Chapter 6 198 2.6 Second Cycle: Testing With Therapists 2.6.1 Participants Of 25 health care professionals at the clinic, 4 were invited to participate. They were selected via a stratified sampling method [45]. The sample included 1 psychiatrist, 1 bodily oriented psychotherapist, and 2 groupworkers or sociotherapists. All were native Dutch and aged between 47 and 62 years (mean age 52 years, SD 7.1). Overall, 2 participants were males and 2 were females. One of the participants personally owned a smartwatch. In addition, 3 of the participants indicated to have affinity with wearable technology but indicated not to closely monitor developments in the field of smart devices. 2.6.2 Procedure The app and the 2-day testing procedure were kept similar so that the health care professionals would get a similar UX as the patients. On the second day of testing, a series of 4 paper task scenarios were completed along with the SUS and a short interview. 2.6.3 Materials Hardware The same mobile phones and smartwatches were used as in cycle 1. System Usability Scale See the description under cycle 1. Task Scenarios A total of 4 scenarios were written by the research team, based on the functions of the app. Each scenario consisted of a task to be performed on either the mobile phone or smartwatch: (1) add a comment to your latest measurement, (2) change the watch face to another Sense-IT watch face, (3) add a general comment to the timeline (not to a measurement), and (4) let the app stop measuring your HR. With each scenario, the user was asked which steps he or she took to perform the task, what difficulties were encountered while performing the task, and whether the user had further comments or suggestions. Interview To close off the 2-day hands-on testing phase, a brief, semistructured interview was held with each therapist. The interview questions were the same as in cycle 1, but the interview also inquired how the app could be implemented in the therapies of their patients.
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