Mixing Methods and Sciences: A Longitudinal Cross-Disciplinary Mixed Methods Study on Technology to Address Social Isolation and Loneliness in Later Life

Despite a growing interest in longitudinal mixed methods research, the literature offers few examples of complex designs. To evaluate a communication-based technology to address social isolation and loneliness in later life, we conducted two long-term studies in aged-care homes. We used a longitudinal convergent mixed methods design and a cross-disciplinary approach that employed techniques from social and computer sciences to ensure a comprehensive evaluation. While cross-disciplinary mixed methods research is also growing, a discussion of its methodological practices, challenges, and strategies is still scarce. This article contributes to mixed methods research by providing lessons learned on how cross-disciplinary mixed studies can be designed and integrated from collection to interpretation, particularly when combining convergent and longitudinal approaches. We also show the value of "design-in-action"-that is, the refinement and adjustment of techniques throughout research, as methods "talk to each other."