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PURPOSE: To offer guidance for future welfare technology research, this review provides an overview of current knowledge gaps and research needs as reported in primary scientific studies addressing the implementation of welfare technology for older people, people with disabilities and informal caregivers.

MATERIALS AND METHODS: This paper conducted a state-of-the-art review based on systematic searches in 11 databases followed by a descriptive qualitative analysis of 21 selected articles.

RESULTS: Knowledge gaps and research needs were identified concerning two categories: research designs and populations and focus of research. The articles reported needs for comparative studies, longitudinal studies, and demonstration trials as well as the development of co-design processes involving technology users. They also called for studies applying a social system theory approach, involving healthy and frail older adults, representative samples of users within and across countries, informal and formal caregivers, inter-and multidisciplinary teams, and care organizations. Moreover, there are reported needs for studies of acquirement, adoption and acceptance of welfare technology, attitudes, beliefs, and context related to welfare technology, caregiver perspectives on welfare technology, services to provide welfare technology and welfare technology itself.

CONCLUSIONS: There are considerable knowledge gaps and research needs concerning the implementation of welfare technology. They relate not only to the research focus but also to research designs, a social system theory approach and study populations. IMPLICATIONS FOR REHABILITATION When planning for the implementation of welfare technology for older people and persons with disabilities, it is important to be aware that necessary evidence and guidance may not always be available in peer-reviewed scientific literature but considerable knowledge gaps and research needs remain. Actors implementing welfare technology are encouraged to include researchers in their projects to study, document and report experiences made, and thereby contribute to building the evidence base and supporting evidence-based implementation.