I would like to send out almost the same survey three times.
1) Time point 1: Survey 1 would include certain demographic information
2) Time point 2: Survey 2 would be the same survey but without the demographic information
3) Time point 3: Survey 3 would be the same as Survey 2
How can I do this anonymously?
If a respondent doesn't complete survey at timepoint 1, is there a way they could get survey #1 at time point 2. In other words, I don't want to make completion of Survey #1 a requirement to complete Survey 2 and 3.