Method

The research design of triangulation combined an iterative validation of eHealth usability evaluation methods with a case study-designed, explorative study. This study primarily collected qualitative data from human-computer interaction specialists and participants gained in the exploratory case study. In addition to the primarily qualitative research methods used, a quantitative procedure of frequency rating was chosen to strengthen the accuracy of the results. In the course of the selected research design, all the identified eHealth usability evaluation methods were formalized for evaluating eHealth usability. This section presents the research design of this work in relation to the research questions.