For the moderated interviews I had 4 participants. 2 of the participants have membership cards at Activ Fitness Clubs, therefore they are familiar with the services and studios from their living area. 2 of them are male and 2 are female. 2 of them are parents. All 4 of them speak German.
Because in this study case, the purpose is to improve an existing product, I used the summative usability methodology.
Each participant was asked to complete a given task thinking aloud (while I was obseving the behavour, recording video and measuring the time on task). At the end the participant was asked 5 questions to rate on a five-point scale of agreements (Likert Rating Scale metrics)
After that, each participant was asked about personal impressions regarding the website, what difficulties they encounter while navigating and what they wish to add/change for increased satisfaction and experience.