6 Design study II: Development of an ambulatory biofeedback app 193 2. Methods 2.1 Study Design 2.1.1 The Methodological Framework A design framework tailored to the setting and purposes was developed based on principles from user experience (UX) design and UCD. We previously published a detailed report on the development of this framework and our first steps in the development of the Sense-IT app [28]. We combined the conceptual overview of Elements of UX model [33] with the broader focused approach of the CeHRes Roadmap [34] and added a placeholder to specify the methods used. This led to the EMP framework. EMP stands for element-method-product, the main components of the model. Figure 4 shows a schematic overview of the EMP framework. We previously completed the steps of the first 2 elements of the framework, that is, the strategy and scope and the structure plane (in Figure 4, I and II of the elements of UX) [28]. The completion of these steps in the model yielded design requirements and mental models that serve as the basic input for the current, third element of the framework (in Figure 4, III, skeleton and surface of the elements of UX). In the third element, the desired product was a working prototype. This implied getting into the back-end organizational structure and flow (skeleton) and the front end or outer qualities such as visuals, sounds, and vibrations (surface). As the main UX method (the M in the EMP framework), we chose cyclic, iterative prototyping [35]. Figure 4. The EMP-framework. The framework is to be read from the bottom (ie, abstract considerations) to the top (ie, concrete considerations). The lines indicate the connection between the elements and the methods. The arrows point to the products that will result from the methods.
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