## 2 Systematic Review Methodology
### Literature Review Search Process
By explicitly linking clusters to review themes (e.g., Cluster 2 to healthcare implementation), this method provided a data-driven perspective that complemented traditional synthesis. Following the initial search, a rigorous three-stage screening process was implemented to refine the 1126 identified articles. Three researchers independently assessed the articles against predefined inclusion criteria (detailed in Table 2). These criteria ensured the selection of relevant studies by focusing on (1) peer-reviewed articles addressing technology acceptance among older adults, (2) empirical or theoretical studies conducted within domestic settings, and (3) studies with participants classified as pre-frail (scoring less than four on the Rockwood Frailty Scale [27]). Notably, the inclusion criteria stipulated that the studies be composed in English to ensure linguistic coherence and accessibility within the review process. Figure 2 delineates the entire flow of the systematic literature review process, meticulously adhering to PRISMA guidelines and provides a clear and structured overview of the sequential steps involved in the review. Following the initial deduplication process using DOI (Digital Object Identifiers), the number of articles was reduced from 1126 to 920 articles. Next, a two-stage screening process was implemented. Titles and abstracts were independently screened by three researchers against the predefined inclusion criteria. Disagreements were resolved through discussion to reach a consensus on inclusion. This process yielded 138 articles for full-text review. Finally, a full-text review using the same criteria resulted in the selection of 63 articles for final inclusion in this review. \begin{table}
\begin{tabular}{c p{227.6 pt}} \hline \hline  & **Description of the Inclusion Criterion** \\ \hline
1 & Must be peer-reviewed articles published in journals or edited collections with a rigorous editorial process. \\
2 & Empirical studies must involve human participants, where participants are either older adults themselves or individuals directly involved in their care (e.g., family caregivers, medical professionals, gerontechnology developers). \\
3 & Theoretical studies must focus on improving the well-being or independence of older adults. \\
4 & Must focus on the influential factors in older adults’ acceptance and usage of technology, with a specific emphasis on either technologies that support ageing in place or technologies that assist caregivers of older adults. \\
5 & Much focus on a specific technology domain relevant to older adults, including but not limited to assistive technology and/or robotics, the Internet of Things (IoT), or eHealth services. \\
6 & Must focus on technology adoption and usage within the context of older adults’ homes, excluding studies conducted in rehabilitation centres, hospitals, nursing homes, etc. \\  & Must involve participants classified as frail, with a majority (or all participants in studies with homogenous samples) scoring less than or equal to 4 on the Rockwood Frailty Scale. \\
8 & Must be published in English or a translated version in English. \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Inclusion and exclusion criteria applied in systematic literature review.