Supplements
This supplement builds on definition of survey modes, based on six inherent mode characteristics, which need to be separated from implementation and contextual specifics, as elaborated in Section 6.1.2. However, the discussion there was predominantly focused on basic web survey mode and other closely related families of survey modes (basic online CSAQ, online CSAQ, web CSAQ and web-related survey mode), while here we present a big picture of all potential modes along with illustrative examples of them.