Darcy Ummels

(Re)design of a user ‐ friendly interface andevaluation of experiences in daily life | 73 4 phase (Appendix 4.1) and served as a departure point for the remaining three phases, which are outlined below. To assess the use of and experiences with the adapted activity tracker, a sample of elderly individuals using the activity tracker for a period of 2 weeks. Afterward, all participants were interviewed. Figure 4.1 Schematic overview of the two designs used in this study. (Re)design of the user ‐ interface Definition phase To prioritize the 53 characteristics outlined in the discovery phase, the MoSCoW model was used. 34 Four experts in wearables (a professor in the field of smart devices, a physiotherapist, an advisor from the knowledge centre for sports and physical activity, and a clinical operator of a human kinetics lab) were asked to prioritize these characteristics, based on technical complexity and market distinctiveness. When at least two experts rated a characteristic as a “should have” the characteristic was labelled critical. Development and delivery phase Based on the definition phase, three key aspects of the activity tracker were included: (1) the design of the activity tracker, (2) the way the activity tracker provides feedback,