5 Design study I: How to create an ambulatory app for patients with BPP 169 5.2.2 Closed Card Sort The results of the closed card sort for patients and therapists are presented in Tables 3 and 4. All predetermined functions of the system were deemed critical or at least appropriate additional information. As such, they are all part of the mental model that the participants have of the future system. Table 3. Results of the open card sorting task with the therapists. Each cell shows the number of times the cards got sorted into each category.
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