Finally the panel of 11 experts have all sent their responses back regarding the content validity of our proposed questionnaire in here. We ended up with 7 values with at least one relevant item. For an item to qualify as relevant to a value, 9 out of the 11 as per this method need to have ticked the corresponding box in the matrix (as either essential or useful). You can see in this table the final result, i.e. the matrix of questionnaire items (in Dutch) and which values are supposed to be relevant.