A recent meeting with a survey sponsor on how they might change a single-mode survey to a mixed-mode survey began with the sponsor's assertion: ‘Changing to mixed-mode is not something we want to do; it makes our work more difficult, but we don't think we have a choice'. Surveyors are now considering changing from single-mode to mixed-mode designs for a variety of reasons. One reason for considering a transition to mixed-mode procedures is to improve coverage, through using a second or third mode to increase the likelihood that all members of a random sample can be contacted with a request to complete the questionnaire. A second reason for the use of multiple modes ...
Designing a Mixed-Mode Survey
Designing a mixed-mode survey