cohen’s d, where d \(\geq\) 0.8 indicates a large effect.  
\end{table} 
Table 6: Phase comparison of implementation results and system usability 1. Secondly, regarding the system design, the \"Pillow Fight\" development outcomes demonstrate the practical value of the design framework. The system successfully implemented the concept of seamless technology integration into daily life, creating natural and intuitive intergenerational interaction experiences. In particular, the innovative aspects, in terms of material selection, interaction design, and personalized adaptation, enabled the system to perform excellently in practical applications while maintaining high user-friendliness. Thirdly, regarding the field validation research, the two-phase systematic validation provided rich empirical data. The research results particularly highlight three key findings:  
1. Significant benefits of intergenerational interaction: The statistical analysis demonstrates that the intergenerational interaction mode significantly outperformed the standard usage modes (14.15% SUS improvement, \(p<\) 0.001, [PERSON]'s d = 1.24), validating the design framework's effectiveness in promoting intergenerational connections. 2. Important influence of usage context: Group usage contexts demonstrated superior results compared to individual usage contexts (9.60% SUS difference), reflecting the positive impact of social interaction on the system's effectiveness. 3. Empirical support for long-term benefits: The 12-week tracking data demonstrated sustained health promotion effects, including coordination improvements (23.5%) and steady increases in activity participation. These research findings not only validate the effectiveness of our proposed design framework and methodology but also provide a concrete empirical foundation for future elderly technology product development.