4.2.2. Design

The first group (*n* = 7) pre-pilot tested the PERGAMON platform for two weeks at home. Based on the results several suggestions were made and implemented to improve the platform. The second group (*n* = 14) pilot tested the adjusted PERGAMON platform for six to eight weeks at home. Both studies used a pre-post test design with a mixed-method approach in which questionnaires as well as open-ended interview questions were used.
