Fig. 1. Concept of Interest Derived from a Meaningful Aspect of Health (Activities of Daily Living).

Health experiences (a) reported by the Patient Advisory Board (PAB) were mapped onto the functional domains (b) that were then operationalized (c). For example, the functional domain ‘Managing finances’ was assessed with an App mimicking the withdrawal of money. Operationalizations of this functional domain are then subdivided into measurable elements such as the total duration of an attempt to withdraw money, the duration to enter the correct PIN code, or the duration of entering the correct amount of money to be withdrawn. These ultimately translate into a Concept of Interest (CoI).